【英文标准名称】:StandardSpecificationforFunctionalAdditionsforUseinHydraulicCements
【原文标准名称】:水凝水泥用有效添加剂的标准规范
【标准号】:ASTMC688-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:C01.20
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:additions;functional;hydrauliccement;Additives--cement/concrete;Cementmaterials/applications--specifications;Hydrauliccementconcrete--specifications
【摘要】:1.1Thisspecificationcoversmethodstoinvestigatetheeffectivenessofamaterialtobeneficiallychangethepropertiesofhydrauliccementswhenthematerialisincorporatedduringmanufactureofthecement.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Theeffectofadditionsincementmaymarkedlychangepropertiesotherthanthosetheyareintendedtomodify.Thisspecificationisdesignedtotestforsuchchanges.Table1setsforthvaluesforthosepropertiesofcementpastesandmortarsthatwouldpermitajudgmentofthechangeseffectedbyanaddition.Likewise,Table2setsforthsimilarcriteriaforconcrete.Certainadditionsmaybefoundeffectiveformorethanonepurposeasindicatedin3.1.4and3.1.5.TABLE1CriteriaforEvaluatingNeatCementandMortarContainingFunctionalCementAdditionsTestsTypeofAdditionWaterReducingRetardingAcceleratingWater-ReducingandRetardingWater-ReducingandAcceleratingSet-ControlNormalconsistency,deviationfromcontrol,percentagepointsA
x2212;1.0min
+1.0max
+1.0max
x2212;1.0min
x2212;1.0mm
x00B1;1.0max
Standardconsistency(flow)deviationfromcontrol,percentagepointsA
x2212;4.0min
+2.0max
+2.0max
x2212;4.0min
x2212;4.0min
x00B1;2.0max
Settingtime,(Gillmore)deviationfromcontrol,h:min
Initial
Atleast
...
1:00laterB
1:00laterB
...
Notmorethan
1:00earlier
3:30later
1:30earlier