ASTM C1092-1994 玻璃加强的混凝土涵管、雨水管和污水管

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【英文标准名称】:Sulphuricacidandoleumforindustrialuse;Determinationoftotalnitrogencontent;Titrimetricmethodafterdistillation
【原文标准名称】:工业用硫酸和发烟硫酸氮总含量的测定蒸馏后滴定法
【标准号】:ISO914-1977
【标准状态】:作废
【国别】:国际
【发布日期】:1977-11
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC47
【标准类型】:()
【标准水平】:()
【中文主题词】:容量分析;氮;含量测定;硫酸;发烟硫酸;化学分析和试验;化学分析
【英文主题词】:volumetricanalysis;chemicalanalysis;sulphuricacid;nitrogen;oleum;determinationofcontent;chemicalanalysisandtesting
【摘要】:Themethodisapplicabletoproductshavingatotalnitrogencontentequaltoorgreaterthan0.05%(m/m).Theprincipleconsistsintheconversionofthenitrogenpresentinatestportiontoammoniabymeansofnascenthydrogen.Distillationandabsorptionoftheammoniainanexcessofstandardvolumetricsulphuricacidsolution,andback-titrationwithastandardvolumetricsodiumhydroxidesolutioninthepresenceofanindicator.-ReplacesISORecommendationR914-1968.
【中国标准分类号】:G10
【国际标准分类号】:
【页数】:4P;A4
【正文语种】:英语


【英文标准名称】:StandardSpecificationforLoadbearingConcreteMasonryUnits
【原文标准名称】:承重混凝土空心砌块的标准规范
【标准号】:ASTMC90-2009
【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】:C15.03
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:absorption;concretemasonryunits;equivalentwebthickness;faceshell;flange;lightweight;linearshrinkage;loadbearing;mediumweight;normalweight;webs;Concreteconstructionmaterials/applications--specifications;Concretemasonryunits-
【摘要】:1.1Thisspecificationcovershollowandsolid(see5.3and5.4)concretemasonryunitsmadefromhydrauliccement,water,andmineralaggregateswithorwithouttheinclusionofothermaterials.Therearethreeclassesofconcretemasonryunits:(1)normalweight,(2)mediumweight,and(3)lightweight.Theseunitsaresuitableforbothloadbearingandnonloadbearingapplications.1.2Concretemasonryunitscoveredbythisspecificationaremadefromlightweightornormalweightaggregates,orboth.1.3Thetextofthisspecificationreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.Note18212;Whenparticularfeaturesaredesiredsuchassurfacetexturesforappearanceorbond,finish,color,orparticularpropertiessuchasdensityclassification,highercompressivestrength,fireresistance,thermalperformanceoracousticalperformance,thesefeaturesshouldbespecifiedseparatelybythepurchaser.Suppliersshouldbeconsultedastotheavailabilityofunitshavingthedesiredfeatures.
【中国标准分类号】:Q14
【国际标准分类号】:91_100_30
【页数】:4P.;A4
【正文语种】:英语