资源描述：
《见证取样方法（witness sampling method）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、见证取样方法（Witnesssamplingmethod）Thewitnesssamplingmethodof.Txt35isawarmcolorofnature,discerningcraftsmentoshowittoperfection;warmisamusicbeatnote,thedelicatefeelingsofthesingerstoexpressitwasreallypuretothecommonlyusedbuildingmaterialwitnesssamplingmethodsummary(reinforc
2、edconcrete,cement,brick,stoneetc.abar),Acceptanceofreinforcementapproach:Thereinforcedapproach,shouldbeinaccordancewiththeexistingnationalstandards"provisionsofreinforcedconcretewithhotrolledribbedbar"GB1499extractionspecimensformechanicaltesting,thequalitymustcomplyw
3、iththerelevantstandardsandregulations.Acceptancemethod:checkproductqualificationcertificate,factoryinspectionreportandincomingreinspectionreport.Samplingmethod:accordingtothesamebatch,thesamespecifications,thesamestovenumber,thesamedate,thesamedeliverystatusbar,thewei
4、ghtofeachbatchofnotmorethan60tforatestbatch,on-sitesampling;whenlessthan60tforanumberofon-siteinspection,sampling.Thespecimensaredividedintotwotensilespecimensandtwocoldbendingspecimens.Inlaboratorytests,atleastonetensilespecimenandonebentspecimenshallbecheckedateachb
5、atch.Specimenlength:mechanicalspecimenlengthismorethan400mm(400~600mm).(Note:whensampling,500~1000mmreinforcementisinterceptedfromanyendofthesteelbarandsampledColddrawnsteelbars:batchinspectionshallbecarriedoutinbatches,andthecolddrawnbarswiththesamediameterofeachbatc
6、hshallbeofthesameclassweightofnotlessthan50t,andshallbetakenasatestbatch.Numberofsamples:twotensilespecimensandtwobentspecimens.Two,steelweldingWeldedsteelinbuildingconstructionisgenerallydividedinto:flashbuttwelding,resistancespotwelding,arcwelding,electroslagwelding
7、,embeddedTtypesubmergedarcpressurewelding,gaspressurewelding.Samplingmethod:1.Flashbuttwelding:inthesameworkingclass,300weldedjointsofthesamegradeandthesamediametershouldbeusedasatestbatchbythesamewelder.Whenlessthan300classesinthesamejointasatestgroup.2.Mechanicalcon
8、nection:inthesameworkingclass,500weldedjointsofthesamegradeandthesamediametershouldbeusedasatestbatchbythesamewelder.Thetens
