ASTM C918/C918M-2007 早期抗压强度的测量和后期强度预测用标准试验方法
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【英文标准名称】:StandardTestMethodforMeasuringEarly-AgeCompressiveStrengthandProjectingLater-AgeStrength
【原文标准名称】:早期抗压强度的测量和后期强度预测用标准试验方法
【标准号】:ASTMC918/C918M-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:C09.61
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:抗压强度;早期强度;成熟度;潜在强度;预测强度
【英文主题词】:compressivestrength;early-agestrength;maturity;potentialstrength;projectedstrength
【摘要】:Thistestmethodprovidesaproceduretoestimatethepotentialstrengthofaparticulartestspecimenbaseduponitsmeasuredstrengthatanageasearlyas24h.5Theearly-agetestresultsprovideinformationonthevariabilityoftheconcreteproductionprocessforuseinprocesscontrol.Therelationshipbetweenearly-agestrengthoftestspecimensandstrengthachievedatsomelaterageunderstandardcuringdependsuponthematerialscomprisingtheconcrete.Inthistestmethod,itisassumedthatthereisalinearrelationshipbetweenstrengthandthelogarithmofthematurityindex.Experiencehasshownthatthisisanacceptableapproximationfortestagesbetween24hand28daysunderstandardcuringconditions.Theuserofthistestmethodshallverifythatthetestdatausedtodevelopthepredictionequationarerepresentedcorrectlybythelinearrelationship.Iftheunderlyingrelationshipbetweenstrengthandthelogarithmofthematurityindexcannotbeapproximatedbyastraightline,theprincipleofthistestmethodisapplicableprovidedanappropriateequationisusedtorepresentthenon-linearrelationship.Strengthprojectionsarelimitedtoconcretesusingthesamematerialsandproportionsastheconcreteusedtoestablishthepredictionequation.Note18212;Confidenceintervalsdevelopedinaccordancewith10.2arehelpfulinevaluatingprojectedstrengths.Thistestmethodisnotintendedforestimatingthein-placestrengthofconcrete.PracticeC1074providesproceduresforusingthemeasuredin-placematurityindextoestimatein-placestrength.1.1Thistestmethodcoversaprocedureformakingandcuringconcretespecimensandfortestingthematanearlyage.Thespecimensarestoredunderstandard-curingconditionsandthemeasuredtemperaturehistoryisusedtocomputeamaturityindexthatisrelatedtostrengthgain.1.2Thistestmethodalsocoversaprocedureforusingtheresultsofearly-agecompressive-strengthteststoprojectthepotentialstrengthofconcreteatlaterages.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q14
【国际标准分类号】:91_100_30
【页数】:6P.;A4
【正文语种】:
【原文标准名称】:早期抗压强度的测量和后期强度预测用标准试验方法
【标准号】:ASTMC918/C918M-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:C09.61
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:抗压强度;早期强度;成熟度;潜在强度;预测强度
【英文主题词】:compressivestrength;early-agestrength;maturity;potentialstrength;projectedstrength
【摘要】:Thistestmethodprovidesaproceduretoestimatethepotentialstrengthofaparticulartestspecimenbaseduponitsmeasuredstrengthatanageasearlyas24h.5Theearly-agetestresultsprovideinformationonthevariabilityoftheconcreteproductionprocessforuseinprocesscontrol.Therelationshipbetweenearly-agestrengthoftestspecimensandstrengthachievedatsomelaterageunderstandardcuringdependsuponthematerialscomprisingtheconcrete.Inthistestmethod,itisassumedthatthereisalinearrelationshipbetweenstrengthandthelogarithmofthematurityindex.Experiencehasshownthatthisisanacceptableapproximationfortestagesbetween24hand28daysunderstandardcuringconditions.Theuserofthistestmethodshallverifythatthetestdatausedtodevelopthepredictionequationarerepresentedcorrectlybythelinearrelationship.Iftheunderlyingrelationshipbetweenstrengthandthelogarithmofthematurityindexcannotbeapproximatedbyastraightline,theprincipleofthistestmethodisapplicableprovidedanappropriateequationisusedtorepresentthenon-linearrelationship.Strengthprojectionsarelimitedtoconcretesusingthesamematerialsandproportionsastheconcreteusedtoestablishthepredictionequation.Note18212;Confidenceintervalsdevelopedinaccordancewith10.2arehelpfulinevaluatingprojectedstrengths.Thistestmethodisnotintendedforestimatingthein-placestrengthofconcrete.PracticeC1074providesproceduresforusingthemeasuredin-placematurityindextoestimatein-placestrength.1.1Thistestmethodcoversaprocedureformakingandcuringconcretespecimensandfortestingthematanearlyage.Thespecimensarestoredunderstandard-curingconditionsandthemeasuredtemperaturehistoryisusedtocomputeamaturityindexthatisrelatedtostrengthgain.1.2Thistestmethodalsocoversaprocedureforusingtheresultsofearly-agecompressive-strengthteststoprojectthepotentialstrengthofconcreteatlaterages.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q14
【国际标准分类号】:91_100_30
【页数】:6P.;A4
【正文语种】:
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点击此处下载