当前混凝土配合比-设计-存在的问-省略-于混凝土配合比选择方法的讨论之一-廉慧珍

Concrete20093233Number3in2009TotalNo.233doi10.3969/j.issn.1002-3550.2009.03.001121.1000842.100000Abstract:BecauseofutilizationlargelyonsuperplastisizerandmineraladmixturesthetraditionalmethodofpresumptivedensityfordesignonmixproportionofconcretecannotbefeasibleingeneraluseMethodbasedonabsolutedriedaggregateresultedindifficultytoqualitycontrolwhichisusedonlyinChinaontheworldMethodofabsolutevolumemustbeusedforcalculatingmixproportionofconcreteandaggregateusedshouldbewithdrysurfaceandsaturatedwater.Qualityofaggregateshavebecomethekeyfactortoaffectingqualityofconcretesignificancemustberecognizedadequate-ly.Whendosageofmineraladmixtureswerechangedthepastetoaggregateratioshouldbekeptconstantforkeepingvolumestabilityofconcrete.Keywords:mixproportionofconcretemethodofabsolutevolumeaggregatewithdrysurfaceandsaturatedwaterequalvolumeofpastegrad-ingandgrainshapeofcoarseaggregate。。。TU528.01A1002-3550200903-0001-05DiscussiononmethodforselectingmixproportionofconcreteproblemsindesignofmixproportionofconcreteLIANHui-zhen1LIYu-lin21.SchoolofCivilEngineeringTsinghuaUniversityBeijing100084China2.ZhonghongshengConstructionQualityCheckupInc.Beijing100000China2008-09-26THEORETICALRESEARCH01918D.Abrams5《》[1]。1932I.Lyse28d28dyxy=-b+ax1a、b。2050BolomyR28=RcACW-!B2、、A、B30~90mmRcR28Rc=1.5~2R28。20%~30%。JGJ55—2002《》BolomyA、B。19701980GB175—77425#32.5C60。、、。。。1“”“”。1m31m3。、0.52400kg/m32450kg/m3。“”———1··1.90~2.40g/cm32.60g/cm33.0g/cm31m3。。。。2。、。100nm。。。2050“”[2]。。。。。。。。。“”。[3]。《》24h。1kg。[3]12。。3“”。。。。。。3。、122··。。。10mm。、。4“”、。2080。40%~42%36%~38%。45%50%20%。20%。4。。1。3.0g/cm32.2g/cm330%37L。。。。0.5730%0.570.810.50.71。。50.351d12%44%26%56%30%3%、17%27%。。。Dunstan60%7d[1]5。57d0.54028d2.20.7090d1.70.543··360d。。。2Dunstan①、②、③-、--②18%~20%。。2“”。“”“”“”、。。。。。。。3。。。1FA00.5020%0.4040%0.30。。。。4。C302。、、89。/%015304560/MPaDCl/10-9cm2/s/MPaDCl/10-9cm2/s3d20.018.414.412.27.828d37.835.328.425.319.328d4.894.353.863.422.7484d3.042.131.501.031.003d20.020.620.820.020.628d37.839.741.938.640.184d3.041.381.310.850.8228d4.893.962.742.302.0521W/C0.400.470.500.570.670.80FA/%01520304050W/B0.50W/C0.500.590.630.710.831.00W/B0.40W/C0.300.350.380.430.500.60W/B0.35W/C0.350.410.440.500.580.70W/B0.304··87③97②。51。2。3。4。[1]ABRAMSD.DesignofconcretemixturesBulletin1[R].StructuralMate-rialsResearchLaboratoryLewisInstitute1918.[2].[M].1957.[3]JGJ52—1992[S].[4]MALHOTRAVM.Cammetinvestigationsdealingwithhigh-volumeflyashconcrete[J].AdvancesinConcreteTechnology1994.[5]DUNSTANMRH.Fly-ashasthefourthconstituentofconcretemix[C]//ProceedingofFourthInternationalConferenceonFlyAshSilicaFumeSlagandNaturalPozzolanainConcrete.IstanbulTurkeyMay1992.[6].[D].2005.1933-。1606100084010-62785836!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!“”。。“”“”。“”“”。。2434.3694.55t。1700t630t2600t。。“”。。。12“”———20035003.6。“”15。、、。9。。45%。、、。“。”30。“”。“”“”。。、、、、。。。10《》。《》5··