is 6441-4 (1972): methods of test for autoclaved …is : 6441 ( part iv ) - 1972 4.2.1 afier 21)...

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Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. इंटरनेट मानक !ान $ एक न’ भारत का +नम-णSatyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” प0रा1 को छोड न’ 5 तरफJawaharlal Nehru “Step Out From the Old to the New” जान1 का अ+धकार, जी1 का अ+धकारMazdoor Kisan Shakti Sangathan “The Right to Information, The Right to Live” !ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह Bharthari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 6441-4 (1972): Methods of Test for Autoclaved Cellular Concrete Products, Part IV: Corrosion Protection of Steel Reinforcement in Autoclave Cellular Concrete [CED 53: Cement Matrix Products]

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Page 1: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete

Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 6441-4 (1972): Methods of Test for Autoclaved CellularConcrete Products, Part IV: Corrosion Protection of SteelReinforcement in Autoclave Cellular Concrete [CED 53:Cement Matrix Products]

Page 2: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete
Page 3: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete
Page 4: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete
Page 5: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete

IS : 6441 ( Part IV ) - 1972

METHODS OF TEST FOR AU7‘O~‘LAVl:L.> CELLULAR CONC~RE’I’L: 1’ROl~lJC’I‘S

m4RT IV CORROSION PROTECTIQN O-F STEEL REINpuRCEME~NT IN -AlJTOCLAVED CELlULAR CONCRETE

Cement and Concrete Sectional Committee, RDC I!

Chairman Refwesenting

DR I-I. C. VISVESVA~~Y.~ Cemrnt Resrarch Institute of India, New Delhi

Members

DR A. S. BHADURI National Test House, Calcutta SHRI.E. K. RAXA~AANDXAN ! Alternate )

Central Buildina Research Institute l CSIR 1. SHRI A. K. CRATTERJI Roorkee -

I,

Central Road Research Institute ( CSIR ), New Delhi

.

DR S. S. REHSI ( Alternate ) DIRECTOR

DR R. K. GEOSH ( Alternate ) DIRECTOR (CSMRS)

DEPUTYDI~ECTOR (CSMRS) ( SHRI K.C. GHOSAL

SERI A. K. BISWAR ( Alternate ) DR R.K.GHosE DRR.R.HATTIANGADI

'SARI P.J. JAWS ( Alternate) JOINT DIRECTOR, STANDARDS

(B&s,',~~ DIRECTOR, STANDARDS ( B & S ) ( Alternate

SHRI S. B.Josar SHRIM.T.KANSE SHRIKARTIK PFUSAD

SHRI S. L. K_~TNUXIA ( A&mate SHRI S.R. KIJJXARXI SHRI M. A. MEHT.~ SH~I O.MCTHACHEN

SUPERINTENDING ENQINEER, 2xl GIllCLE ( Allernale )

SHRI ERACR A. NalX~sn.411 SHRI K. K. NAVRIAR

Central Water & Power Commission, New Delhi Alternate ) Alokudyog Services Ltd, Nrw Delhi

Indian Roads Congress, New Delhi Associated Cement Companies Ltd, Bombay

Research, Designs & Standards Organization Lucknow

) S. B. Joshi & Co Ltd. Bombay Directorate General of Supplies & Disposals Roads Wing, Ministry of Transport & Shipping

) M. N. Dastur & Co ( Private ) Ltd, Calcutta Concrete .4ssoeiation of India, Bombay Central Public Works Department

Institution of Engineers ( India ), Calcuita In personal capacity ( ‘ Ramanalqa’, I1 First Crcscen~

Prrk Road, Gnndhinagar, A&U, Madras )

( Continued on page 2 )

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Page 6: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete

1~:6441 (Part IV j-1972

Aiambels Represcntin,o Indian 1

Srrrc~ Y. R. TANXJA Deputy Director ( Civ Engg ), ISI

Precast CJoncrete Products Subcommittee, DIX 2 : 9

Convener

SHRI M. A. MEI~TA Concrrlr Association of India, Roml)a!

,

SlrRI E. T. ASTIR ( Alternate lo Shri M. A. hichta )

SRRT v. ,,. i\RTlfASOOR , . . . Neyvcli I.ignite Corporation Ltd, Ncyvrli I SHRT ‘r. KA\IA(:IIAXDlL4V ( Alt.?l,ZntC )

S111~1 I-I. B. CIIA’I.Tk:ItJIx IIindustan Block Manufacturing Co Ltd, Calcutta SHRI S. E;. CIIATTP;KJ1~:1.: Hindustan Housing Factory Ltd, New Delhi QEP~JJ:Y ~DIRE:~:ToR, STAN~)AIII,~ Rrscarch, Designs & Standards Organization.

(H&S) I,ucknow .~SSIS&~NT DIRECTOR, STAND-

AEDY ( M/C ) ( Alternate ) DIRECTOR ( CSMRS ) Central Water & Power Commission, New Delhi

DEPUTY DIRECTOR ( CSMRS ) ( Al~crrzatc )

( Confinurd on page 7 ) Part VII

2

MET-HODS OF TES: CELLULAR CON

PART IV CORROSlOh REINFORCEMENT IN AUTO4

0. FOR

0.1 This Indian Standard (Part IV Institution on 21 February 1972, al and Concrete Sectional Committ, Engineering Division Council. 0.2 Autoclaved cellular concrete : developed commercially abroad al this country also. A series of I is being formulated so as to provid in autoclaved cellular concrete. ‘I it desirable to issue a standard f: cellular concrete products for the g

0.3 In the formulation of this sta international co-ordination among in different countries in addition tc in this country.

:0.4 For convenience of reference, autoclaved cellular concrete produ nine parts:

Part I

Part II Part III Part IV

Part V Part VI

Determination moisture canter Determination 1 Determination Corrosion prote cellular concret Determination 1 Strength, ~deforl subject to bendi Strength, deforr subject to lxndi

Page 7: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete

-IS t 6441 ( Part IV ) - 1972

Indian Standard

METHODS OF TEST FOR AUTOCLAVED CELLULAR CONCRETE PRODLJCTS

PART IV CORROSION PROTECTION OF STEEL REINFORCEMENT IN AUTOCLAVED CELL-ULAR C-ONCRETE

0. FOREWORD

0.1 This Indian Standard ( Part IV ) was adopted by the Indian Standards Institution on 21 February 1972, after the draft finalized by the Cement and Concrete Sectional Committee had been approved by the Civil Engineering Division Council.

0.2 Autoclaved cellular concrete is a class of material, which ~has been developed commercially abroad and is in the process of development * in this country also. A series of Indian Standards on cellular concrete is being ~formulated so as to provide guidance in obtaining reliable products in autoclaved cellular concrete. The Sectional Committee has considered it desirable to issue a standard for the methods of test for autoclaved cellular concrete products for the guidance~of manufacturers and users.

-0.3 In the formulation of this standard -due weightage has been given to international co-ordination among the standards and practices prevailing in different countries in addition to relating it to the practices in the field in this country.

0.4 For convenience of reference, ‘Indian Standard methods of test for autoclaved cellular concrete products ’ has been grouped into the following nine parts:

Part I

Part II Part III Part IV

Part V Part VI

~Pilrt VII

Determination of unit weight or bulk density and moisture content Determination of drying shrinkage Determination of thermal conductivity Corrosion protection of steel reinforcement in autoclaved cellular concrete Determination of compressive strength. Strength, deformation and cracking of flexural members subject to bending-short duration loading test Strength, deformation and cracking of flexural members subject to bending-sustained loading test

3

Page 8: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete

IS : 6441( Part IV ) - 1972

Part \:I11 Loading tests for llexural members in diagonal tension

Part IS Jointing of autoclavdd cellular concrete clcrncnts

0.5 In reporting the result of a test mauc in accortlar~cc Ivith tllis standard, if the final value, observed or calculatM, is to bc rouqtled OK, it shall be done in accordance with IS : 2 - 1960*.

1. SCOPE

1.1 This standard ( Part l\- i covers the method for de!ermining the effectiveness of corrosion protection of the reinforcement bars embeddetl in autoclavcd cellular concrete. In t&s ‘method of test the eiFectivcness of corrdsion protection of reinforcemenU bars is determined by exposure Of samples to humid conditions at two rtidely diflercnt temperatures alter- natively. ‘I‘he method is au accelerated test for corrosion under conditions, which arc as close as possible to those cppericnccd in practice.

2. TEST SPECIMENS

2.1 Location of Specimens - -- ‘l’hree tifist speciincns shall bc cut from a complete elcrncllt of the autoclaved cc~lular concr.ete product taken from the current production after exposure tdl the designccl load. ‘I’he specimens shall preferably be evenly distributed over the ~vhole \vidth of the cleincnl; the position of tile test specimens is illutitrated in l’ig. I.

2.2 Shape and Size of Test Specim$ns -The test specimem shal! 1~ 40 X 40 :< 130 113rn prisins with Ihe steel bar positioned centrallv in the prisms. The sljccimens shall 1~ prepared lay careful sa\\ing. i’he end faces :I GO X -&O n1rr1) of the l)ris17is shall be coated with a moisture and vapour barrier, such as cold asphalt or bitumen emulsion ,la);cr coated with a layer of melted asphalt.

2.3 Reference Samples - i:ur each of the test specimen there shall be a reference specimen of the same size as the test specimen and cut from the same reinforcement 1)~ and from a position a’djacent to the test specimen (see Fig. 1 j. ‘I‘llus there sh;lll be three test specimens, cut and treatctl as in 2.1 and 2.2 and three corresponding reference specimens. For reference samples, the concrete around the steel bar and the protective coating on the surface of the bar shall be crushed and removed until the tvhole surface of the steel bar can 1~ \-isually inspected and classified according to 4.1.

3. TESTING EQUIPMENT

3.1 Climatic cabinet where the specimens can he exposed to moisture- saturated air ’ reIntile humidity 90 f 5 percent ‘: , at temperatures alternat- ing every 3 h Setwcen 2.5 & jQC and 55 -+ YC, wth warming-up period of one hour for each temperature.

TEST

TEST SPECIMEN

All dimemion

FIG. 1 TEST SPECIMENS AND REI PROTECTION 01: ST

4. PROCEDURE

4.1 Inspection of Reference Sam] of the reference samples, the wht examined from all sides and the a; noted.

4.2 Rust Exposure of Test Specin be placed in the humidit). cabinet an 25 + 5’C and 55 + 5’C. l~:\wv 24 four cycles \vitll caclk q.clc consisiing

4

Page 9: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete

IS : (1411 ( Part IV ) - 1972

REF ERkNCE .rn SPECIMEN

TEST SPECIMEN J I

1-e REFERENCE BAR AFTER

REMOVAL OF CONCRETE

AND PROTECTIVE COATING

All dimensions in millimeta_s.

FIG. 1 TEST SPECIMENS AND REFERENCE SPECIMEXS FOIC CORROSION PI~OTECTION OP STEEL REINIWRCEMEXT

4. PROCEDURE

4.1 Inspection of Reference Samples - ~rllmcdiatdy a<kr lJqxLrati(Jll

of the reference samples, the whole surface of the steel bars shal’l be examined from all sides and the amount of rust present on 1111: surfxc noted.

5

Page 10: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete

IS : 6441 ( Part IV ) - 1972

4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete material around the reinforcement bars and coating 1~11 the’bars shall be removed, aud the surface of the b;:rs examined in the same hshion in w.hich the reference samples’have been examined.

4.3 Assessing Corrosion -- The corrosion (or the efficacy of rust pro- tecting agent ) of test sl?ecirnen bars shall be estimated by comI)aring with reinforceincnt bars of corresponding reference slIecimens. When the :1ssessn:cnt is made tile bars shall be rotated around their longitudinal axis 20 tllat the entire surface is checked. If reinforcing bars of the test speci- mens are free fro~u rust or show only slight rust ( not rust flakes ) distributed unili)i~nll~ over the bars and do not occu])y rnore than 0 percent of its surf:lcct the ruhl i:rotccting agent is considered s;kti&ctory.

5. REPORT

5.1 ‘l’hc report sllali include the follo:viiig information:

;L: Code designation;

1)) Place, tirue anrl method of s:rinpling; and

~1: Pcrccntitge of rust formation.

6

Page 11: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete

IS: 6441 ( Part IV ) - 1972

DR S. S. Rlrrrsr ( .4l/rrnnte )

Page 12: IS 6441-4 (1972): Methods of Test for Autoclaved …IS : 6441 ( Part IV ) - 1972 4.2.1 Afier 21) cla),s esposurc oC the sl~ecinlerrs in the humidity cabinet, 111~ celluktr concrete

BUREAU OF INDJAN STANDARDS

He_edqoarters:

Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 Telephones: 331 01 31, 331 13 75 Telegrams: Manaksanstha

( Common to all Offices) Regional Offices: Telephone Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg, 331 01 31

NEW DELHI 110002 331 13 75 *Eastern : l/l 4 C. I. T. Scheme VII M, V. I. P. Road, - 36 2499

Maniktola. CALCUTTA 700054 Northern : SC0 445-446, Sector 35-C,

CHANDIGARH 160036 I 21843

3 1641 41 24 42

Southern :mC. I. T. Campus, MADRAS 600113 I 41 25 19 141 2916

twestern : Manakalaya, E9 MIDC, Marol, Andheri ( East 6 32 92 95 BOMBAY 400093

),

&ranch Offices:

‘Pushpak’. Nurmohamed Shaikh Marg, Khanpur.

I 263 48

\ AHMADABAD 380001 2 63 49 SPeenya Industrial Area 1st Stage, Bangalore Tumkur Road I 38 49 55

BANGALORE 560058 38 49 56 Gangotri Complex, 5th Floor. Bhadbhada Road, T. T. Nagar, ’ 6 67 16

BHOPAL 462003 _.._.. - .~~ Plot No. 82/83, Lewis Road, BHUBANESHWAR 751002 5 36 27 53/5 Ward No. 29, R.G. Barua Road, 5th Byelane, 3 31 77

GUWAHATI 781003 5-8-56C L. N. Gupta Marg ( Nampally Station Road ),

HY DERABAD 500001 R14 Yudhister Marg. C Scheme, JAIPUR 302005

23 1083

{ 6 34 71 6 98 32

117/418 B Sarvodaya Nagar, KANPUR 208005 . 2.1 68 76 I 21 82 92

Patliputra Industrial Estate, PATNA 800013 6 23 05 T.C. No. 14/1421. University P.O.. Palayam

TRIVANDRUM 695035 16 21 04 16 21 17

/nspection Offices ( With Sale Point ):

Pushpanjali, First Floor, 205-A West High Court Road, 2 51 71 Shankar Nagar Square, NAGPUR 440010 I

Institution of Engineers ( India ) Building, 1332 Shivaji Nagar, 5 24 35 PUNE 411005

*Sales Office in Celcuttr is at S Chowringher Approach, P. 0. Princep 27 68 00 6trHt. Calcutta 700072

t%lrs Office in Bombay is at Novelty Chambers, &ant Road. 89 66 28 Bombav &OOO7

#Sales Office in Bangalore is at Unity Building, Narasimhersja Square, 22 36 71 Bangslore 660002

Reprography Unit, BIS, New Delhi, India