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1、翻譯Lscope1.1Thistestmethodcoversthedeterminationsofdenisty,percentabsorption,andpercentvoidsinhardenedconcrete.1.2Thetextofthistestmethodreferencesnotesandfootnoteswhichprovideexplanatoryinformation.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasre
2、quirementsofthisstandard.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.范圍1.1這個(gè)測(cè)試方法包括密度的確定,吸水率,和硬化混凝土中的孔隙率。1.2這個(gè)測(cè)試方法引用了一些提供解釋信息的文本注釋和腳注。這些注釋和腳注(包括表和數(shù)據(jù)),不應(yīng)當(dāng)視為本標(biāo)準(zhǔn)的要求。1.3以國(guó)際單位值作為標(biāo)準(zhǔn)。2.SignificanceandUse2.1Thistestmethodisusefulindevelopingthedatarequiredfbrconversionsbet
3、weenmassandvolumefbrconcrete.Itcanbeusedtodetermineconformancewithspecificationsfbrconcreteandtoshowdifferencesfromplacetoplacewithinamassofconcrete.3.Apparatus3.1Balance,sensitiveto0.025%ofthemassofthespecimen.3.2Container,suitablefbrimmersingthespecimenandsuitablewirefbrsuspe
4、ndingthespecimeninwater.2.意義和應(yīng)用2.1這個(gè)測(cè)試方法,在開發(fā)混凝土的質(zhì)量和體積之間轉(zhuǎn)換所需的數(shù)據(jù)方面是有幫助的。它可以用來確定符合混凝土規(guī)范,它也可以顯示一,個(gè)混凝土內(nèi)部各處質(zhì)量的差異。3.儀器3.1樣本質(zhì)量精確到0.025%3.2容器(適合浸泡樣本和合適的水位標(biāo)線)4.TestSpecimen4.1Wheneverpossible,thesampleshallconsistofseveralindividualportionsofconcrete,eachtobetestedseparately.Theindividua
5、lportionsmaybepiecesofcylinders,cores,orbeamsofanydesiredshapeorsize,exceptthatthevolumeofeachportionshallbenotlessthan350cm'(orfbrnormalweightconcrete,approximately800g)andeachportionshallbefreefromobservablecracks,fissures,orshatterededges.1.1樣本測(cè)試4.1樣品盡可能由混凝土的幾個(gè)獨(dú)立的部分組成,每個(gè)部分單獨(dú)
6、進(jìn)行測(cè)試。各部分可能是任何所需形狀或大小的一塊柱面,核心,或者束,每個(gè)部分的體積不得少于350cm3(或正常重量的混凝土,大約是800g),并且每個(gè)部分從可觀察到的裂縫、裂縫或破碎的辿緣都應(yīng)當(dāng)是自由。1.1Procedure1.2Oven-DryMass一Determinethemassoftheportions,anddryinanovenatatemperatureof100to110°Cfornotlessthan24h.Afterremovingeachspecimenfromtheoven,allowittocoolindryair(pre
7、ferablyinadesiccator)toatemperatureof20to25°Canddeterminethemass.Ifthespecimenwascomparativelydrywhenitsmasswasfirstdetermined,andthesecondmasscloselyagreeswiththefirst,consideritdry.Ifthespecimenwaswetwhenitsmasswasfirstdetermined,placeitintheovenforaseconddryingtreatmentof24h
8、andagaindeterminethemass.Ifthethirdvaluechecksthesecon