ASTM D7172-2006 相对密度(特殊重力)和用红外线对细集料吸收测定的标准测试方法
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【英文标准名称】:StandardTestMethodforDeterminingTheRelativeDensity(SpecificGravity)AndAbsorptionOfFineAggregatesUsingInfrared
【原文标准名称】:相对密度(特殊重力)和用红外线对细集料吸收测定的标准测试方法
【标准号】:ASTMD7172-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D04.51
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:吸收;测定;细集料;重力;红外线;相对密度;试验
【英文主题词】:absorption;aggregate;apparentdensity;apparentrelativedensity;infrared;relativedensity;specificgravity
【摘要】:Bulkrelativedensity(specificgravity)isthecharacteristicgenerallyusedforcalculationofthevolumeoccupiedbytheaggregateinvariousmixturescontainingaggregateincludingPortlandcementconcrete,bituminousconcrete,andothermixturesthatareproportionedoranalyzedonanabsolutevolumebasis.Bulkrelativedensity(specificgravity)isusedinthecomputationofvoidsinaggregateinC1252andC29/C29M.Bulkrelativedensity(specificgravity)determinedonthesaturatedsurfacedry(SSD)basisisusediftheaggregateiswet,thatis,ifitsabsorptionhasbeensatisfied.Conversely,thebulkrelativedensity(specificgravity)determinedontheoven-drybasisisusedforcomputationswhentheaggregateisdryorassumedtobedry.Apparentrelativedensity(specificgravity)pertainstotherelativedensityofthesolidmaterialmakinguptheconstituentparticlesnotincludingtheporespacewithintheparticlesthatisaccessibletowater.Thisvalueisnotwidelyusedinconstructionaggregatetechnology.Waterabsorptionvaluesareusedtocalculatethechangeinthemassofanaggregateduetowaterabsorbedintheporespaceswithintheconstituentparticles,comparedtothedrycondition,whenitisdeemedthattheaggregatehasbeenincontactwithwaterlongenoughtosatisfymostoftheabsorptionpotential.Thelaboratorystandardforabsorptionisthatobtainedaftersubmergingdryaggregateforapproximately24hoursinwater.Aggregatesminedfrombelowthewatertablemayhaveahigherabsorptionwhenused,ifnotallowedtodry.Conversely,someaggregateswhenusedmaycontainanamountofabsorbedmoisturelessthanthe24hourssoakedcondition:Foranaggregatethathasbeenincontactwithwaterandthathadfreemoistureontheparticlesurface,thepercentageoffreemoisturecanbedeterminedbydeductingtheabsorptionfromthetotalmoisturecontentdeterminedaccordingtoC566bydrying.1.1Thistestmethodcoversthedeterminationoftherelativedensity(specificgravity)andabsorptionoffineaggregates.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:4P.;A4
【正文语种】:
【原文标准名称】:相对密度(特殊重力)和用红外线对细集料吸收测定的标准测试方法
【标准号】:ASTMD7172-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D04.51
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:吸收;测定;细集料;重力;红外线;相对密度;试验
【英文主题词】:absorption;aggregate;apparentdensity;apparentrelativedensity;infrared;relativedensity;specificgravity
【摘要】:Bulkrelativedensity(specificgravity)isthecharacteristicgenerallyusedforcalculationofthevolumeoccupiedbytheaggregateinvariousmixturescontainingaggregateincludingPortlandcementconcrete,bituminousconcrete,andothermixturesthatareproportionedoranalyzedonanabsolutevolumebasis.Bulkrelativedensity(specificgravity)isusedinthecomputationofvoidsinaggregateinC1252andC29/C29M.Bulkrelativedensity(specificgravity)determinedonthesaturatedsurfacedry(SSD)basisisusediftheaggregateiswet,thatis,ifitsabsorptionhasbeensatisfied.Conversely,thebulkrelativedensity(specificgravity)determinedontheoven-drybasisisusedforcomputationswhentheaggregateisdryorassumedtobedry.Apparentrelativedensity(specificgravity)pertainstotherelativedensityofthesolidmaterialmakinguptheconstituentparticlesnotincludingtheporespacewithintheparticlesthatisaccessibletowater.Thisvalueisnotwidelyusedinconstructionaggregatetechnology.Waterabsorptionvaluesareusedtocalculatethechangeinthemassofanaggregateduetowaterabsorbedintheporespaceswithintheconstituentparticles,comparedtothedrycondition,whenitisdeemedthattheaggregatehasbeenincontactwithwaterlongenoughtosatisfymostoftheabsorptionpotential.Thelaboratorystandardforabsorptionisthatobtainedaftersubmergingdryaggregateforapproximately24hoursinwater.Aggregatesminedfrombelowthewatertablemayhaveahigherabsorptionwhenused,ifnotallowedtodry.Conversely,someaggregateswhenusedmaycontainanamountofabsorbedmoisturelessthanthe24hourssoakedcondition:Foranaggregatethathasbeenincontactwithwaterandthathadfreemoistureontheparticlesurface,thepercentageoffreemoisturecanbedeterminedbydeductingtheabsorptionfromthetotalmoisturecontentdeterminedaccordingtoC566bydrying.1.1Thistestmethodcoversthedeterminationoftherelativedensity(specificgravity)andabsorptionoffineaggregates.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:91_100_30
【页数】:4P.;A4
【正文语种】:
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