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时间:2019-02-04
《再生混凝土多孔砖用再生骨料基本性能试验研究》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、学兔兔www.xuetutu.com钎巍全国中文核心期刊再生混凝土多孔砖用再生骨料基本性能试验研究杨伟军,李鹏飞,梁建国(长沙理工大学土木与建筑学院,湖南长沙410114)摘要:再生混凝土多孔砖与再生混凝土相比有混凝土强度要求低、再生骨料利用率高、生产成本低等优点,非常适合再生混凝土技术的推广应用。粒径O~10mm再生骨料基本性能的试验研究是再生混凝土多孔砖性能研究的基础和关键。再生骨料中细骨料比例取85%、90%、95%3个水平,再生骨料中碎砖含量取O、25%、50%、75%、100%5个水平,用全组合的方式在试验室中
2、配制出3个系列共15种再生骨料。按照GB/T14684--2001及GB/T14685--2001对这l5种再生骨料的级配、表观密度、吸水率、压碎指标进行实验。试验结果表明,粒径0~10mill再生骨料随着骨料中碎砖含量的增多,再生骨料的表观密度、吸水率、压碎指标增大:压碎指标与吸水率、压碎指标与表观密度呈正比。这个性质与目前再生粗骨料的规律不同,说明混凝土砖用O~10mm再生骨料的性质不同于再生粗骨料。关键词:再牛混凝土多孔砖;再生骨料;表观密度;吸水率;压碎指标中图分类号:TU522.3文献标识码:A文章编号:100
3、1—702X(2011)03—0015—05ExperimentalstudyonbasicpropertiesofrecycledaggregatefortheproductionofconcreteperforatedbrickYANGWe~un,LIPentfei,LIANG~anguo(SchoolofCivilEngineeringandArchitecture,ChangshaUniversityofScience&Technology,Changsha410114,Hunan,China)Abstract:
4、Recycledconcreteperforatedbrick,comparedwiththerecycledconcrete,havesomeadvantagesoflowconcretestrengthrequirements,highutilizationrateofrecycledaggregateandlowproductioncosts.Soitisidealforthepromotionandapplicationofrecycledconcretetechnology.0-10malsizerangeof
5、thebasicpropertiesofrecycledaggregateisthebasicandkey.oftherecycledconcreteperforatedbrick.Theproportionofrecycledaggregateinthefineaggregatetotakethethreelevelsof85%,90%,95%,andtheproportionofrecycledaggregateinthebrokenbrickstotakethefivelevelsof0,25%,50%,75%,1
6、00%.Atotalof15differenttypesofrecycledaggregateinthreeserieswerepreparedinthelaboratory.Grading,apparentdensity,water.absorptionandcrushingvalueofthese15typesofrecycledaggregateweretextedinaccordancewiththespecificationsofGB/T14684--2001andGB/T14685--2001.Theresu
7、ltsofexperimentshowthatwiththebrokenbrickscontentinrecycledaggregateofsizerange0-10mmincreased,theapparentdensity,waterabsorptionandcrushingvalueincreased;appositivecorrelationbetweencrushingvalueandwaterabsorption,andbetweencrashingvalueandapparentdensitytoo.The
8、sepropertiesaredifferentfromthecurrentresearchofrecycledcoarseaggregate,whichmeansthatthepropertiesofret’vcledaggregateofsizerange0~10mmfor.concretebrickuseisd
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