IS 2185-1 (2005): Concrete masonry units, Part 1: Hollow ...

1 Disclosure to Promote the Right To InformationWhereas 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. ! $ ' + - Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge 0 1 ' 5 Jawaharlal Nehru Step Out From the Old to the New 1 + , 1 + Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live !

2 > 0 B Bhart hari N ti atakam Knowledge is such a treasure which cannot be stolen Invent a New India Using Knowledge IS 2185-1 (2005): Concrete masonry units, Part 1: Hollowand solid Concrete blocks [CED 53: Cement Matrix Products]IS2185(Part1):2005 IndianStandardCONCRETEMASONRYUNITS SPECIFICATIONPART1 HOLLOWANDSOLIDCONCRETEBLOCKS(ThirdRevisi on) ; ,9 BAHADURSHAHZAFARMARGNEWDELHI110002 August2005 PriceGroup5 (PartI)(ThirdRevision)wasadoptedbytheBur eauofIndianStandards, Specificationforconcretemasonryunits:Par t1 Hollowandsolidconcreteblocks .AlsoPart2andPart3werebroughtout,Part2co veringlightweightconcretemasonryunitsasr evisionofIS3590:1966 Specificationforloadbearinglightweightco ncreteblocks andPart3coveringaeratedconcretemasonryun itsasrevisionofIS5482:1969 Specificationforautoclavecellularconcret eblocks.

3 Inthesecondrevisionapartfromcovering,hol lowblocksofopencavitytype, :a) ) * ) ,alreadyextensivelyusedinbuildingconstru ctionabroad,islikelytomakeveryconsiderab leheadwayinthiscountrybecauseofmanyadvan tages,suchasdurability,strengthandstruct uralstability,fireresistance,insulation, andsoundabsorption, :a)b)c) ;Fewerjointsresultinconsiderablesavingin mortar-ascomparedtonormalmasonryconstruc tions,andalsoinincreasingthestrengthofth ewall;andThetrueplanesurfacesobtainedobv iatenecessityofplasterforunimportantbuil dingssituatedinlowrainfallareas;evenwhen plasterisusedforanyreason, , , ,partitionsand-panelwalls,asbackingforot hertypesoffacingmaterial,forpiers,plaste rsandcolumns,forretainingwalls,gardenwal ls,chimneysandfireplaces,asfillersinconc retejoistfloorconstruction,andasshatteri ngforbeams, (openandclosedcavity) ,crushedstonesandair-cooledslag.

4 (Continuedonthirdcover) IS2185(Part1):2005 IndianStandardCONCRETEMASONRYUNITS SPECIFICATIONPART1 HOLLOWANDSOLIDCONCRETEBLOCKS(ThirdRevisi on)1SC-OPET hisstandard(Part1)coversthefollowingconc retemasonrybuildingunitswhichareusedinth econstructionofload-bearingandpartitionw alls:a)b)c)HO11OW(openandclosedcavity)lo adbearingconcreteblocks, Hollow (openandcl osedcavity)non-loadbearingconcreteblocks , , , , Aconcretemasonryunit,eitherhollow(openor closedcavity),orsolid(otherthanunitsused forbonding,suchasahalfblock),anyoneofthe externaldimensionofwhichisgreaterthanthe correspondingdimensionofabrickasspecifie dinIS3952, ,toavoidconfusionwithslabsandpanels, Thedensitycalculatedbydividingthemassofa blockbytheoverallvolume, Thedifferencebetweenthelengthofspecimenw hichhasbeenimmersedinwaterandthensubsequ entlydriedtoconstantlength,allunderspeci fiedconditions.

5 Thetotalareaoccupiedbyablockonitsbedding face, TheverticaldimensionoftheexposedfaceofaM ock, (OpenorClosedCavity)Block (opencavity)ordonoteffectivelypassthroug htheblock(closedcavity) , Thedifferencebetweenthelengthofthespecim enwhendriedtoconstantlengthandwhensubseq uentlyimmersedinwater,allunderspecifiedc onditions, SolidBlock Theexternaldimensionofablockatthebedding plane, ,comer,doublecomerorpier,jamb,header,bul lnose,andpartitionblock, , Hollow (openorclosedcavity) [ IS2185(Part1) (lengthanddepthonly) :Length:400,500or600mmHeight:200or100mmW idth:50,75,100,150,200, ,blockshallbemanufacturedinhalflengthsof 200, , , *5mmandvariationinheightandwidthofunits, notmorethan+ ,thefaceshellsandwebsshallbeflaredandtap eredorstraighttapered, ( ) 200mmLength ofWall MinMinMin(1)(2)(3)(4)(5)O100orless252525 ii)100-150252530iii)150-200302530iv) ,oppositefacesshallbeparallel, (OpenandClosedCavity)ConcreteBlockThehol low(openandclosedcavity)con-creteblockss hallconformtothefollowingthreegrades:a)b )GradeA TheseareusedasloadbearingunitsandShallha veaminimumblockdensityof1500 , , , ,8,5, , respectivelyat28days(seeTable2),GradeB Thesearealsousedasloadbearingunitsandsha llhaveablockdensitybetween1100kg/m3and15 00 respectivelyat28days(seeTable2).]

6 GzadeCThesolidconcreteblocksareusedasloa dbearingunitsandshallhaveablockdensityno tlessthan1800 (seeTable2). :a)b)c)d)e)f)g)h)33gradeordinaryPortland cement,conformingtoIS269,43gradeordinary Portlandcement,conformingto1S8112,Portla ndslagcementconformingtoIS455,Portlandpo zzalanacement,flyashbasedconformingtoIS1 484(Part1),Portlandpozzolanacement,calci nedclaybasedconformingtoIS1484(Part2),Su persulphatedcementconformingtoIS6909,Rap idhardeningPortlandcementconformingtoIS8 041,WhitePortlandcementconformingtoIS804 2,-2 IS2185(Part1):2005j)HydrophobicPortlandc ementconformingtoIS8043,andk) ,replacementofcementbyflyashconformingto IS3812(Part1) ,itshallbeensured-thatblendingofflyashwi thcementisasintimateaspossible, (Part2) ( ).

7 , , :a)b)c)Whereaccelerating,waterreducing,a ir-entrainingandsuperplasticizerconformi ngtoIS9103,Waterproofingagentsconforming toIS2645, ;theadditivesoradmixturesshallbeshownbyt estorexperience, , , , ,the blocksshall% , , ,oncelowpressuresteamcuringhasbeendone, ,andproportioningofaggregatesatthetime3 1S2185(Part1) ,slightlyerodingthesurfacebyplayingafine sprayofwateruponit,andbysplitting(splitb lock).Colourmaybeintroducedbyincorporati ngnon-fadingmineralpigmentsinthefacingco ncrete, ; ,however,itisintendedtoplasterconcretema sonry, , ,thefaceorfacesthataretobeexposedshallbe freeofchips,cracks,orotherimperfections, exceptthatifnotmorethan5percentofaconsig nmentcontainsslightcracksorsmallchipping snotlargerthan25mm, ,andtheminimumcompressivestrengthat28day sofindividualunits, ,beingtheaverageofthreeunits, , ,beingtheaverageofthreeunits,whendetermi nedinthemannerdescribedinAnnexG, ( , )TypeGradeDensityofBlockMinimumAverageMi nimumCompressiveCompressiveStrengthofUni tsStrengthofIndividualUnits,kg/m2N/mmzNl mm2(1)(2)(3)(4)(5)A( ) ( ) (openandclosedA( ( ) ) ( ) ( ) ( ) ( ) (3,5)Lessthan1500but3, (5,0) (5.

8 O)C( ) 10 TESTST estsasdescribedinAnnexBtoAnnexGshallbeco nductedonsamplesofunitsselectedaccording tothesamplingproceduregivenin11, ,asampleof20blocksshallbetakenfromeveryl ot/consignmentof5000blocksorpartthereoff romthesamegrade, ,thesampleshallbetakenfromthestackinwhic hcasetherequirednumberofblocksshallbetak enatrandomfromacrossthetopofthestacks, , ( ). ,3blocksshallbesubjectedtothetestforbloc kdensity( ),8blockstothetestforcompressivestrength ( ),3blockstothetestforwaterabsorption( ),and3blockstothetestfordryingshrinkage( )andlatertothetestformoisturemovement( ).Theremaining3blocksshallbereservedforr etestfordryingshrinkageandmoisturemoveme nt, ,among1S2185(Part1):2005thoseinspectedsh allbenotmorethantwo, , , , , , SCERTIFICATET hemanufacturershallsatisfihimselfthatthe masonryunitsconformtotherequirementsofth isstandardand,ifrequested, ,thesamplesshallbetakenbeforeorimmediate lyafterdelivery, ,thecostofthetestsshallbeborneasfollows: a)b)Bythemanufacturerintheeventoftheresu ltsshowingthattheblocksdonotconformtothi sspecification, :a)b)c)Identificationofthemanufacturer;G radeoftheunit[forexampleA( )].

9 AndYearofmanufacture, IS2-185(Part1) :1989383:1970455:1989456:20001489(Part1) :1991(Part2):19912645:19753812(Part1):20 03 ANNEXA(Clause2)LISTOFREFERREDINDIANSTAND ARDST itleSpecificationfor33gradeordinaryPortl andcement~ourthrevision)Specificationfor coarseandfineaggregatesfromnaturalsource sforconcrete(secondrevision)Specificatio nforPortlandslagcement(Jourthrevision)Co deofpracticeforplainandreinforcedconcret e(fourthrevision)SpecificationforPortlan dpozzolanacement:Flyashbased(thirdrevisi on)Calcinedclaybased(thirdrevision)Integ ralcementwaterproofingcompoundsforcement mortarandconcrete(sezondrevision)Pulveri zedfuelash Specification:Foruseaspozzolanaincement, cementmortarandconcrete(secondrevision)I SNo,(Part2):20033952:19886909:19908041:1 9908042:19898043:19898112:19899103:19991 2269.

10 1087 TitleForuseasadmixtureincementmortarandc oncrete(secondrevision)Specificationforb urntclayhollowbricksforwallsandpartition s(secondrevision)Specificationforsupersu lphatedcementSpecificationfor-rapidharde ningPortlandcement(secondrevision)Specif icationforwhitePortlandcement(secondrevi sion)SpecificationforhydrophobicPortland cement(secondrevision)Specificationfor43 gradeordinaryPortlandcementf j&strevision)Specificationforadmixturesf orconcrete(firstrevision)Specificationfo r53gradeordinaryPortlandcementANNEXB( ) , ,widthacrossthetopandbottombearingsurfac esatmidlength, , ,dummyjoints, ,widthandheightofeachspecimen,andthemini mumface-shellandwebthicknessandtotalwebt hicknessin200mmlengthofwallingpercoursea sanaverageforthe20s~ IS2185(Part1):2005c-1 ANNEXC( )METHODFORTHEDETERMINATIONOFBLOCKDENSITY PROCEDURE blockshallthenbeweighedinkilograms( )andthedensityofeachblockcalculatedasfol lows:selectedinaccordancewith10,shallbed riedtoconstantmassinasuitableovenheatedt oMassofblock,inkgapproximately10O ,incm3temperature,thedimensionsofeachblo ckshallbemeasuredincentimetres(tothenear estmillimetre) ( ) (seeNote)oneofwhichisasphericallyseatedb lockthatwilltransmitloadtotheuppersurfac eofthemasonryspecimen, , ( ).