【英文版】課件：超聲-回彈綜合法檢測(cè)混凝土強(qiáng)度課件講解

超聲—回彈綜合法檢測(cè)混凝土強(qiáng)度StructuralinspectionofbuildingengineeringTestingconcretestrengthbyultrasonic-reboundcompositemethodDataprocessing目錄一檢測(cè)概述儀器設(shè)備二檢測(cè)方法三數(shù)據(jù)處理四DirectoryOneDetectionoverviewTwoInstrumentandequipmentThreeDetectionmethodFourDataprocessing一檢測(cè)概述OneDetectionoverviewprinciple超聲儀回彈儀在結(jié)構(gòu)混凝土同一測(cè)區(qū)分別測(cè)量聲時(shí)值T和回彈值R用已建的測(cè)強(qiáng)公式推算該測(cè)區(qū)混凝土強(qiáng)度的一種非破損方法適用條件與回彈法基本相同檢測(cè)概述原理DetectionoverviewprincipleReboundmeterUltrasonicinstrumentTheacoustictimevalueTandthereboundvalueRwererespectivelymeasuredinthesamemeasuringareaofstructuralconcrete.Anondestructivemethodforcalculatingthestrengthofconcreteinameasuredareausingestablishedstrengthformulas.Theapplicationconditionsarebasicallythesameasthereboundmethod.標(biāo)準(zhǔn)規(guī)范檢測(cè)概述《混凝土結(jié)構(gòu)工程施工質(zhì)量驗(yàn)收規(guī)范》(GB50204-2015)《超聲回彈綜合法檢測(cè)混凝土抗壓強(qiáng)度技術(shù)規(guī)程》(T/CECS02-2020)DetectionoverviewStandardspecificationCodeforAcceptanceofConstructionQualityofConcreteStructureEngineering(GB50204-2015)TechnicalSpecificationforTestingCompressiveStrengthofConcretebyUltrasonicReboundComprehensiveMethod(T/CECS02-2020)二儀器設(shè)備TwoInstrumentandequipment儀器設(shè)備混凝土超聲波檢測(cè)儀數(shù)顯混凝土回彈儀

InstrumentandequipmentUltrasonicdetectorforconcreteDigitaldisplayconcretereboundinstrument三檢測(cè)方法ThreeDetectionmethod現(xiàn)場(chǎng)檢測(cè)抽檢數(shù)量、儀器校準(zhǔn)準(zhǔn)備工作選擇構(gòu)件、布置測(cè)區(qū)測(cè)區(qū)布置超聲測(cè)試、讀取聲時(shí)值超聲測(cè)試Reboundtest回彈測(cè)試彈擊構(gòu)件、讀取回彈值FieldinspectionPreparatoryworkSurveyarealayoutUltrasonictestSamplingofquantity,instrumentcalibrationSelectthecomponent,arrangethetestareaBouncethecomponent,readthereboundvalueUltrasonictesting,readingsoundtimevalue現(xiàn)場(chǎng)檢測(cè)測(cè)區(qū)布置回彈測(cè)試超聲測(cè)試準(zhǔn)備工作抽檢數(shù)量同批構(gòu)件構(gòu)件抽樣數(shù)不少于30％不少于10個(gè)構(gòu)件組成樣本單個(gè)構(gòu)件測(cè)區(qū)不少于10個(gè)網(wǎng)格面積宜為400cm2小構(gòu)件測(cè)區(qū)數(shù)不少于5個(gè)《超聲回彈綜合法檢測(cè)混凝土抗壓強(qiáng)度技術(shù)規(guī)程》(T/CECS02-2020)FieldinspectionPreparatoryworkSurveyarealayoutReboundtestUltrasonictestTechnicalSpecificationforTestingCompressiveStrengthofConcretebyUltrasonicReboundComprehensiveMethod(T/CECS02-2020)BatchmemberIndividualmemberThesamplenumberofcomponentsshallnotbelessthan30%Nolessthan10componentsconstitutethesampleNolessthan10testareasThemeshareashouldbe400cm2SmallcomponentThenumberoftestareasshallnotbelessthan5現(xiàn)場(chǎng)檢測(cè)測(cè)區(qū)布置回彈測(cè)試超聲測(cè)試準(zhǔn)備工作建筑結(jié)構(gòu)抽樣檢驗(yàn)的小樣本容量檢測(cè)批容量檢測(cè)類別和樣本最小容量檢測(cè)批容量檢測(cè)類別和樣本最小容量ABCABC2～8223801～120032801259～152351201～32005012520016～253583201～100008020031526～50581310001～3500012531550051～905132035001～15000020050080091～15082032150001～5000003158001250151～280133250＞5000050012502000281～500205080注：檢測(cè)類別A適用于一般施工質(zhì)量的檢測(cè)，檢測(cè)類別B適用于結(jié)構(gòu)質(zhì)量或性能的一般檢測(cè)，檢測(cè)類別C適用于結(jié)構(gòu)質(zhì)量或性能的嚴(yán)格檢測(cè)或復(fù)檢GB/50344-20014《建筑結(jié)構(gòu)檢測(cè)技術(shù)標(biāo)準(zhǔn)》P13表3.3.13FieldinspectionPreparatoryworkSurveyarealayoutReboundtestUltrasonictestSmallsamplesizeforsamplinginspectionofbuildingstructuresTestbatchcapacityTestcategoryandsampleminimumsizeTestbatchcapacityTestcategoryandsampleminimumsizeNote:TestclassAisapplicabletogeneralconstructionqualitytest,testclassBisapplicabletogeneralinspectionofstructuralqualityorperformance,andtestclassCisapplicabletostrictinspectionorreinspectionofstructuralqualityorperformanceGB/50344-20014"TechnicalStandardforInspectionofBuildingStructures"P13Table3.3.13現(xiàn)場(chǎng)檢測(cè)測(cè)區(qū)布置回彈測(cè)試超聲測(cè)試準(zhǔn)備工作Ultrasonicmeasuringpoint20cm20cm回彈測(cè)點(diǎn)超聲測(cè)點(diǎn)測(cè)區(qū)不少于10個(gè)網(wǎng)格面積宜為400cm2單個(gè)構(gòu)件超聲波測(cè)點(diǎn)每個(gè)測(cè)區(qū)設(shè)置3個(gè)回彈測(cè)點(diǎn)設(shè)置16個(gè)FieldinspectionPreparatoryworkSurveyarealayoutReboundtestUltrasonictestReboundpointUltrasonicmeasuringpointIndividualmemberNolessthan10testareasThemeshareashouldbe400cm2Ultrasonicmeasuringpointsaresetup3ineachmeasuringarea16rebounddetectionpointsareset現(xiàn)場(chǎng)檢測(cè)測(cè)區(qū)布置回彈測(cè)試超聲測(cè)試準(zhǔn)備工作回彈儀的軸線應(yīng)始終垂直于混凝土檢測(cè)面，并緩慢施壓，準(zhǔn)確讀數(shù)，快速?gòu)?fù)位。每一測(cè)區(qū)應(yīng)記取16個(gè)回彈值，每一測(cè)點(diǎn)的回彈值讀數(shù)精確至1。測(cè)點(diǎn)不應(yīng)在氣孔或外露石子上，同一測(cè)點(diǎn)只應(yīng)彈擊1次。測(cè)點(diǎn)均勻分布，相鄰兩測(cè)點(diǎn)的凈距不宜小于20mm。測(cè)點(diǎn)距外露鋼筋、預(yù)埋件的距離不宜小于30mm。FieldinspectionPreparatoryworkSurveyarealayoutReboundtestUltrasonictestTheaxisofthereboundinstrumentshouldalwaysbeperpendiculartotheconcretedetectionsurface,andslowpressure,accuratereading,quickreset.Eachmeasuringareashouldberecorded16reboundvalue,eachpointofthereboundvaluereadingaccurateto1.Themeasuringpointshouldnotbeonthestomaorexposedstone,andthesamemeasuringpointshouldbehitonly1times.Themeasuringpointsareevenlydistributed,andthecleardistancebetweentwoadjacentmeasuringpointsshouldnotbelessthan20mm.Thedistancebetweenthemeasuringpointandtheexposedsteelbarandembeddedpartsshouldnotbelessthan30mm.現(xiàn)場(chǎng)檢測(cè)測(cè)區(qū)布置回彈測(cè)試超聲測(cè)試準(zhǔn)備工作測(cè)試前先進(jìn)行預(yù)熱和調(diào)零；優(yōu)先對(duì)測(cè)或角測(cè)；數(shù)據(jù)穩(wěn)定后讀數(shù)；超聲測(cè)距測(cè)量精確至1mm。FieldinspectionPreparatoryworkSurveyarealayoutReboundtestUltrasonictestPreheatandzerobeforetest;PrioritytosurveyorAngle;Readingsafterdatastabilization;Ultrasonicrangingmeasurementisaccurateto1mm.四數(shù)據(jù)處理FourDataprocessing數(shù)據(jù)處理強(qiáng)度推定構(gòu)件第i個(gè)測(cè)區(qū)的混凝土抗壓強(qiáng)度換算值，可按規(guī)程第5.2節(jié)和第5.3節(jié)的有關(guān)規(guī)定求得修正后的測(cè)區(qū)回彈代表值和聲速代表值后，采用規(guī)程第6.1.2條規(guī)定的測(cè)強(qiáng)曲線換算而得。當(dāng)構(gòu)件所采用的材料及齡期與制定測(cè)強(qiáng)曲線所采用的材料及齡期有較大差異時(shí)，可采用在構(gòu)件上鉆取混凝土芯樣或同條件立方體試件對(duì)測(cè)區(qū)混凝土抗壓強(qiáng)度換算值進(jìn)行修正。StrengthpresumptionTheconversionvalueofconcretecompressivestrengthintheitestareaofamembercanbeobtainedbyusingthestrengthmeasurementcurvestipulatedinArticle6.1.2afterobtainingtherevisedrepresentativevalueofreboundandsoundvelocityinthetestareaaccordingtotherelevantprovisionsinSection5.2and5.3oftheregulation.Whenthematerialandageofthecomponentisquitedifferentfromthatusedintheformulationofthestrengthmeasurementcurve,theconcretecoresamplecanbedrilledonthecomponentorthecubespecimenwiththesameconditiontocorrecttheconvertedvalueoftheconcretecompressivestrengthinthetestarea.

Dataprocessing數(shù)據(jù)處理構(gòu)件的現(xiàn)齡期混凝土強(qiáng)度推定值(fcu,e)應(yīng)符合下列規(guī)定:當(dāng)該結(jié)構(gòu)或構(gòu)件測(cè)區(qū)數(shù)少于10個(gè)時(shí)：當(dāng)該結(jié)構(gòu)或構(gòu)件的測(cè)區(qū)強(qiáng)度值中出現(xiàn)小于10.0MPa時(shí)：當(dāng)該結(jié)構(gòu)或構(gòu)件測(cè)區(qū)數(shù)不少于10個(gè)時(shí)，應(yīng)按下列公式計(jì)算：當(dāng)批量檢測(cè)時(shí)，應(yīng)按下列公式計(jì)算：k——宜取1.645

DataprocessingThepresumedstrengthofconcreteatpresentage(fcu,e)ofthemembershallcomplywiththefollowingrequirements:Whenthenumberofmeasuredareasofthestructureorcomponentislessthan10:Whenthestrengthvalueofthemeasuredareaofthestructureorcomponentislessthan10.0MPa:Whenthenumberofmeasuredareasofthestructureorcomponentisnotlessthan10:Whentestinginbatches,thefoll