IS 3370-1 (2009): Code of practice Concrete structures for ...

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3 \OAO BIS 2009 BUREAUOFINDIANSTANDARDSMANAKBHAVAN,9 BAHADURSHAHZAFARMARGNEW DELHIIt0002J,tI/(' 2009 PriceGroup7 CementandConcreteSectionalCommittee,CED 2 FOREWORDThisIndianStandard(FirstRevision )wasadoptedby theBureauofIndianStandards,after thedraftfinalizedbytheCementandConcreteS ectionalCommitteehad beenapprovedby the firstpublishedin been taken up with a view tokeepingabreastwith the rapiddevelopmentinthefield ofconstructiontechnologyandconcretedesig nandalsoto thestorageofliquidsareinfluencedby theprevailingconstructionpractices.)

4 Thephysicalpropertiesof thematerialsand lay downuniformrequirementsofstructuresfor thestorageofliquidsgivingdueconsideratio nto theabovementionedfactors,thisstandardhas beenpublishedin four parts, theotherparts in theseriesare:(Part2) :2009 Reinforcedconcretestructures(Part3) : 1967 Prestressedconcretestructures(Part4) : 1967 DesigntableWhilethecommonmethodsofdesign andconstructionhave beencoveredin thisstandard,for designofstructuresofspecialformsor inunusualcircumstances,specialliterature may bereferredto or in suchcasesspecialsystemsofdesignandconstr uctionmay bepermittedonproductionofsatisfactoryevi denceregardingtheiradequacyandsafetybyan alysisor test or thisstandardit has beenassumedthatthedesignofliquidretainin gstructures,whetherofplain.

5 Reinforcedorprestressedconcreteis entrustedto aqualifiedengineerand that theexecutionofthe work iscarriedoutunderthedirectionofa liquidretainingstructuresshouldhave lowpermeability,Thisisimportantnot only for itsdirecteffectonleakagebut alsohecauseit is one of the main factorsinfluencingdurability;resistancet oleaching,chemicalattack,erosion,abrasio nand frostdamage;and ,therefore,incorporatesprovisionsindesig nandconstructionto IS456: 2000'Codeofpracticefor plain andreinforcedconcrete(fourth revision)'andIS 1343.

6 1980'Codeofpracticeforprestressedconcret e(firstrevision)',in so far as they apply, shall bedeemedto form partofthisstandardexceptwhereotherwisela id down in gooddesignandconstructionofstructure,use ofdenseconcrete,adequateconcretecover,go oddetailingpractices,controlofcracking,g oodqualityassurancemeasuresin line with numberofimportantmodificationsandchanges ,the mostimportantof thembeing:a)Scopehas beenclarifiedfurtherbymentioningexclusio nofdams,pipes,pipelines,linedstructuresa nddamp-proofingofbasements,b)Aclauseonex posureconditionhas )Provisionsforconcretehave beenmodifiedin.

7 Iine with IS456:2000withminimumgradeo('concreteasM 20forplaincementconcrete,M30forreinforce dconcreteand M40 forprestressedconcrete(seealsoNote2 underTable I),d)Themaximumcementcontenthas been modified from theearlierrequirementof530kg/rn" to 400kg/m',e)Adau~eon IS456in placeofearlierclauseonprotectionagainstc orrosion,f)Provisionsoncontrolofcracking have beenmodified,(Continuedon third cover) IS 3370(PartI) ( FirstRevision)1 (Part1)laysdowngeneralrequirementsfor the design andconstructionofplain,reinforced storageofliquids, mainly covered in IS 3370(Part2), and IS 3370(Part 3) Thisstandarddoes notcovertherequirementsforconcrete structures for storageofhot liquidsandliquidsoflowviscosity and highpenetratingpowerlike petrol,diesel, oil, etc.

8 Thisstandardalso does notcoverdams,pipes,pipelines, the storageofnon-aqueousliquids and the measuresnecessary wherechemicalattack ispossibleare alsonot dealt with. Therecommendations,however, maygenerallybeapplicableto thestorageatnormaltemperaturesofaqueousl iquidsandsolutionswhichhave nodetrimentalaction onconcreteand steel orwheresufficientprecautionsaretakentoen sureprotectionofconcreteand steel fromdamagedue toaction of suchliquidsas in The cri teria for designofRCCstagingfor overheadwater tanks are given in standards listed in Annex Acontainprovisions,whichthroughreference inthistext, the timeofpublication,the editionsindicatedwerevalid.

9 Allstandardsaresubjectto revision andpartiestoagreementsbased onthisstandardareencouragedtoinvestigate thepossibilityofapplyingthe mostrecenteditionsofthestandards as given Therequirementsformaterialsshall begovernedby IS456and ,such as brick ortile,bloatedclayaggregatesandsinteredf 1yasbaggregates,be allowed forpartsofstructureeitherincontactwith the liquids on any face orenclosingthespaceabovethe tillers,jointsealingcompounds,and waterbarsshallconformto therequirementsofrelevant also not haveanyadverseeffect on thequalityofliquidto thepurposeofthisstandard,partsofthestruc tureretainingthe liquid orenclosingthe space above theliquidshallbeconsideredassubjectto'se vere'conditionas per caseofmembersexposedto 'verysevere'or'extreme'conditions,therel evantprovisionsofIS456shall in IS456and IS1343forconcreteshall apply forreinforcedconcreteandprestressedmembe rsrespectivelysubjectto thefollowingfurtherrequirements.

10 A)Theconcreteshallconformto Table )Thecementcontentnotincludingf1yash andgroundgranulatedblast furnace slag in excessof400kglm) should notbeusedunless specialconsiderationhas been given in design to thinsections,ortoearlythermalcrackingand Theprovisionsfordurabilityshallgenerally be IS 3370(Part1) : 2009 Table 1 MinimumCementContent,MaximumWater-Cement RatioandMinimumGradeorConcrete[ (a)] (I)(2 )(3)(4)(5)i) ) ) :scribedinthis tableis irrespectiveofthepadcsofamelltanditisinc lusiveof addilions menlioned groundgranulatedblastfwnaccslagmaybetake nintoIIC':OUDIin!