作者:标准资料网 时间:2024-05-21 21:24:41   浏览:8245   来源:标准资料网

【英文标准名称】:StandardPracticeforPetrographicExaminationofHardenedConcrete
【原文标准名称】:硬化混凝土的岩相检查的标准实施规程
【标准号】:ASTMC856-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:C09.65
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:硬化的;岩石学;施工材料;混凝土;建筑;试验
【英文主题词】:aggregates;airvoids;alkali-silicareaction;analysis;deterioration;examination;fireeffects;hardenedconcrete;microscopy;paste;petrographic;secondarydeposits
【摘要】:1.1Thispracticeoutlinesproceduresforthepetrographicexaminationofsamplesofhardenedconcrete.Thesamplesexaminedmaybetakenfromconcreteconstructions,theymaybeconcreteproductsorportionsthereof,ortheymaybeconcreteormortarspecimensthathavebeenexposedinnaturalenvironments,ortosimulatedserviceconditions,orsubjectedtolaboratorytests.Thephrase"concreteconstructions"isintendedtoincludeallsortsofobjects,units,orstructuresthathavebeenbuiltofhydrauliccementconcrete.Note18212;Aphotographicchartofmaterials,phenomena,andreactionproductsdiscussedinSections7-12andTable1-6areavailableasAdjunctC856(ADJCO856).1.2Thepetrographicproceduresoutlinedhereinareapplicabletotheexaminationofsamplesofalltypesofhardenedhydraulic-cementmixtures,includingconcrete,mortar,grout,plaster,stucco,terrazzo,andthelike.Inthispractice,thematerialforexaminationisdesignatedas"concrete,"eventhoughthecommentarymaybeapplicabletotheothermixtures,unlessthereferenceisspecificallytomediaotherthanconcrete.1.3outlinesanuranylacetatemethodforidentifyinglocationswherealkali-silicagelmaybepresent.Itisarequirementthatthesubstancesinthoselocationsmustbeidentifiedusinganyothermoredefinitivetechniques,suchaspetrographicmicroscopy.1.4Thepurposesofandproceduresforpetrographicexaminationofhardenedconcretearegiveninthefollowingsections:SectionQualificationsofPetrographersandUseofTechnicians3PurposesofExamination4Apparatus5SelectionandUseofApparatus6Samples7ExaminationofSamples8SpecimenPreparation9VisualandStereomicroscopeExamination10PolarizingMicroscopeExamination11PasteFeatures12Report13