Designation:C1452–00(Reapproved2006)StandardSpecificationforReinforcedAutoclavedAeratedConcreteElements1ThisstandardisissuedunderthefixeddesignationC1452;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversload-bearingandnonload-bearingreinforcedautoclavedaeratedconcrete(AAC)floor,roof,wall,andstairelementsusedascomponentsforbuildingconstruction.Autoclavedaeratedconcreteisacementitousproductbasedoncalciumsilicatehydratesinwhichlowdensityisattainedbytheinclusionofanagentresultinginmacroscopicvoidsandissubjectedtohigh-pressuresteamcuring.InstalledunitscoveredbythisspecificationshallbeprotectedagainstdirectexposuretomoistureusingacoatingmaterialacceptedbytheAACmanufacturer.1.2Therawmaterialsusedintheproductionofautoclavedaeratedconcreteareportlandcement,quartzsand,water,lime,gypsumoranhydrite,andanagentresultinginmacroscopicvoids.Thequartzsandusedasarawmaterialmaybereplacedbyasiliceousfineaggregateotherthansandandusuallyisgroundtoafinepowderbeforeuse.Flyashmaybeusedasasandreplacement.Thebatchedrawmaterialsaremixedto-gethertoformaslurry.Theslurryiscastintosteelmolds.Duetothechemicalreactionsthattakeplacewithintheslurry,thevolumeexpands.Aftersetting,andbeforehardening,themassismachinecutwithhighaccuracyintoelementsofvarioussizes.Theelementsthenaresteam-curedunderpressureinautoclaveswherethematrixistransformedintoasolidcalciumsilicatehydrate.NOTE1—LOIupto12%maybeacceptableforproductionofAACprovidedsupportingtestdataispresentedbythemanufacturer.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareprovidedforinformationonly.2.ReferencedDocuments2.1ASTMStandards:2A82/A82MSpecificationforSteelWire,Plain,forCon-creteReinforcementC22/C22MSpecificationforGypsumC33SpecificationforConcreteAggregatesC144...
