矿物掺合料对轻骨料混凝土抗离析性能影响的研究

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1、学兔兔www.xuetutu.com2012年第9期(总第275期)混凝土原材料及辅助物料MATERIALANDADMINICLENumber9in2012(TotalNo．275)Concretedoi：10．3969~．issn．1002—3550．2012．09．024矿物掺合料对轻骨料混凝土抗离析性能影响的研究徐长伟。张阳，杨梦卉。高杰(沈阳建筑大学材料科学与工程学院，辽宁沈阳110168)摘要：通过在轻骨料昆凝~e~nA矿物掺合料，测试其抗压强度、坍落度、扩展度及分层度，研究不同种类矿物掺合料单掺、复掺时，掺合料掺量对轻骨料混凝土力学性能及均质性的影响，分析矿物掺合

2、料对轻骨料混凝土抗离析性能的改善程度。研究结果表明：单掺时，在30％掺量范围内，随着矿渣粉掺量的增加，轻骨料混凝土拌合物的粘聚性增强，拌合物流动性变好，早期和后期强度增加；在20％掺量范围内，随着粉煤灰掺量的增加，轻骨料混凝土拌合物的流动性变好，泌水减小，拌合物均质性变好；当粉煤灰和矿渣粉掺量均为10％时，复合掺加矿渣粉和粉煤灰对配制大流动性高强轻骨料混凝土效果理想，抗离析性优异。关键词：矿物掺合料；抗离析性能；分层度；轻骨料混凝土中图分类号：TU528．041文献标志码：A文章编号：1002—3550(2012)09—0077—04Influenceofminerialbl

3、endingmaterialsonthelightweightaggregateconcreteantisegregationabilityXUChang-wei，ZHANGYang，YANGMeng-hui，GA0Jie(SchoolofMaterialScienceandEngineering，ShenyangJianzhuUniversity，Shenyang110168，China)Abstract：Addingmineralblendingmaterialsintolightweightaggregateconcrete，thecompressivestrength

4、，theslump，expansionandstratificationweretestedandtheeffectofblendingmaterialscontentonmechanicalpropertiesandtheheterogeneityoflightweightaggregateconcretewerestudiedwhendifferenttypesofmineralblendingmaterialssingledoped，doublemixing．Atthesametime，theimprovementdegreeofblendingmaterialsonl

5、ightweightaggregateconcreteantisegregationabilitywereanalysed．Theresultsdenotedthatwhensingle—dopeddosagewaslessthan30％，withtheriseofgroundgranulatedblastfurnaceslagdosage，thecohesivenessoflightweightaggregateconcretemixtureincreased,liquidityofthemixturegrewbetter，andtheearlystrengthandthe

6、laterstrengthofconcretewerebothimproved．Whensingle-dopeddosagewaslessthan20％，withtheriseofflyash，theliquidityandhomogeneityoflightweightaggregateconcretemixturegrewbetter，andthebleedingoftheconcretedecreased．Whenflyashandgroundgranulatedblastfumaceslagdosagewereboth10％，Theadditionofbothgrou

7、ndgranulatedblastfurnaceslagandflyashhadadvanta-geouseffectoncompoundinglightweightaggregateconcretewithhighliquidityandstrengthJtsabilityofanti—segregationwasfavorable．Keywords：mineralblendingmaterial；antisegregationability；stratification；lightweightagg