BID DOCUMENTS: SECTION 6

TECHNICAL SPECIFICATIONS STATE HIGHWAYS AUTHORITY OF JHARKHANDPRIVATE

TECHNICAL SPECIFICATIONS1.

PREAMBLE

1.1The Technical Specifications contained herein shall be read in conjunction with the other Bidding Documents as specified.

1.2

SITE INFORMATION

1.2.1The information given hereunder and provided elsewhere in these documents are only indicative for general awareness. The Contractor shall satisfy himself regarding all aspects of site conditions and no claim whatsoever shall be entertained for insufficiency or incorrectness of information provided in these documents.

1.2.2The area in which the works are located is mostly plain terrain, the approximate longitude and latitude of the region being is Latitude 86.7845 & Longitude 24.4952 and Latitude 87.0787 & Longitude 24.6032 respectively.1.2.3

General Climatic Conditions

1.2.3.1The variation in daily temperature in this region is as under:

i) During summer months, from about 23o C minimum to 43o C maximum.

ii)During winter months, from about 8(C minimum to 30(C maximum. 1.2.3.2The average annual rainfall in the area is of the order of 1400 mm, a good portion of which is concentrated during the months of July to Sept. each year.

1.2.3.3The range of relative humidity goes upto maximum of 37%.1.2.4

Seismic Zone

The works are located in Seismic Zone II - III as defined in IRC: 62000.

2.

GENERAL REQUIREMENTS

The Technical Specifications in accordance with which the entire work described in Bid Document shall be constructed and completed by the Contractor shall comprise of the following:

2.1

PART-I: General Technical Specifications

The General Technical Specifications shall be the "SPECIFICATIONS FOR ROAD AND BRIDGE WORKS (LATEST REVISION) issued by the Ministry of Road Transport and Highways, and published by the Indian Roads Congress with all up-to-date amendments issued by Ministry of Road Transport and Highways (MORT&H).

2.2

PARTII: Special Technical Specifications

The Special Technical Specifications, provided in this document, shall comprise of:

i) Various amendments/modifications/additions to the "General Technical Specifications" referred to in PART I above

and

ii)Additional Specifications for particular item of works not covered in PARTI.

2.2.1The following Clauses of General Technical Specifications i.e. the "SPECIFICATIONS FOR ROAD AND BRIDGE WORKS (LATEST REVISION) have been amended/modified/added to form a part of Special Technical Specification.

102, 108, 109, 110, 111, 112, 121, 201, 202, 301, 305, 306, 401, 406, 408, 409, 501, 504,507, 509, 511, 521,601, 602, 801, 803, 804, 901, 903, 1006, 1007, 1009, 1014, 1101, 1103, 1104, 1107, 1113, 1115, 1118, 1119, 1202, 1203, 1204, 1205, 1206, 1207, 1208, 1209, 1210, 1214, 1215, 1502, 1503, 1509, 1510, 1703, 1704, 1705, 1706, 1707, 1709, 1713, 1714, 1802, 1806, 2005, 2006, 2009, 2504 and 2706.

2.2.2The Additional Specifications comprise of specifications for particular items of works not covered in PARTI

APPENDIX - 1 to APPENDIX - 8 have been added to General Technical Specifications i.e. the "SPECIFICATIONS FOR ROAD AND BRIDGE WORKS (LATEST REVISION) to form a part of the Special Technical Specification.

2.3Where a particular clause or a part thereof in General Technical Specifications i.e. "SPECIFICATIONS FOR ROAD AND BRIDGE WORKS (LATEST REVISION) referred in PARTI above is amended/modified/added upon by Special Technical Specification referred in PARTII above, such amendment/modification/addition supersedes the relevant Clause or part of the Clause.

2.4When an amended/modified/added Clause supersedes a Clause or part thereof in the said Specifications, then any reference to the superseded Clause shall be deemed to refer to the amended/modified/added Clause or part thereof.

2.5In case of any conflict or inconsistency between the provisions amended/modified/added Clause of Special Technical Specification and that of General Technical Specifications under reference, the amended/modified/ added Clause of Special Technical Specification shall always prevail over General Technical Specifications.

2.6In the absence of any definite provisions on any particular issue in the aforesaid Specifications, reference may be made to the latest codes and specifications of IRC, IS, BS and AASHTO in that order. Where even these are silent, the construction and completion of the works shall conform to sound engineering practice as approved by the Engineer and in case of any dispute arising out of the interpretation of the above, the decision of the Engineer shall be final and binding on the Contractor.

SPECIAL TECHNICAL SPECIFICATIONS

A.AMENDMENTS/MODIFICATIONS/ADDITIONS TO EXISTING CLAUSES OF GENERAL TECHNICAL SPECIFICATIONS

Clause 102DEFINITIONS

The following abbreviations shall be added in this Clause:

"SHAJ" State Highway Authority of Jharkhand

RCD Road Construction Department

GOJ Government of Jharkhand

"MORT&H" Ministry of Road Transport & Highways

Clause 108.4Delete first two sentences.

Clause 109.9Delete 2nd and 3rd sentence and add the following Setting out of the road alignment and measurement of angles shall be done by using total station.Clause 110Encumbrances in Construction Area, including Trees and Utilities -

Replace whole of this clause with the following:

Clause 110.1The contractor shall be responsible to coordinate with service provider / concerned authorities for cutting of trees, shifting of utilities and removal of encroachments etc. and making the site unencumbered from the project construction area required for completion of work. This will include initial and frequent follow-up meetings / actions / discussions with each involved service provider / concerned authorities. The contractor will not be entitled for any additional compensation for delay in cutting of trees, shifting of utilities and removal of encroachments by the service provider / concerned authorities. Payment for cutting of trees and shifting of utilities as required by the concerned department shall be made by the Employer.

Clause 110.2 Drawings, scheduling the affected encumbrances such as trees and services like water pipes, oil pipelines, cables, gas/oil pipes, electricity lines, accessories, telephone poles and OFC cables etc. shall be verified by the willing bidder in the office of the Employer. Copy of the drawings, however, will be issued to successful bidder under clause 107 of specification, for verification by him for accuracy, necessary co-ordination and work.Clause 110.3The Employer will make payments to the respective service provider / authorities for cutting of trees and shifting of utilities, wherever required. The contractor will obtain necessary approval from such Authorities after payments by the Employer and also in cases where payments are not required to be made for such shifting. The Employer will also write to all concerned departments / service provider organization for expediting and facilitating cutting of trees, shifting of utilities and removal of encroachment etc.

Clause 110.4 Any services affected by the Works must be temporarily supported by the Contractor who must also take all reasonable measures required by the various bodies to protect their services and property during the progress of the Works. It shall be deemed to be part of the Contract and no extra payment shall be made for the same.

Clause 110.5The Contractor may be required to carry out certain works for and on behalf of the various bodies and he shall also provide, with the prior approval of the Engineer, such assistance to the various bodies as may be authorized by the Engineer.

Clause 110.6Payment

For coordinating the work of cutting of trees, shifting of utilities and removal of encroachments etc., the contractor will be paid a lump-sum amount per km. or part thereof of the section.

Such amount will be deemed to cover all coordination work plus any risk associated with delay, disruption and the need to adjust the programme due to delay in tree cutting and shifting of utilities and removal of encroachments etc.

Clause 111Precautions for Safeguarding the EnvironmentThis whole clause shall be substituted by following:

Clause 111.1GeneralThe contractor shall take all precautions for safeguarding the environment during the course of the construction of works. He shall abide by all rules, regulations and laws in force governing pollution and environmental protection that are applicable to the area where the works are situated.

NOISE:

The Contractor shall mitigate against any sustained increase in base line ambient sound levels at sensitive receptors during construction of work.

All construction operations shall be performed in a manner to minimize noise and vibration. The parameters for noise are detailed below:

70 dB (A) for day and night;

50 dB (A) for day and 45 dB (A) for night for residential and silence zone areas.

If the noise level are found to be above these standards and it is determined by the Engineer that these levels are due to the equipment or plants deployed by the contractor, he shall undertake at his own cost measures as approved by the Engineer to bring these levels down to the specified levels. Contractor shall ensure:

Placement of stationery equipment at least 115m away from inhabitant areas and 200m from sensitive areas to minimize noise impacts.

Construction activities generally prohibited between 10 p.m. to 6 a.m. near habitation.

Provision of using ear plugs, helmets by workers exposed to high noise levels.

Erecting sign boards at sensitive and residential locations prohibiting use of air horns.

Labour shall be warned against the hunting of wild life, if any. No archaeological site shall be disturbed.

Clause 111.2Borrow Pits for Embankment ConstructionBorrow pits shall not be dug within the right-of-way of the road. Contractor will ensure that proper excavation techniques are used to improve stability and safety of the borrow area. The excavation shall be carried out in such a way that the area does not inundate during monsoons generate cesspools of water for breeding site. The area after excavation shall be properly landscaped. The stipulations in Clause 305.2.2 shall govern.

Clause 111.3Quarry OperationsThe contractor shall obtain material from licensed quarries only after the consent of the forest department or other concerned authorities. The quarry operation shall be undertaken within the purview of the rules and regulations in force. Contractor shall ensure scheduling the movement of transport carrying material to and from site during non-peak hours. The trucks carrying dusty material like fly ash shall be covered with tarpaulin and provided with adequate free board to prevent spillage. End boards shall be provided in loaders to prevent spillage. Stockpiling of material shall be properly planned so as to ensure that no traffic jam takes place on the highway.

Clause 111.4Control of Soil Erosion & SedimentationThe contractor shall carry out the works in such a manner that soil erosion is fully controlled. The stipulations in Clause 306 shall govern for this purpose.

Clause 111.5Precautions against DustThe contractor shall take all reasonable steps to minimize dust nuisance during the construction of the works. All existing highway and roads used by vehicles of the contractor or any of his sub-contractor or suppliers of materials or plant, and similarly any new roads which are part of the works and which are being used by traffic, shall be kept clean and clear of all dust/mud or other extraneous material dropped by the said vehicles or their tyres. Similarly, all dust or mud or other extraneous material from the works spreading on these highways shall be immediately cleared by the contractor. Clearances shall be effected immediately by manual sweeping and removal of debris, or, if so directed by the Engineer, by mechanical sweeping and clearing equipment, and all dust, mud and other debris shall be removed entirely from the road surface. Additionally, the road surface shall be hosed or watered using suitable equipment to avoid dust pollution. Special care shall be taken to combat dust problem originating from use of fly ash.

Clause 111.6 Pollution from Hot Mix Plant, Batching Plant & Other Construction MachineryThe Contractor shall ensure the use of relatively new, well maintained hot mix plant (batching plant) so that emission conforms to the CPCB norms and be fitted with dust extraction unit avoid prolonged engine powered equipment idleness. Asphalt mixing sites shall be located more than 500m from any community or residence. The hot mix plant shall be founded on compacted/paved surface so that the spills do not affect the aquifer. Properly sizing and maintenance of mufflers, engine intake, silencers and engine enclosures shall be carried out. The contractor shall take every precaution to reduce the levels of noise, vibration, dust and emission from his plant. The contractor shall be fully responsible for any claims for damages caused to the owner of property, fields and residence in the vicinity.

All vehicles, equipments and machinery for construction operation will be regularly maintained to ensure that pollution emission levels conform to CPCB(Central Pollution Control Board) norms. All vehicles should be fitted with silencer and dust removal device.

Construction vehicles, machinery & equipment will move or be stationed in the designated area to avoid Compaction of soil ensuring the perseverance of the top soil for agriculture.

Clause 111.7Road SafetyThe contractor shall provide adequate circuit for traffic flow around construction areas, control speed of construction vehicles through road safety and training of drivers, provide adequate signage, barriers and flag persons for traffic control. If there are traffic jams during construction, measures shall be taken to relieve the congestion with the assistance of traffic police. Safety of workers undertaking various operations during construction will be ensured by providing helmets, masks, safety goggles etc.

Clause 111.8Sanitation & Waste Disposal in Construction CampContractor shall ensure that construction camps are located at a distance of minimum 200m from water sources. Special attention shall be paid to the sanitary conditions of the camps. The contractor shall ensure that sufficient measures are taken i.e. provision of garbage tanks and sanitation facility. Waste in septic tanks shall be cleaned periodically. Garbage shall be collected in four soakage pits at each construction site and disposed of daily. Contractor shall provide adequate measures for the health care of workers and arrange their regular medical check-up to ensure that they do not suffer from infectious disease. At every work place, good & sufficient potable water supply will be maintained to avoid waterborne/water related diseases. If any pits are dug at construction/camp site, which are not filled and may turn into mosquito breeding sites during monsoons, either these shall be filled up properly so that no water gets accumulated or sprayed frequently with pesticides to prevent mosquito breeding. Prior permission of the Engineer and regulatory authority shall have to be taken by the contractor for discharging or disposing of any material arising from the execution of workers.

Clause 111.9Substance Hazardous to HealthThe contractor shall not use or generate any material in the work, which are hazardous to the health of persons, animals or vegetation. Where it is necessary to use some substance, which can cause injury to the health of the workers, the contractor shall provide suitable clothing or appliances to his workers, viz. earplugs, helmets or dust masks.

Clause 111.10 The contractor at his own cost shall make good any structural damage to the existing roads/structures caused by any action whatsoever relating to his construction operations his construction equipment and no claim whatsoever on this account shall be entertained.

Clause 111.11 Use of Nuclear GaugesNuclear gauges shall be used only where permitted by the Engineer. The contractor shall provide the Engineer with a copy of the regulations governing the safe use of nuclear gauges he intends to employ and shall abide by such regulations.

Clause 111.12Environmental MonitoringIn order to carry out periodic checks environmental monitoring will be carried out by the Engineer as per schedule and if any parameter is found above the acceptable standards, mitigation measures/control measures as decided by the Engineer shall be complied with by the contractor at his own cost.

Clause 111.13Protection of Existing TreesMany of the existing trees within the right of way will be cut for construction of roadway by Forest Department or any other agency (Refer clause 110 also). The contractor shall take all necessary measures to ensure safety and protection of the remaining trees from any action whatsoever relating to his construction operations in the adjoining areas.

The contractor shall make his own arrangements of fuel for use of his labour from outside the forest range as use of forest property or any other agencys property as firewood or any other domestic use is strictly prohibited. The contractor shall be fully responsible for any complain from the Forest Department or any other agency and shall indemnify the Employer for any damage if so caused by the contractor on such account.

Clause 111.14 Disposal of Materials outside Work SiteNotwithstanding other relevant provision in the contract, the excess material generated by dismantling, excavation, waste material and lubricants, used oil, gasoline and other such substance etc., shall be removed from site, outside the right of way at regular intervals and site shall kept clean from all such disposable materials; grease, cotton and other wastes construction materials will be disposed off in shallow soakage wells constructed in each construction site. Such intervals shall not exceed one month under any circumstances. The selection of the disposal site shall be the responsibility of the contractor and he shall ensure that the selected site does not result in any claim for damages to the employer or violation of any existing laws.

Clause. 111.15Compliance with the foregoing will not relieve the contractor of any responsibility for complying with the requirement of any Highway Authority in respect of the roads used by him.

Clause 112.1 GeneralDelete the last sentence and add the following:

Two weeks before undertaking work that would involve any obstruction whatsoever to traffic, the Contractor shall submit a Traffic Control Plan to the Engineer for approval.

The plan shall include:

i. Typical drawings for temporary diversions in accordance with Sub-Clause 112.3

ii.Typical details of arrangements for construction under traffic including details of traffic arrangements proposed to be in place after the cessation of work each day.

Special consideration shall be given in the preparation of the Traffic Control Plan to the safety of pedestrians and workers and delineation of the roadway at night.

Temporary diversions will be constructed only with the approval of the Engineer and will generally be constructed only at bridge sites where new bridges are to be located on the existing road alignment. Road works shall generally be constructed under traffic.

Clause 112.22nd para of this clause shall read as under:

In case of eccentric widening of existing two lane to four lane, the additional two lanes shall be constructed first up to the stage of Dense Bituminous Macadam for a minimum length of 2 km. and traffic diverted to it, and only thereafter the required treatment to the existing carriageway including construction of median shall be taken up.

Clause 121FIELD LABORATORY

Clause 121.1Scope

Delete this Clause and replace with:

The work under this Clause covers the provision and maintenance of a fully equipped laboratory.Clause 121.2Description

Add the following at the end of this Clause:

Within 14 (fourteen) days from date of Start, the Contractor shall prepare detail working drawing of the pucca laboratory building and list of manufacturer/supplier of the equipment and submit the same to the Engineer for his approval.

The Contractor shall construct a fully furnished and adequately equipped field laboratory to the satisfaction of the Engineer. The laboratory will be located at a site approved by the Engineer and must be of adequate size to perform the tests safely as required under the contract including sufficient lights, electricity and water supply. The Contractor shall provide working drawings incorporating all the services based on the information given in the drawings for the approval of the Engineer prior to commencement of construction. An office must be provided in the laboratory for the exclusive use of the Engineer, Engineers representative and Materials Engineer. Adequate toilet and washing facilities must be provided.

The Contractor shall provide the field laboratory within 2 months from the date of the commencement of the work. Prior to this, the contractor must make suitable alternative arrangements as acceptable to the Engineer for testing of materials.

The field laboratory and test records shall be open for use and inspection by the Engineer and/or Employer at any time. All pressure gauges and other machines, equipments and measuring instruments of the laboratory shall be got checked and calibrated regularly as directed by the Engineer by an independent agency and the adjustment certificate shall be furnished to the Engineer. The contractor shall render all reasonable assistance and help in making such checks and tests etc. The cost of all checks and calibrations shall be borne by the contractor. The cost of tests for materials and cubes shall be borne by the contractor.

Clause 121.3Laboratory Equipment

This Clause shall read as under:

The following items of laboratory equipment shall be provided in the field laboratory.

A: General(i)Balance

(a) 7 kg to 10 kg capacity semiself indication Type Accuracy 1 gm Electronic2 Nos

(b) 500 gm capacity semiself indicating Electronic Type Accuracy 0.01 gm.2 Nos.

(c) Pan balance 5 kg capacity Accuracy 0.5 gm.3 Nos.

(d) Platform Scale 300 kg capacity1 No.

(e) Chemical Balance 100 gm. capacity - accuracy 0.0011 No.

(ii) OvensElectrically operated, thermostatically controlled

(a) From 100oC to 220oC Sensitivity 1oC1 No.

(iii) Sieves: as per I.S. 4601962

(a) I.S. Sieves 450 mm internal dia of sieve sets as per ISI of required sieve sizes complete with lid and pan2 Sets

(b) I.S. sieve 200 mm internal dia (brass frame and steel or brass wire cloth mesh) consisting of sieve sets of required sieve sizes complete with lid and pan 2 Sets

(iv)Sieve shaker capable of taking 200 mm and 450 mm dia sieves electrically operated with time switch assembly (As per IS)1 No

(v)Stop watches 1/5 sec. Accuracy2 Nos.

(vi)Glassware comprising of Beakers, Pipettes, dishes, measuring cylinders (100 to 1000 cc capacity) glass rods and funnels, glass thermometers range 0oC to 100oC and metallic thermometers range upto300oC1 Doz

each

(vii)Hot plates 200 mm dia (1500 watt)2 Nos.

(viii)Enamel trays

(a) 600 mm x 450 mm x 50 mm6 Nos.

(b) 450 mm x 300 mm x 40 mm6 Nos.

(c) 300 mm x 250 mm x 40 mm6 Nos.

(d) Circular plates of 250 mm dia6 Nos

(x) Water Testing kit1 No.

B: For Soils testing

(i) Water still1 No.

(ii) Liquid limit device with and A.S.T.M grooving tools as per ISI27202 Nos.

(iii) Sampling pipettes fitted with pressure and suction inlets, 10 capacity1 set

(iv) Compaction apparatus(Proctor)as per ISI 2720 (Part 8) complete with collar, base plate and hammer2 Nos.

(v)Modified AASHTO Compaction apparatus as per I.S. 2720 (Part 7) 1974 or Heavy Compaction Apparatus as per IS complete with collar, base plate hammer2 Nos.

(vi)Sand pouring cylinder with conical funnel and tap and complete as per I.S. 2720 (Part 28) 1974 including modified equipment.6 Nos.

(vii)Sampling tins with lids 100 mm dia x 75 mm ht 1/2 kg capacity and miscellaneous items like moisture, tins with lid(50 grams)etc.24 Nos.

(viii)Lab C.B.R. testing equipment for conducting CBR testing, load frame with 5 Tonne capacity, electrically operated with speed control as per I.S. 2720 (Part 16), and consisting of following:1 set

(a) CBR moulds 150 mm dia - 175 mm ht. complete with collar, base plate etc.8

(b) Tripod stands for holding dial gauge holder12

(c) CBR plunger with settlement dial gauge holder2

(d) Surcharge weight 147 mm dia 2.5 kg. wt with central hole12

(e) Spacers disc 148 mm dia. 47.7 mm ht. with handle3

(f) Perforated plate (Brass)12

(g) Soaking tank for accommodating 6 CBR moulds

(h) Proving rings of 1000 kg, 2500 kg and 5000 kg capacity1 each

(i) Dial gauges, 25 mm travel - 0.01 mm/division10

(ix)Standard Penetration Test equipment1 No.

(x) Nuclear Moisture Density meter or equivalent1 No.

(xi)Speedy moisture meter complete with chemicals2 Nos.

(xii) Unconfined Compression Test Apparatus1 Set

C: For Bitumen and Bituminous Mixes

(i) Constant temperature bath for accommodating bitumen test specimen, electrically operated and thermo- statically controlled.1 No.

(ii) Penetrometer automatic type, adjustable weight arrangement and needles as per I.S. 1203 19581 No.

(iii)Soxhlet extraction or centrifuge type apparatus complete with extraction thimbles with solvent and filter paper1 No.

(iv) Laboratory mixer including required accessories1 No.

(v) Marshall Compaction apparatus automatically operated as per ASTM 155962 T complete with accessories 1 set

(vi)Distant reading thermometer.1 No.

(vii) Rifle Box 1 No.

(viii) Automatic Asphalt Content Meter1 No.

D For Cement, Cement Concrete and related Materials

(i) Water still1 No.

(ii) Vicat needle apparatus for setting time with plungers, as per I.S. 26919671 No.

(iii) Moulds

a) 150 mm x 300 mm ht cylinder with capping component As reqd.

b) Cubicals150mm, 50cm2 (each size)As reqd

(iv) Concrete permeability apparatus1 No.

(v) High frequency mortar cube vibrator for cement testing1 No.

(vi) Concrete mixer power driven, 1 cu ft capacity1 No.

(vii)Variable frequency and amplitude vibrating table size 1 metre x 1 metre, as per the relevant British Standard1 No.

(viii) Flakiness index test apparatus1 No.

(ix)Aggregate impact test apparatus as per IS 2386 (Part 4) 1963.1 No.

(x)Los Angeles abrasion apparatus as per IS. 2386 (Part 4) 19631 No.

(xi)Flow table as per IS 71219731 No.

(xii)Apparatus for slump test4 Nos.

Apparatus for compacting factor test1 No.

(xiii) Equipment for determination of specific gravity for fine and coarse aggregate as per IS : 2386 (Part 3) 1963.4 Nos.

(xiv) 2000 KN capacity compression testing machine for concrete testing

1000 KN capacity compression testing machine for cement testing with additional dial for flexural testing1 No.

1 No.

(xv) Core cutting machine with 10 cm dia diamond cutting edge2 Nos.

(xvi) Needle vibrator4 Nos.

(xvii) Air entrainment meter1 No.

(xviii) 0.5 Cft, 1 Cft cylinder for checking bulk density of aggregate with tamping rodAs reqd

(xix) Soundness testing apparatus for cement1 set

E.For Control of Profile and Surface Evenness

(i)Total Station1 No.

(ii)Precision automatic level with micrometer attachment2 sets

(iii)Precision staff3 sets

(iv)3 metre straight edge and measuring wedge3 sets

(v)Camber templates 2 lane

(a) Crown type crosssection1 set

(b) Straight run crosssection2 sets

(vi) Steel tape

(a) 5 m long2 sets

(b) 10 m long2 sets

(c) 20 m long2 sets

Clause 121.4Ownership

This Clause shall read as under:

The field laboratory building along with the equipment provided for tests shall be and remain the property of the Contractor. However, the Engineer shall have the right to inspect and use them as and when required. The contractor shall have to remove the equipment at his own cost after issuance of taking over certificate.

Clause 121.5MaintenanceThis Clause shall read as under:

The Contractor shall arrange to maintain the field laboratory including sample store yards in a satisfactory manner until the issue of Taking over Certificate for the complete work. Maintenance includes all activities described in Clause 120.4 and maintenance of equipment including periodical calibration and running of the same including chemicals and consumables.

Clause 121.6 Measurement for Payment

This Clause shall be deleted.Clause 121.7 This clause shall be read as under:

The cost of provision of field laboratory including supply of laboratory equipment and also provision of adequate number of qualified personnel, erection, maintenance and running of laboratory including all consumable like chemicals and reagents shall be deemed to have been included in the contract price.

Clause 201CLEARING AND GRUBBING

Clause 201.1Scope

Delete the last sentence and replace with as under:

Clearing and grubbing shall be performed less than one month in advance of earthwork operations and in accordance with the requirements of these specifications. If any vegetation grows after clearing and grubbing and before earthwork, the Contractor shall repeat the work to the satisfaction of the Engineer without any extra cost. Areas requiring clearing and grubbing shall be determined by the Engineer. "

Clause 201.5 Measurements for payment

Delete the last two sentences in first paragraph and the whole of second and third paragraph. Add the following sentence in first paragraph

Removal of stumps and roots of any trees shall not be measured separately. It shall be considered as incidental to Clearing and Grubbing work.

Clause 201.6Rates

Clause 201.6.1 this clause may be read as under;

The Contract unit rates for the clearings and grubbing shall be payment in full for carrying out the required operations including full compensation for all labour, materials, tools, equipment and incidentals necessary to complete the work. These will include removal of stumps and roots of trees less than 300 mm in girth. Also include removal of stumps and roots of trees of any girth size left over after cutting of trees carried out by another agency. The excavation and back filling to required density, where necessary, and handling, salvaging, piling and disposing of the cleared materials with all lifts and up to a lead of 1000 m shall also be deemed to be included in the Contract unit rate.

The removal from site and disposal of all materials obtained from clearing and grubbing operations, which, in the opinion of the Engineer cannot be used or auctioned, shall be included in the Contract unit rate"

Clause 202.6Measurement for Payment

Add the following items after item (vi):

(vii)Removal of existing drainage spouts

Nos.

(viii)Removal of wearing course

Sqm.

(ix)Removal of Sign boards/Bill boards, Km stones

Nos.

and Guard posts

(x)Pavement edge cutting

Sqm.Clause 202.7RatesDelete the last sentence of the paragraph and replace with:

These will also include excavation and back filling where necessary to the required compaction and for handling, piling and disposal of the dismantled materials with all lifts and leads as specified in Sub-Clause 202.5.

Clause 301 EXCAVATIONS FOR ROADWAY AND DRAINSClause 301.1Scope

Insert the following between the words roadway and side in the second line:

road shoulders, verge, medians.

Clause 301.3.3Excavation - General

Delete the last two sentences of para 5 beginning and ending with:

"If trees were removed by the Engineer", and

"The cost of planting to the work".Clause 301.3.7This Clause shall read as under:

"In works involving widening of existing pavements or providing paved shoulders and hard shoulders, the existing shoulders/verge/median shall be removed to its full width. The subgrade material within 0.5m from the lowest level of the pavement shall be checked for density that should not be less than 97% as per table 300-2. In case the density is found to be less than 97%, then the subgrade shall be loosened, watered and re-compacted as per Clause 305 to a density not less than 97% of maximum dry density determined according to IS:2720 (Part 8). Any unsuitable material encountered in this portion of subgrade shall be removed and replaced with suitable material and compacted in accordance with Clause 305.

While removing the existing shoulders/verge/median, care shall be taken to see that no portion of the existing pavement designated for retention is loosened or disturbed. If the existing pavement gets disturbed or loosened, it shall be dismantled and cut to a regular shape with sides vertical and the disturbed/loosened portion removed completely and re-laid as directed by the Engineer, at the cost of the Contractor.

Clause 301.3.11Disposal of Excavated Materials

Delete this sub-clause and replace with:

All the excavated materials shall be the property of the Employer. Suitable material obtained from the excavation of the roadway, shoulders, verges, drains, cross drainage works, etc. shall be used for:

i)Filling for roadway embankments.

ii)Filling existing pits in the right of way as directed by the Engineer, including leveling and spreading, with all lifts and lead up to 1000m.

iii)For landscaping of the road as directed by the Engineer, including levelling and spreading, with all lifts and lead up to 1000m.

Unsuitable and surplus material, which, in the opinion of the Engineer cannot be used in the works, shall be removed from site by the Contractor and disposed off at the approved location in accordance with all statutory requirements as approved by the Engineer.Clause 301.8Read item (i) of the last para as loosening, excavating and recompacting the loosened material at subgrade.

Read item (v) of the last para as disposal of surplus material beyond initial 1000m lead.

Read unit of item (v) of the last para as cum km in place of cum.Clause 301.9 Rates

Add the following after item (vi):

(vii) The removal from site and disposal of all surplus or unsuitable materials obtained from excavation operations, which, in the opinion of the Engineer cannot be used in the Works, shall be included in the Contract rate.

Clause 301.9.2 This clause shall read as under:

"The contract unit rate for loosening, excavating, spreading and re-compacting at subgrade level shall include full compensation for loosening to the specified depth, removing the loosened soil outside the roadway excavation, rolling the surface below, breaking the clods, spreading the excavated soil in layers, watering where necessary and compacting to the requirements."Clause 305.2.1Physical requirementsReplace the existing table 300-1 by the following:

Table 300-1

DENSITY REQUIREMENTS OF EMBANKMENT AND SUBGRADE MATERIALS.

Sl. No.Type of workEngineering properties of samples remoulded as per IS 2720(part 8)

Max dry density (gm/cc)

Min. Cohesion (Kg/Sq cm)

Min. Angle of internal friction (Degree)

1.Embankments upto 3m height, not subjected to extensive floodingNot less than 1.52--

2.Embankments exceeding 3 m height and upto 6 m heightNot less than 1.60--

3.Subgrade and earthen shoulders / verge / backfillNot less than 1.75--

4.High embankment (embankment exceeding 6 m height)Not less than 1.800.1027(

Notes: Same as those below existing Table

Clause 305.2.1.6Add new sub clause as given below:

305.2.1.6

Materials to be used as subgrade shall have a 4 day soaked CBR value minimum 7% (for Km.134.3 to Km.150) and 10% (for Km. 153 to Km. 204) at the unit weight applicable as per Table 300-2.Clause 305.2.2.2 Borrow Materials

Para 1 of this Clause shall read as under:

"No borrow area shall be made available by the Employer for this work. The arrangement for the source of supply of the material for embankment and subgrade as well as compliance to the different environmental requirements in respect of excavation and borrow areas as stipulated, from time to time, by the Ministry of Environmental and Forest, Government of India and the local bodies, as applicable shall be the sole responsibility of the Contractor."

The Table 300-2 shall read as under:

Table 300-2

Compaction requirements for embankment and subgrade

Sl. No.Type of Work / MaterialRelative Compaction as percentage of maximum laboratory dry density as per IS:2720 (Part 8)

1. Subgrade and earthen shouldersNot less than 97

2. Embankment

a) Up to 6 m height

b) exceeding 6 m heightNot less than 95

Not less than 95

3. Expansive clays

a) Subgrade and 500 mm portion just below the subgrade

b) Remaining portion of embankmentNot Allowed

Not less than 90

Para 8 of this Clause given below Table 3002 shall read as under:

"The contractor shall at least 7 working days before commencement of Compaction submit the following to the Engineer for approval:

i) The Values of maximum dry density and optimum moisture content obtained in accordance with IS: 2720 (Part 8) for each fill material he intends to use.

ii) The graphs showing values of density plotted against moisture content from which each of the values in (i) above of the maximum dry density and optimum moisture content were determined.

iii) The dry densitymoisture contentCBR relationship for each of the fill materials he intends to use in the subgrade.

Clause 305.3Construction OperationsClause 305.3.4 Compacting Ground Supporting Embankment/Subgrade

Para 1 of this clause shall read as under:-

Where necessary, the original ground shall be leveled, mixed with water and then compacted by rolling to facilitate placement of 1st layer embankment and its Compaction in accordance with the requirement as given in table 300.2.

Add the following as para 6 at the end:

Wherever pavement reconstruction is proposed, the state of compaction of the existing high embankment fill up to at least 500mm below subgrade bottom level shall be examined by sampling and conducting in-situ density test at every 100m interval at both sides of the embankment. If the degree of compaction of the existing embankment is found to be less than 95% of maximum dry density, determined in accordance with IS: 2720 (Part 8), a depth of minimum 500mm thickness shall be loosened, watered and compacted in accordance with Clause 305.3.5 and 305.3.6 to not less than 95% of maximum dry density, determined in accordance with IS:2720 (Part 8), provided the loosened soil is found suitable as per clause 305.2.

Clause 305.3.6 CompactionInsert in 3rd line of second para of this clause:

15-30 tonne weight having tyre pressure of at least 7 kg./sq.cm in place of adequate capacity capable of achieving required Compactions.

Clause 305.4.3 Earthwork over Existing Road Surface

Replace item (i) with:

If the existing road surface is of a bituminous type and lies more than 500mm below formation level, the same shall be scarified to a depth of 50mm below the underside of the bitumen, or more if specified, so as to provide an ample bond between the old and new material. Where the existing road surface is less than 500mm below formation level, the existing surface shall be prepared for overlay in accordance with Clause 401.4.1

Clause 305.9.1 Insert including removal of top soil after word material appearing in first line of

item (v).

Clause 306 SOIL EROSION AND SEDIMENTATION CONTROLClause 306.4 Measurement for PaymentSubstitute Clause 306.4 as under:

"All temporary soil erosion, sedimentation and pollution control works shall be deemed as incidental to the earthwork and other items of work and as such no separate payment shall be made for the same."

Clause 401 GRANULAR SUBBASEClause 401.2 Materials

Clause 401.2.1 Para 1 of this clause shall read as under:

The material to be used for the work shall be crushed sand, crushed stone, natural sand and combination thereof depending upon the grading required. The material shall be free from organic or other deleterious constituents and conform to Grading I given in Table 400-1 for sub-base layer. Materials like gravel, moorum, crushed concrete, brick metal, kantar or crushed slag shall not be used in sub-base layer.

Clause 401.3The clause shall read as follows:

It shall be ensured prior to actual execution that the material to be used in the sub-base have a minimum CBR value of 30% when compacted and finished.

When directed by the Engineer, this shall be verified by performing CBR tests in the laboratory. The CBR tests shall be conducted on specimen when compacted to 98% of the maximum dry density as per IS: 2720 (Part 8) and soaked for 4 days in water.

Clause 406WET MIX MACADAM SUBBASE/BASE COURSEClause 406.2.1.1 Add at the end of 1st paragraph.

The fraction of material passing through 4.75mm sieve shall be crusher run screening only.

Clause 406.3.3 Preparation of Mix

Delete last sentence of paragraph 1 of Clause 406.3.3.

Clause 406.3.4 Spreading of mix

Substitute first sentence of para 2 of this clause by

The mix shall be spread by a paver finisher.

Clause 408.5.6Add new sub-clause :

408.5.6 After erection, kerbs shall be painted with one coat primer and two coats of colour paint (yellow and black). All paints shall be ready mix oil bound and shall be approved by the Engineer.

Clause 408.7Rates

The clause shall read as under:

The contract unit rates for cement concrete kerb/kerb with channel and foundation for kerb/kerb with channel shall be paid in full compensation for furnishing all materials, labour, tools, equipment for construction, painting and other incidental cost necessary to complete the work.

Clause 409Footpaths and SeparatorsDelete this clause in its entirety and substitute:

Clause 409Footpaths, Medians, Separators and other Paved AreasClause 409.1ScopeThe work shall consist of constructing and finishing footpaths, medians and/or separators and landscaped areas at locations specified in the drawings in conformity with the lines and levels and dimensions as specified in the drawings and/or as directed by the Engineer. The scope of the work shall also include provision of all drainage arrangements within the footpaths as shown on the drawings and/or as directed by the Engineer.

Clause 409.2Surfacing for Footpaths, Medians, Separators and other Paved Areas

Clause 409.2.1 Surfacing TypeThe footpaths, medians, separators and other paved areas shall be constructed with the following type, in accordance with the drawings:

(a)Concrete interlocking paving blocks.

Clause 409.2.2 Materials: GeneralAll materials shall comply with Section 1000 and Section 1700 of the Specifications and as specified here below.

Clause 409.2.3 Sand/Cement MortarSand/cement mortar shall comply with clause 1304 of the Specification, except as described below:

Class 1 mortar shall be mixed in the proportions 1 volume cement to 3 volumes fine aggregate. Water added shall be the least amount, which will yield a mix of suitable consistency suitable for either masonry work or tile bedding.

Clause 409.2.4 Construction Operation: General

All utility diversions within the footpath and/or median and/or other paved areas shall be completed to the satisfaction of the Engineer prior to commencing footpath and other pavement finishing.

All drainage works crossing the footpath and/or median shall be laid to the required slope and connected to the drains/sumps/storm water drain/drainage chutes/gullies etc. as indicated in Drawings and Specifications prior to commencing footpath and other pavement finishing.

Installation of all street lighting traffic sign, traffic signal posts, and other utility appurtenances and roadside barriers shall be completed prior to commencing the footpath and other pavement finishing.

All permanent obstacles within the footpath area, such as manhole covers, shall be adjusted to the correct finished levels prior to commencing footpath and other pavement finishing.

If footpath and/or median finishing is undertaken prior to completion of the adjacent carriageway construction, the contractor shall protect the footpath and/or median finishing from damage from road works operations, and shall take whatever measures as deemed necessary by the Engineer to protect the finished works.

The Contractor shall provide and maintain a temporary surface of compacted granular sub-base material for pedestrians until such time as the permanent finishes are constructed.

Clause 409.3Construction of Footpaths, Medians, Separators and Other Paved Area

Clause 409.3.1 Hydraulically Pressed Pre-Cast Cement Concrete Chequered Paving Tiles

Clause 409.3.1.1 Materials

Pre-cast concrete paving tiles shall be manufactured and tested in accordance with IS: 13801, except as described here below, to the approval of the Engineer.

Pre-cast concrete paving tiles shall be manufactured to the dimensions, patterns and colours indicated in the drawings. The tiles are to be either 250mm or 300mm x 100mm rectangular or any other size and/or shape as shown in the drawings or instructed by the Engineer and shall be hydraulically pressed using a coloured concrete topping not less than 8mm thickness. The pre-cast concrete paving tiles shall have a minimum thickness of 38 mm and shall be laid to the pattern indicated in the drawings.

The tiles shall be manufactured using a minimum of 350 kg cement per cubic metre of mix.

The paving tiles shall be manufactured using approved pigments to the colour indicated on the drawings.

All tiles shall be free from segregation, honey-combing, broken or damaged corners and imperfect plane surface. Correction of any defects by a method of polishing or grouting will not be allowed.

Clause 409.3.1.2 Construction Operation

The tiles shall be laid to the required cross falls on granular sub-base (minimum 150mm thick) laid and compacted in accordance with Clause 401 of the Specification and 25 mm thick concrete of grade M20

The tiles shall be bedded on a layer of Class 1 sand cement mortar of average thickness 12 mm. The tiles shall be immersed in water immediately prior to laying on the mortar bed.

The joints between adjacent tiles, other than expansion joints, shall be of uniform width and not greater than 4mm. All transverse and longitudinal joints shall be in a true line and the finish shall be of a neat and professional appearance. On circular work, tiles shall be radially cut on both edges where necessary to maintain the required line and joint width.

Expansion joints shall be provided through the tiles, tile bedding and concrete foundation at 9 metre spacing along the footpath or median. The joints shall be 6mm wide and filled with bitumen-impregnated fibreboard complying with IS: 1838 (Part1).

The finished footpath shall be lightly vibrated within half an hour of placing the tiles using an approved hand tamper or similar approved method to ensure that the tiles are well bedded with no rocking.

After consolidation, the joints between the tiles shall be filled with Class 1 sand cement mortar to within 3mm of the top surface of the tiles ensuring the minimum of grout comes in contact with the tile face. The joints between the tiles and the adjacent kerbs shall be filled with Class 1 sand/cement mortar.

All foreign matter shall be removed from the pavement areas immediately following the completion of each days work.

Clause 409.4Measurement for Payment

Finishing to footpaths, medians, separators and other paved areas shall be measured in plan in square metres between the inside edge of kerbs, walls and edgings for the complete items of work. No separate items will be made for base concrete or bedding materials or jointing or dividing strips of Alkathene sheets. Separate measurements shall be made for risers of steps, skirting, walls or dado where specified. No deduction shall be made nor any extra payment will be made for any opening in the paving upto 0.1 square meter. Nothing extra shall be paid for paving the area at different levels in the same work area.

Clause 409.5Rates

The contract unit rates for finishing to footpaths, medians, separators and other paved areas and vertical finishing shall be payment in full compensation for furnishing all materials, labour, tools, equipment for construction and other incidental cost necessary to construction of the item of work. Cost of GSB layer, providing pipes and arrangement for their discharge into appropriate drainage channels shall be incidental to the construction of footpaths.

Clause 501.3Mixing

The first sentence of para 1 shall read as under:

Pre-mixed bituminous materials, including bituminous macadam, dense bituminous macadam, semi-dense bituminous concrete and bituminous concrete, shall be prepared in a hot mix plant of batch type of minimum capacity of 100 tonne per hour and capable of yielding a mix of proper and uniform quality with thoroughly coated aggregates.

Clause 501.5.3 Add at the beginning of the 4th para:

The temperature of mix at the time of laying shall be in the range 120oC -145oC.

Clause 501.6Compaction

Replace the eighth sentence of second para beginning "The intermediate rolling.5.6 kg/sq.cm by "The intermediate rolling shall be done with a pneumatic tyred roller of 12-15 tonnes weight having nine wheels, with a tyre pressure of at least 5.6 kg/sq.cm".

Add at the end of 6th para:

"Rolling shall be continued till the density achieved satisfies the requirements of Clause 903.4.2 and all roller marks are eliminated.

Clause 501.8PREPARATION OF SURFACEClause 501.8.3.4 Laying the Profile Corrective Course

Clause 501.8.3.4.1 This Clause shall read as under:

"The surface on which profile corrective course is to be laid shall be thoroughly swept clean of dust and any other extraneous material using mechanical broom and dust collected removed or blown off using compressed air except in places where mechanical means cannot reach.

After preparing the granular surface as in Clauses 501.8.3.1, 501.8.3.2 and 501.8.3.3, the profile corrective course with materials as per Clause 501.8.2.3/501.8.2.4 shall be laid and compacted to the requirement of particular specification Clause. Where a bituminous profile corrective course is to be laid over primed granular surface, a tack coat conforming to Clause 503 shall be applied prior to laying profile corrective course.

Where the profile corrective course is to be laid with Granular sub base and Wet mix macadam, the existing bituminous layer shall be scarified completely with out disturbing the existing granular base. The scarified surface shall be free of loose materials and compacted before laying the profile corrective course. The laying of profile corrective course with granular sub-base and Wet Mix Macadam shall be as per clause 401 and 406 and as per drawing.

Clause 501.8.3.4.2 This Clause shall read as under:

"An existing bituminous surface shall be prepared as per Clauses 501.8.3.3 and 501.8.3.4.1. The bituminous profile corrective course shall be laid after applying tack coat conforming to Clause 503, and compacted to the requirement of specification Clause."

Clause 503TACK COAT

Clause 503.8Rate

This clause shall read as under.

The contract unit rate for tack coat shall be in full for carrying out the required operations including for all components listed in clause 401.8 (i) to (v) and as applicable to the work specified in these specifications. The rate shall cover the provision of tack coat at 0.2kg per square metre for tack coat applied over normal bituminous surface and 0.25 kg per square metre for tack coat applied over dry/ hungry surface or granular surface treated with primer, with the provision that the variance in actual quantity of bitumen used will be assessed and the payment adjusted accordingly.

Clause 504BITUMINOUS MACADAMClause 504.2MaterialsClause 504.2.1 This clause shall read as under:

The Bitumen shall be paving bitumen of Penetration Grade 60/70 as per Indian Standard Specifications for Paving Bitumen IS: 73

Clause 504.2.2Coarse Aggregatesi) Delete the words crushed gravel or other hard material retained on the 2.36 mm sieve from 2nd line of 1st para.

ii) Delete the entire para 3 of Clause 504.2.2

iii) From the table 500-3 delete at the bottom of the table * Aggregate may satisfy requirements of either of these two tests and modify as under:

* Aggregate shall satisfy both the tests values of Los Angeles Abrasion Value and Aggregate Impact Value.

Clause 504. 8RateAdd the words except for the item of tack coat after the words required operations as specified in second line.

Add at the end of para The rate shall include the provision of bitumen, at 3.25 per cent by weight of the total mixture.

Clause 507DENSE GRADED BITUMINOUS MACADAMClause 507.2MaterialsClause 507.2.1 This clause shall read as under:

The Bitumen shall be paving bitumen of Penetration Grade 60/70 as per Indian Standard Specifications for Paving Bitumen IS: 73

Clause 507.2.2Coarse Aggregatesiv) Delete the words from 2nd line of 1st para crushed gravel or other hard material retained on the 2.36 mm sieve.

v) Delete the entire para 2 of Clause 507.2.2

vi) From the table 500-8 delete at the bottom of the table * Aggregate may satisfy requirements of either of these two tests and modify as under:

* Aggregate should satisfy both the tests values of Los Angeles Abrasion Value and Aggregate Impact Value.

Clause 507.3.3 Insert the following paragraph between existing paragraph 3 and 4.

Mix design shall be carried out in accordance with the modified Marshall method described in Asphalt Institute Manual MS-2.

Clause 507.9RateAdd the words except for the item of tack coat after the words required operations as specified in second line.

Clause 509 BITUMINOUS CONCRETE

Clause 509.2.1This clause shall be read as under:

Bitumen shall be paving bitumen of penetration grade 60/70 as per IS Specification for paving bitumen IS-73 and bitumen modifier using crumb rubber (CRMB 55 grade) as per clause 521.

Clause 509.2.4This clause shall read as follows: -

Filler shall consist of finely divided hydrated lime or cement as approved by the Engineer.

Clause 509.2.5 Aggregate Gradation

Add the note below Table 500-18:

"The grading of the aggregate mix as used in work shall be a smooth curve within the approximate parallel of the envelope in Table 500-18".

Clause 509.9Rate

This clause shall read as follows: -

The contract unit rate shall be as specified in clause 507.9, except that the rate shall include the provision of bitumen or modified bitumen at 5.0 percent, by weight of total mixture. The variance in actual percentage of bitumen or modified bitumen used will be assessed and the payment adjusted up or down, accordingly.

Clause 511OPEN-GRADED PREMIX SURFACING

Clause 511.1Open graded Premix Surfacing using Penetration or Cutback Bitumen

Clause 511.1.2.1 the clause shall read as under:The binder shall be paving bitumen of penetration grade 60/70 as per Indian Standard Specifications for paving bitumen IS: 73.

Clause 521MODIFIED BINDER

Clause 521.6Measurement for Payment

This clause read as under

Modified binder supplied in the contract shall not be measured separately. Bitumen layer using modified bitumen shall be included in the particular item of works.

Clause 600CONCRETE PAVEMENT

Clause 601.4SubgradeReplace the word subgrade by Wet mix macadam sub-base in the entire Clause.

Clause 601.5.7Add the following Clause:

Method 'a' shall be adopted. Wet curing shall be done as soon as the curing compound has lost its tackiness. This is mainly done to reduce the temperature of the concrete and avoid temperature induced curling of slabs.

Clause 602.2.3 To be added at the end of the Clause.

"Admixtures containing calcium chloride shall not be used".

Clause 602.3.3.1 The clause is modified as under:

"The pavement quality concrete shall be of M40 grade with a minimum 28 day compressive strength of 40 MPa and a minimum flexural characteristic strength of 4.0 MPa. Quality control in the field shall be exercised on the basis of flexural strength. It may, however, be ensured that the materials and mix proportions remain substantially unaltered during the daily concrete production. The water content shall be minimum required to provide the required workability for full Compaction of the concrete to the required density as determined by the trial mixes. The maximum free water cement ratio shall be 0.45.

Clause 602.3.3.2 The Clause is modified as under:

The ratio between 7 and 28 days strengths shall be established for the mix to be used in the slab in advance from results of the design mix trials. The average flexural strength of the 7 days cured specimens shall be divided by the average flexural strength of the 28 days cured specimens for each batch and the 'R' shall be determined to an accuracy of three decimal places.

If during the construction of the trial length or during normal working, the average value of any four consecutive 7 day test results divided by R falls below (4.0 + 1.65 x standard deviation) MPa, then the Contractor shall stop paving and propose for the approval of the Engineer corrections to the mix to improve the flexural strength. The Contractor shall provide evidence, that the proposed corrections result in the required flexural strength before paving operations may be resumed and producing minimum six beams with the proposed corrected mix and testing these for 7 days flexural strength. No additional payment will be made for any changes to the mix.

Clause 602.5The clause is modified as under:

A separation membrane shall be used between the concrete slab (pavement) and dry lean concrete (DLC), as well as DLC and wet mix macadam. Separation membrane shall be impermeable plastic sheeting 125 micron thick laid flat without creases. It shall be white in colour and transparent. Before placing the separation membrane, the surface at which it is laid shall be swept clean of all the extraneous materials using air compressor. Wherever overlap of plastic sheets is necessary, the same shall be at least 300 mm and any damaged sheeting shall be replaced at the Contractor's expense. The separation membrane may be nailed to the lower layer with nails. There shall be no standing water on or under the separation membrane when concrete is placed upon it.

Clause 602.6.2.1 Replace the first para as follows:

"Transverse joints shall be contraction and expansion joints. Contraction joints shall be provided at 4.5 m intervals, except where the expansion joints are provided. Expansion joints shall be provided at the junction of the approach slabs and bridges and the rigid pavement. Furthermore, transverse joints shall be provided at special locations like transitions to structures, transition to flexible pavements, off carriageway areas as shown on the drawing. The exact position of transverse joints shall be coordinated with adjoining construction packages and shall be proposed by the Contractor in writing for the approval of the Engineer. Transverse joints shall be straight within the following tolerances along the intended line, which is the straight line perpendicular to the longitudinal axis of the carriageway at the position of the joint".

Clause 602.6.4.3 Add a new sub clause as under:602.6.4.3 Joints at the junction of rigid and flexible pavements: Joints shall be provided at the junction of rigid and flexible pavement as shown in drawing.

Clause 602.9.1 Add new paragraph at the end as follows:

"Paving shall be laid in full lane width.

Clause 602.10.2 Add new paragraph at the end.

"All trials shall be carried out using the same paving width and slab thickness as used in the permanent works.

Clause 602.10.5.3 The Clause shall read as under:

In-situ density shall be assessed as described in Clause 903.5.2.2 from at least 3 cores drilled when the concrete is not less than 7 days old. Should any of the cores show honey-combing in the concrete, the trial length shall be rejected and further use of the spreading and compacting unit shall not be permitted until further trials have shown that modification can be made which will result in adequate Compaction.

Clause 602.10.5.5 Add a new sub clause as under:602.10.5.5 Temperature Measurements: The temperature development in the concrete slab during the hardening shall be recorded. The temperature shall be measured in the middle of the slab (vertically) at a horizontal distance of at least 100 mm from any free edge. The temperature shall be recorded every 3 hours and temperature-age relationship shall be determined. The maximum recorded temperature shall not exceed 70(C. If the temperature exceeds 70(C the trial length shall be condemned and the Contractor shall propose methods to reduce the temperature development and carry out a new trial length at his own expense.

Clause 602.11.3.1 Replace the first sentence with the following:

When sealant are applied, an appropriate primer recommended by the manufacturer shall be applied in accordance with their recommendation.

Clause 602.13 The clause shall read as under:

No vehicular traffic (including Contractor's vehicles) shall be allowed on the finished surface until a field flexural strength of minimum 4.0 MPa has been achieved and until the joints are permanently sealed. It is the responsibility of the Contractor to produce a sufficient number of series of test specimens to verify the field flexural strength.

Each series of test specimens for measurement of field flexural strength shall consist of minimum 3 test specimens. The specimens shall be cured at conditions similar to the field conditions. The method for curing and storing of the test specimens in order to simulate field conditions shall be proposed by the Contractor and approved by the Engineer. Prior to opening the road to vehicular traffic the areas adjacent to the pavement shall be completed to a degree that will ensure traffic safety. Opening to traffic shall not constitute a final acceptance of the pavement.

Clause 602.16 Add at the end of existing Clause.

This will also include the cost of supplying and laying of separation membrane as per drawing and technical specification Clause 602.5.

Clause 801 TRAFFIC SIGNSClause 801.1.2 This clause shall read as under;

"All road signs shall be of retro-reflectorised type and made of high intensity grade with encapsulated lens type reflective sheeting vide Clause 801.3, fixed over aluminum sheeting as per these specifications."

Clause 801.5 Add as well as other informatory / any other types of signs after the words for direction and place identification signs in the third line.Clause 803 ROAD MARKINGSClause 803.3Deleted.

Clause 804HECTOMETRE/KILOMETRE STONES

Clause 804.3The first sentence of this Clause shall read as under:

"The hectometre/kilometre stones shall be made of concrete of grade as shown in the drawing".

Clause 901 GENERALClause 901.1 This clause shall read as under:

"All materials to be used, all methods adopted and all works performed shall be strictly in accordance with the requirements of these Specifications. The Contractor shall set up a field laboratory at locations approved by the Engineer and equip the same with adequate equipment as well as qualified and experienced personnel in order to carry out all required tests and Quality Control work as per Specifications and/or as per Clause 121 and/or as directed by the Engineer. The list of laboratory equipment and the facilities to be provided shall be as per Clause 121 and shall be got approved from the Engineer in advance.

Clause 901.5 This Clause shall read as under:

"The Contractor shall provide necessary cooperation and assistance in obtaining the samples for tests and carrying out the field tests as required by the 'Engineer' from time to time. This may include provision of laboratory, equipment, transport, consumables, personnel, including labour, attendants, assistance in packing and despatching and any other assistance considered necessary in connection with the tests."

Clause 903 QUALITY CONTROL TESTS DURING CONSTRUCTIONClause 903.4 Tests on Bituminous ConstructionsIn Table 9004, serial No.6 (xviii) for Density of compacted layer for Dense Bituminous Macadam/Semi Dense Bituminous Concrete/Bituminous Concrete add the following at the end in the frequency column:

"10% of the density tests shall be done on edges."

Clause 1006 CEMENTThe existing Clause shall be deleted and replaced with the clause 302.1 of IRC 21-2000

Clause 1007 COARSE AGGREGATES(i)Delete from the first sentence crushed gravel.. insert material appearing in 4th and 5th line.

(ii)Add the following at the end of the Clause:

"Primary and secondary stone crusher should be employed for getting proper size and grading of coarse aggregates."

Clause 1009.2 Steel for PrestressingThis clause shall read as under:

All prestressing steel shall be of uncoated stress relieved low relaxation seven-ply class 2 strand conforming to IS: 14268

Clause 1009.3 Reinforcement/Un-tensioned steelAdd the following below Table 1000-3:

Note: Thermo Mechanically Treated (TMT) Bars with minimum yield stress of 415 MPa satisfying requirements of IS: 1786 can also be used

Clause 1014 STORAGE OF MATERIALS

Clause 1014.3 Aggregates The following shall be added to this Clause:

"Aggregates shall be stored or stockpiled in such a manner that segregation of fine and coarse sizes will be avoided and also that the various sizes will not become intermixed before proportioning. They shall be stored, stockpiled and handled in such a manner that will prevent contamination by foreign materials."

Section 1100PILE FOUNDATIONS

Clause 1101.2 Add the following at the end of clause 1101.2:

Relevant details of proprietary system of piling shall be included in the bid documents (Refer Schedule: Proprietary Product and Process Information of Bid Documents) and shall be subject to the approval of the Engineer.

The Contractor in his methods statement shall include the procedure for carrying out initial and routine tests of piles including design calculations and drawings. The format for reporting test results shall be included in the methods statement.

Clause 1101.4 Add the following sub-clause

1101.4 Scope of Work

The scope of work shall comprise of the following:

a) Providing all materials including concrete, reinforcing steel, labour, equipment and other incidentals for installation of cast-in-situ bored piles.

b) Initial and routine testing of piles.

c) Integrity testing of piles as per additional specifications provided in Appendix-4 of this Bid Document.

d) Provision of access to movement of Equipment, barricading where necessary, pollution control measures including measures to control noise to minimum acceptable levels and site clearance.

Clause 1503DESIGN OF FORMWORKClause 1503.2 The following shall be added to this Clause"For distribution of load and load transfer to the ground through staging, an appropriately designed base plate must be provided which shall rest on firm substratum".

Clause 1509REUSE OF FORMWORK

This Clause shall read an under:

"After forms are stripped, all materials to be reused shall be thoroughly cleaned. Holes bored through sheathing for form ties shall be plugged by driving in common corks or foamed plastics. Patching plaster may also be used to fill small holes. After cleaning and before refixing, each formwork shall be got approved from the Engineer.

Formwork and staging shall be so used so as to maintain quality of the exposed surface. However, if in the opinion of the Engineer, any particular panel/member has become unsatisfactory for use at any stage, the same will be rejected.

All bent steel props shall be straightened before reuse. The maximum deviation from straightness is 1/600 of length. The maximum permissible axial loads in used props shall be suitably reduced depending upon their condition.

Clause 1703GRADES OF CONCRETE Add the following at the end of this Clause.

The concrete mixes leaner than M15 shall be called as nominal mix concrete.

Nominal mix concrete is that concrete for which, concrete is not to be designed by tests and in which the proportions of materials are in accordance with the drawing and the specification clause mentioned below:

i) All the materials for this concrete shall conform to section 1000 of MORT&H

ii) Minimum cement content and maximum water cement ratio for above said nominal mix concrete shall conform to clause 1703.2 Table 1700-3(A) of MORT&H

iii) Mixing of above said nominal mix concrete shall conform to Clause 1708 of MORT&H

iv) Transporting, Placing and Compaction of above said nominal mix concrete shall conform to clause 1709 of MORT&H.

The Table 1700-1 shall read as under

Grade DesignationSpecified characteristic compressive strength of 150mm cubes at 28 days, in Mpa

M15

M20

M25

M30

M35

M40

M45

M50

M55

M6015

20

25

30

35

40

45

50

55

60

Clause 1704 PROPORTIONING OF CONCRETE Add the following at the end of this Clause.

"In proportioning concrete, the quantity of both cement and aggregate shall be determined by weight. Where the weight of cement is determined by accepting the manufacturer's weight per bag, a reasonable number of bags shall be weighed separately to check the net weight. Where cement is weighed from bulk stock at site and not by bag, it shall be weighed separately from the aggregates. Water shall either be measured by volume in calibrated tanks or weighed. All measuring equipment shall be maintained in a clean, and serviceable condition. Their accuracy shall be periodically checked".

"It is most important to keep the specified watercement ratio constant and at its correct value. To this end, moisture content in both fine and coarse aggregates shall be determined as frequently as possible, frequency for a given job being determined by the Engineer according to the weather conditions. The amount of mixing water shall then be adjusted to compensate for variations in the moisture content. For the determination of moisture content in the aggregates, IS: 2386 (Part III) shall be referred to. Suitable adjustments shall also be made in the weight of aggregates to allow for the variation in weight of aggregates due to variation in their moisture content".

The Table 1700-5 shall read as under

Concrete GradeCurrent Margin

(MPa)Target Mean Strength (MPa)

M15

M20

M25

M30

M35

M40

M45

M50

M55

M6010

10

11

12

12

12

13

13

14

1425

30

36

42

47

52

58

63

69

74

Clause 1704.4 Additional RequirementIn para (a) substitute "0.06%" for "0.1%", "0.06%" for "0.2%; and: 0.1%" for "0.3% for the three items respectively.

Clause 1705 ADMIXTURES This Clause shall read as under:

"Duly tested admixtures/additives conforming to IS: 6925 and IS: 9103 (without replacement of cement) may be used subject to satisfactory proven use, with the approval of the Engineer. Admixtures generating Hydrogen or Nitrogen and containing chlorides, nitrates, sulphides, sulphates and any other material liable to affect the steel or concrete shall not be permitted."

"The general requirements, physical and chemical requirements shall be as per Clause 1012."

Clause 1706Size of Coarse Aggregate Table 17007 in this clause shall read as under:

__________________________________________________

Components Maximum Nominal

size of coarse

Aggregate (mm)

_________________________________________________

i) RCC well curb

20

ii) RCC/PCC well steining

40

iii) Well cap or pile cap

40

Solid type piers & abutments

iv) RCC work in girders, slabs,

20

Kerb, approach slab, piers

And abutments, pier/abutment

caps, piles

v) PSC work

20

vi) PCC in bottom plug and top

40

Plug/intermediate plug

vii) RCC work in wearing coat

12.5

and handrails

viii) Any other work

As specified or

as directed by

the Engineer

___________________________________________________

Clause 1707EQUIPMENT

Para 1 of this Clause shall read as under:

"Unless specified otherwise, equipment for production, transportation and Compaction of concrete shall be as under":

a) For production of concrete.

i) "Batching and mixing of the concrete shall be done only in a concrete batching and mixing plant fully automatic with a minimum capacity of 30 cum. per hour. The plant shall be approved by the Engineer".

ii) In special cases, for culverts, the Engineer may allow mixing of concrete by a diesel or electrically operated mechanical mixer with integrated weigh batching facility having a capacity of 500 litres and automatic water measuring system."

Para 3 of this clause shall read as under:

Measurement of cement + 3 percent of quantity of cement in each batch

Measurement of water + 3 percent of quantity of water in each batch

Measurement of aggregate + 3 percent of quantity of aggregate in each

batch

Measurement of admixture + 3 percent of quantity of admixture in each

batch.

Clause 1709Transporting, Placing and Compaction of Concrete

Add the following paragraph at the end of 2nd para of clause 1709.

For placing Concrete with Pumps: Pipe Lines from the pump to the placing area should be laid out with minimum bends. For large concrete placements standby pumps shall be available. Suitable valves (air release valves, shutoff valves etc.) shall be provided as per site needs. The pumping of concrete shall be preceded by a priming mix to lubricate the pump and pipeline. A rich mix of creamy consistency shall be required for lubricating the pipelines. Continuous pumping shall be done to the extent possible. After concrete has been placed, the pipelines and all related equipment shall be cleaned immediately. A plug sponge ball shall be inserted in the end near the pump and shall be forced through the line by either water or air pressure. Pipes for pumping should not be made from materials which can harm concrete; aluminium alloy pipelines shall not be used.

Clause 1713PROTECTION AND CURING

Clause 1713.1Water CuringAdd the following at the end of para (i).

"Wherever possible, use of water sprinklers or perforated pipes should be encouraged for curing of concrete. Such arrangement must be maintained for a minimum period of 14 days after concreting."

"Approved concrete curing compounds shall be preferred where water curing cannot be done reliably".

Clause 1714FINISHINGAdd the following:

Painting

This work also consists of applying painting to the bridge and retaining wall surfaces where special formwork has been used as presented in Section 1510: Specialized Formwork of these supplemental technical specifications.

Material

Paint for concrete shall consist of a single coat application of epoxy at a thickness of 80-100m dry, as approved by the Engineer.

Paint for steel railing shall consist of a primer coat of metal primer at a rate of 35-45m dry; an intermediate coat of exterior latex or alkyd at 35-50m dry; and a finish coat of exterior latex or alkyd at 35-50m dry, as approved by the Engineer.

Construction Requirements

Refer to Section 1906. Notify the Engineer in writing at least 7 days before beginning operations. Protect adjacent surfaces hat are not to be painted by using tarps, screens, paper, cloth, or other suitable means. Prevent contamination of freshly painted surfaces by dust, oil, grease, or other harmful or deleterious material.

Immediately before painting, prepare the surface according to the following:

(a) Clean the surface to the specified cleanliness level.

(b) Remove dirt, dust, and other contaminants from the surface using methods recommended by the paint manufacturer.

(c) Thoroughly dry the surface.

(d) Determine that the surface temperature is between 10 and 40 C.

(e) Determine that the surface temperature is 3 C or more above the dew point.

(f) Determine that the humidity is 85 percent less, unless specified otherwise on the manufacturer's product data sheet.

Paint Application

Use safe handling practices that conform to the manufacturer's safety data sheet and instructions. Mix and apply paint according to the product instructions. Mix paint with mechanical mixers for a sufficient length of time to thoroughly blend the pigment and vehicle together. Continue the mixing during application. Do not thin paint that is formulated ready for application.

Paint in a neat and workmanlike manner that does not produce excessive paint build-up, runs, sags, skips, holidays, or thin areas in the paint film. Measure the wet film thickness during application and adjust the application rate such that, after curing, the desired dry film thickness is obtained. Apply paint by brush, spray, roller, or any combination thereof if permitted by the manufacturer's product data sheet.

Use brushes that have sufficient bristle body and length to spread the paint in a uniform film. Use round, oval shaped brushes, or flat brushes no wider than 120 millimeters. Evenly spread and thoroughly brush out the paint as it is applied.

Use airless or conventional spray equipment with suitable traps, filters, or separators to exclude oil and water from the compressed air. Use compressed air that does not show black or wet spots. Use the spray gun tip sizes and pressures recommended by the manufacturer.

Use rollers only on flat, even surfaces. Do not use rollers that leave a stippled texture in the paint film.

Use sheepskin daubers, bottle brushes, or other acceptable methods to paint surfaces that are inaccessible for painting by regular means.

Cure each coat of paint according to the manufacturer's recommendations. Correct all thin areas, skips, holidays, and other deficiencies. The Engineer will approve the color before application.

Remove all laitance, dust, foreign material, curing compound, form oil, grease or other deleterious material from the concrete surface.

Remove form oil, grease, or curing compound by washing with a 5 percent solution of trisodium phosphate and rinsing with clean water. Allow the surface to dry completely.

Give the cleaned surface a light abrasive sweep to remove mortar wash or other contaminants. Remove all residue and dust by hand, broom, compressed air or other approved methods.

Apply the coating. Evenly spread and thoroughly work the paint into all corners and recesses.

Payment

The accepted quantities will be paid at the contract price per unit of measurement for pay items listed in the bid schedule. Payment will be full compensation for the work prescribed in this Section.

Clause 1802MATERIALSClause 1802.2SheathingClause 1802.2.1 Delete para 1 to 4 of this sub clause and replace as under:

The sheathing ducts shall conform to clause 3.6 of IRC: 18 as per design consideration & tender drawings drawings.

Clause 1806TENSIONING EQUIPMENTAdd the following at the end:

"Before initial use and subsequently at suitable intervals, the prestressing equipment shall be checked to determine any variation from the normal values during use.

So far as these variations depend upon external influence (e.g. temperature in the case of oil jacks) they shall be taken into account".

Clause 2006 POT BEARINGSClause 2006.1.1 Add the following at the end

Contractor shall furnish the design and the detailed drawings of the bearing based on the load data provided in the drawing for approval of the Engineer prior to commencement of the work.

Clause 2009 MEASUREMENTS FOR PAYMENTAdd the following after para 2.

"Paper bearings shall be measured in square meters".

Clause 2504 Pitching/Revetment on Slopes

The heading of this clause shall read as under:

Pitching/Revetment on slopes and filter media.

Clause 2706 WEEP HOLEThis clause shall read us under:

"Weep holes shall be provided in solid plain concrete/reinforced concrete, brick abutments, earth retaining walls, wing walls, return walls, retaining walls as shown in the drawing or as directed by the Engineer to drive out moisture from the back filling. Weep holes shall be provided with 100 mm dia PVC pipe and shall extend through the full width of concrete with slope of about 1 vertical : 20 horizontal towards the earth face.

The spacing of weep holes shall generally be 1m in either direction or as shown in the drawing with the lowest at about 150 mm above the low water level or ground level whichever is higher or as directed by the Engineer".

SPECIAL TECHNICAL SPECIFICATIONS

B.ADDITIONAL SPECIFICATIONS FOR PARTICULAR ITEM OF WORKS NOT COVERED IN GENERAL TECHNICAL SPECIFICATIONS I.E. THE "SPECIFICATIONS FOR ROAD AND BRIDGE WORKS (LATEST REVISION,)Appendix - 1

ADDITIONAL SPECIFICATION FOR RECYCLING OF BITUMINIOUS PAVEMENT

S-1.0 GENERALThis work shall consist of processing, laying and compaction of the blended materials of reclaimed asphalt pavement (RAP) and virgin aggregate on prepared subgrade in accordance with the requirements of these Specifications.

This work will include removal and reprocessing of existing asphalt pavement, blending with conventional granular aggregate, spreading, shaping, compacting and maintaining the blended sub-base course material to the proper grade, line and cross-sections as shown on the Plans and as provided herein, unless otherwise directed by the Engineer.

S-1.1 MATERIALSThe blended material shall meet the following gradation:

Sieve SizePercent Passing (by weight)

75 mm100%

45 mm90-100%

26.5 mm 55-75%

4.75 mm10-30%

0.075mm