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IS:3868- 1986( Reaffllmed 1991)I ndian St andard

SPECIFICATION FORBROKEN BRICK ( BURNT CLAY )

COARSE AGGREGATE FOR USE INLIME CONCRETE

( Second Rev i si onFirst Reprint FEBRUARY 1992

UDC 666.972.123:691.421-493:691.322

@ Ccqyright 1987BUREAU OF INDIAN STANDARDSMANAK BHAVAN, 9 BAH&XJ R SHAH ZAFAR MARG

NEW DELHI 1102January 1987

( Reaffirmed 1995 )

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IS:306S-1986

I ndi an St andardSPECIFICATlON FOR

BROKEN BRlCK ( BURNT CLAY )COARSE AGGREGATE FOR USE INLIME tONCRETE

( Second Rev i si onBuilding Limes Sktional Committee, BDC 4

ChnLmMSam C. D. THATT~

Au&s

RepesmtingGujarat Engineering Research Institute, Vadodara

hSEABCZI Or?xCEn ( CERI ) ( hmafr toShri C; D. Thatte )Dn S. C. AXLUWAWA National Council for Cement and Building Materials,New DelhiSHRI S. P. S. AEDSA Engineer-in-Chiefs Branch ( Ministry of Dcfence ),New DelhiMAJ v. K. SIIRI (SAR I S. K. BAZWIW= Al l rrnafr ) National Tut How, Calcutta

Smx D. K. Kucvoo ( Aknnok )SHRI N. G. .BACJAK Direcc;f&eneral of Technical Development,SRRI S. K. Gaona ( Alrmvrr )SXRI H. U. BZJLAII Al l ~~~t i ,~owiag Development Associerion,Snnx S. J. BABADUI~ A&u&t )SHRI 8. K. CftAKL4BORTT Housii &?I, Urban Development Corporation,SEBI P. S. SRXVASTAVA ( AIIrrnorr )Sxm S. K. CBAU~PARY Lime Manufacture Association of India,

Dn N. G. Davlr P&wDe!hiCent~~r.~lding Research Institute ( CSIR ),SERI S. K. MALEIOTRA ( Ahntuf~ )DlRECroRJOINT Dmlrcm~ ( Afmatc ) A.P. Engineering I&search Laboratories, HydcrabadDIRlrcToR Central Soil and Materials Research Station,New DelhiDEPVTY D~EIXOR ( Akrmf~ )

I

@ Co& right 1987BURtiU OF INDIAN STANDARk

Thii publication IP protected under the lndion Copyi>hf Acf ( XIV of 1957 ) andreproduction in whole or in part by any means except with written permission of thepublisher shall be deemed to be an infringement of copyright under rbe laicr Act.

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IS : 3068 1986( Ccntimudjrom page 1 )

MCdWS RcprcrmfingHocsrs~ Couarrssrols~~ Rajasthan Housing Board, JaipurRES~DXST ESQIXKER ( .4lfcmatr ).ioucr DIRE~TOF. RE~E.~ROE ( B&S ) Research,. Designs and Standards OrganizationDEPUTY DIRECTOR RESEAROH ( Mimsrry of Railways ), Lucknow( B&S ) ( Alfcm+r )SERI N. .M.&CfnO Dvers Stone Lime Co Pvt Ltd, DelhiSERI H. L. hl*rtwna Builders Association of India, BombaySHRI HARISH CKOHLI (Altmatr)DR S. C. M~unon~Saat Y. R. PRULL Department of Science & Technology, New DelhiCentratahyoad Research Institute ( CSIR ), NewSERI M. L. BEATIA ( ,&matu )DR A. V. R. RAOSHRI J. SEX &PTA ( &kmutc )National Buildings Organization, New DelhiSaat M. V. NAOARAJRAO Publi;pz Department, Government of Madhya- _----SHRI C. V. RAFtD ( d.t@rlUt#)Swr EC. . SmoH Department of Mines & Geology, Government ofSHRIJ. N. K~o~xn ( Altmutr ) Rajasthan, Udaipur

SVPIRIhTENDlNO Emn~xmt Public Works Department, Government of Tamil( PLANh l lFQ 6; DIEIOI ) Nadu, MadrasExstov~rvl: ENOINFXR BUILD-mo CPZNTRErvtsro~ ) ( Aftrrnatr )

Smznrmxwrxo SURVWOR or Central Public Works Department, New DelhiWORKS ( NDZ )SVRP?ZYOR OI WORkS 14

NDZ ) ( &mm&e )SRI1 . VASVDlSh N Khadi & Village Industries Commission, New DelhiSNRI E. RAXACXANDRAN ( Alfrmotr )SBRI G. RAYAN,Director ( Civ Engg ) Dimctor General, IS1 ( Ex-ofio Membn )SU&~

. SARI N. C. BAXDYOPADEYAYDeputy Director ( Civ Engg ). ISI

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IS :306a-1986

Indian StandardSPECIFICATION FORBROKEN BRICK (BURNT CLAY)

COARSE AGGREGATE FOR USE INLIME CONCRETE

( Second Revision )0. FOREWORD

0.1 This Indian Standard ( Second Revision ) was adopted by the Indian.Standards Institution on 30 June 1986, after the draft finalized by theBuilding Limes Sectional Committee had been approved by the CivilEngineering Division Council.0.2 Broken brick ( burnt clay ) is used as coarse aggregate in thepreparation of lime concrete where aggregates derived from naturalsources are not available in plenty or where its cost is prohibitive. It isa good alternative to broken stone where good well-burnt bricks areavailable in sufiicient quantity. It can be used in foundations and otherworks requiring low strength and exposed to less severe conditions ofservice. Coarse aggregates prepared from bricks of varying strength andproperties are used in different parts of the country. To give a rationalapproach for the use of this type of aggregate in structural concrete,-thisstandard has been formulated.0.3 This standard was first published in 1965 and subsequently revisedin 1975. The present revision has been prepared with a view to incor-porating the modifications found necessary in the light of experiencegained during the use of this standard. In this revision, the require-ment of aggregate in respect of bulk density has been incorporated; andthe nominal aperture siz e of the sieves for grading and water absorptionvalue of the aggregates have been modified in addition to some otherminor modifications.0.4 For the purpose of deciding whether a particular requirement ofthis standard is complied with, the final value, observed or calculated,expressing the result of a test, shall be rounded off in accordance withIS : 2-1960*. The number of significant places retained in the roundedoff value should be the same as that of the specified value in thisstandard.

*Rules for rounding off numerical values ( reoi& ).3

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IS : 3868 - 19861. SCOPE1.1 This standard covers the requirements for coarse aggregate preparedfrom broken bricks ( burnt ciay ) for use in lime concrete.2. GENERAL QUALITY2.1 The broken brick coarse .aggregate shall be prepared from thewellioverburnt bricks conforming to class designation 50 and aboveof IS : 107i-1986*: It shall be free from underburnt clay particles,soluble salt and adherent coating of soil or silt.2.2 Brick aggregate should be handled least number of times before beingused in concrete, as repeated handling could result in breaking up andproduction of finer material passing 475 mm IS Sieve. Allowable limitof such material passing 475 mm I S S i eve shall not be more than 5percent.3. PHYSICAL REQUIREMENTS3.1 Grading - The coarse aggregate shall be of the grading specifiedi;96yble 1, when tested for sieve analysis according to IS : 2386 ( Part 1 )-f.

TABLE 1 REQUIREMENTS OF GRADING FOR BROK?ZN BRICECOARSE AGGREGATEIS Ssnrz DESXONA~OH[N~IS:%O(PARTI)-1985 ]

PEROJCKT PA66XXtO( DYMass )75 mm 100

37.5 mm 95-10019-O mm 45-75475 mm o-5

lpecification for test sieves: Part 1 Wire cloth t&t sieves ( f&d r&ion ).3.2 Broken brick coarse aggregate shall also conform to the requirementsgiven in Table 2.4. SAMPLING4.1 The method of sampling shall be in accordance with IS : 2430-1969:.

*Specification for common burnt clay buildirig bricks (fourin ret&m ).*Methods of test for aggregates for concrete: Part 1 Particle size and shape.J Metb0d.s for sampling of aggregates for .concrete.

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IS : 3068 - 1986TABLE 2 REQWREMENTS OF BROXEN BRICK COARSE AGGREGATE

(Ckuse3.2)SL CHARACTERISTICNO.(1) (2)

i) Bulk density, kg/maii) Aggregate impact value, percent,

MtZXiii) Water absorption, percent, MUXiv) Water soluble matter, percent,

Max

REQUIRENEXT REFERENCE TO M~TEODOF TEST(3) (4)

1100-1350 IS :,2$6~( .Part 3 )-50 IS: 564-G197Of20 Appendix A

1 Appendix B*Methods of test for aggregates for concrete: Part 3 Specific gravity, density, voids,absorption and bulkixig.iMethod of test for determining aggregates impact value ofsofi coarse aggregates.

APPENDIX A[ Clause 3.2; and Table 2, Item (iii) ]

METHOD OF TEST FOR DETERMINATION OFWATER ABSORPTION OF AGGREGATEA-l. APPARATUSA-l.1 The apparatus shall consist of a balance of capacity not less than3 kg; readable and accurate to 0.5 g.A-2: SAMPLEA-2.1 A sample of not less than 3 000 g of the aggregate shall be tested.A-3. PROCEDUREA-3.1 The sample shaI1 be screened on a 9.5 mm IS Sieve and washed toremove finer particles and dust. This sample shall be dried in a venti-lated oven at a temperature between 100 to 110C till a constant mass( W1 ), is obtained, and cooled approximately to room temperature. Thedried and cooled sample shall then be placed in a suitable vessel andcovered with distilled water conforming to IS : 1070-1977* at a tempe-rature between 22 and 32C and shall remain immersed for 24 hours.

*Specification for water for general laboratory use ( second mi siun ).5

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IS:3068-1986Any air entrapped in the aggregate or bubbles appearing on its surfaceshall be removed by a gentle agitation with a iod. Tbe taken from the water and any water visible on e sample shall thentRe surface shall berapidly removed by means of a damp cloth. The surface-dried sampleshall then be immediately weighed ( l4~ ).A-4. EVALUATION AND REPORT OF TEST RESULTSA-4.1 The percentage of water absorption of the aggregate shaI1 becalculated as follqws:

Water absorption, percent by mass,after 24-hour immersion in water w2 - Wl= WI -. x 100where

. Wz = mass in g of the sample after 24-hour immersion inwater, andWI = m ass in g of the dry sample.

APPENDIX B[ Cfous~ 3.2; and Tahlc 2, Item (iv) ]

METHOD OF TEST FOR DETERMINATION OF WATERSOLUBLE MATTER OF AGGREGATEB-1. BREPARATION OF SAMPL@B-1.1 About 100 g of the representative sample shall be air-dried andground to pass 150-micron IS Sieve. The material shall be stored in anair-right bottle. .B-2. PROCEDUREB-2.1 25 g of the sample shall be weighed and transferred to a 500-mlbreaker. 100 ml of distilled water conforming to IS : 1070-1977* shallbe added and the contents stirred frequently for three hours. It shall bedecanted through a IGo. 42 Whatman filter paper or equivalent intoa 50%mi graduated flask. The filtrate shall be refiltered, if neces-sary. The filter paper shall be returned to the beaker, 250 ml of dis-tilled water shall be added and the extraction continued for another oneand a half hour. The material on the filter paper shall be washed threetimes with distilled water and filtered. The filtrate and the washingshall be added to the first filtrate in the 500-ml flask and made up to

*Specification for water for general laboratory use ( second et& n ).6

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IS : 3068 - 1986the mark using distilled water. The flask shall be shaken well and200 ml shall be pipetted out to a weighed platinum dish ( or porcelaindish, glazed inside and outside ). The contents of the dish shall beevaporated to dryness, and heated to constant mass at 105 to 110C.R-3. EVALUATION AND REPORT OP. TEST RESULTSB-3.1 The percentage mass of the soluble salt shall be icalculated asfollows:

Soluble salts, percent by mass = 10 Wwhere

W = mass in g of the dried material on the dish.

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BUREAU OF INDIAN SHeadquarters:Manak Bhavan, 9 Bahadur Shah Zafar Marg.Telephones: 331 01 31, 331 13 75Regional Offices:

TANDARDSNEW DELHI 110002Telegrams: Manaksanstha( C

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