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【英文标准名称】:StandardTestMethodsforInSituMeasurementOfMasonryMortarJointShearStrengthIndex
【原文标准名称】:砖用泥浆粘接剪切强度指数现场测量的标准试验方法
【标准号】:ASTMC1531-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:C15.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:coefficientoffriction;flatjack;insitu;masonry;mortarjoint;nondestructiveevaluation;shearstrength;Coefficientoffriction(COF);Flatjackmethod;In-situinspection/analysis;Jointstrength;Masonrymortar;Nondestructiveevaluation(NDE
【摘要】:ThemasonrymortarjointshearstrengthindexobtainedbythistestmethodisrelatedtothemasonrywallshearstrengthbyarelationshipcontainedwithinAppendixChapter1oftheUniformCodeforBuildingConservation.TheuserofthisstandardiscautionedthattheshearstrengthrelationshipcontainedwithintheUniformCodeforBuildingConservationisanempiricalrelationshipbasedontestsofearly20th-centuryunreinforcedbrickmasonry.Therelationshipassumesthatwallshearstrengthislimitedbyshearofthemortarjointsratherthanshearthroughtheunits.Forhollowungroutedorsolidunitmasonryconstructiontheshearstrengthindexismeasuredonlyforthemortarbedjointsverticallyadjacenttotheunitbeingtested.Whentestinghollowungroutedmasonryconstruction,theshearstrengthindexisbasedonthehorizontalinterfacebetweenthemortarandthetestunitandthemasonryaboveandbelowthetestunit.Inthecaseofmulti-wytheconstruction,themeasuredmortarjointshearstrengthindexisapplicableonlytothewytheinwhichthetestunitislocated;noheadersshallexistimmediatelyaboveorbelowthetestunit.Thecontributionofanyexistingcollarjointmortartothemeasuredshearstrengthindexisneglected,andthismayleadtoanoverestimateoftheshearstrengthindex.ThetestprocedurelistedforMethodAmaybeconductedasanextensionofTestMethodC1197.Thetwo-flatjacktest,conductedinaccordancewithTestMethodC1197,provideshalfoftherequiredtestsetupforMethodA.AtthecompletionoftheMethodAtest,onewouldknowthemeasurednormalcompressivestress,thedeformabilityofthemasonryatthetest,andtherelationshipbetweentheexpectedjointshearstrengthindexandthenormalcompressivestress.1.1Thesetestmethodscoverproceduresforthedeterminationoftheaverageinsitumortarjointshearstrengthindexinexistingunreinforcedsolid-unitandungroutedhollow-unitmasonrybuiltwithclayorconcreteunits.Threemethodsareprovided:1.1.1MethodA(withFlatjacksControllingNormalCompressiveStress)8212;FordeterminingmortarjointshearstrengthindexwhenthestateofnormalcompressivestressatthetestsiteiscontrolledduringthetestusingtheflatjackmethoddescribedinTestMethodC1197.Horizontaldisplacementofthetestunitismonitoredthroughoutthetest.ThetestsetupforMethodAisshowninFig.1.1.1.2MethodB(withoutFlatjacksControllingNormalCompressiveStress)8212;Fordeterminingmortarjointshearstrengthindexwhenusinganestimateofthenormalcompressivestressatthelocationofthetestsite.Horizontaldisplacementofthetestunitisnotmonitoredduringthisprocedure.ThetestsetupforMethodBisshowninFig.2.1.1.3MethodC(withFlatjackApplyingHorizontalLoad)8212;Fordeterminingmortarjointshearstrengthindexusinganestimateofthenormalcompressivestressatthelocationofthetestsite,asshowninFig.3.Horizontaldisplacementofthetestunitisgenerallynotmeasuredduringthisprocedure.1.2Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriorto......
【中国标准分类号】:Q13
【国际标准分类号】:91_080_30
【页数】:7P.;A4
【正文语种】:英语