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页数:7页
时间:2019-02-25
《再生骨料取代率对再生混凝土耐久性的影响》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第29卷第l期建筑科学与工程学报NO.1JournalofArchitectureandCivilEngineeringVo1.292O12年3月Mar.2012文章编号:16732049(2012)01005(;07再生骨料取代率对再生混凝土耐久性的影响应敬伟,肖建庄(1.济大学建筑一r程系,上海200092;2.同济大学先进士术1==程材料教育部重点实验室,f海200092)摘要:在对大量文献进行研究与对比分析的基础上,总结了近l1年来各国再生混凝土耐久性
2、的研究成果,包括再生混凝土抗氯离子渗透性、抗冻性、耐磨性、抗碳化性。通过灰色关联度定量分析了再生混凝土氯离子渗透性影响因素的主次关系。结果表明:再生混凝土的抗氯离子渗透性、抗冻性和耐磨性随再生粗骨料取代率增加而变差,混凝土耐磨性随再生细骨料取代率的增加而变好,大部分混凝土的抗碳化性随再生粗骨料取代率增加而变差,少部分出现变异;通过灰色关联分析得到的再生混凝土氯离子渗透性影响因素从大到小依次为水灰比、掺合料、混凝土龄期。关键词:再生骨料取代率;再生混凝土;耐久性;氯离子;抗冻性;耐磨性;碳化中图分
3、类号:TU528.79文献标志码:AInfluenceofRecycledAggregateReplacementRatioOilDurabilityofRecycledAggregateConcreteYINGJingwei。XIA()Jian—zhuang'(1.DepartmentofBuildingEngineering,TongjiUniversity,Shanghai200092,C;l1ina2.KeyLaboratory()fAdvancedCivilEngineeringMat
4、erialsofMiniswyofEducati()I1.TongjiUniversilY,Shal~ghai200092,Chin~1)Abstract:Basedontheintensivereferenceinvestigations,authorsreviewedtheresearchachievementsonrecycledaggregateconcrete(RAC)durabilityinthepast1lyearsathorneandabroad,whichincludingch
5、lorideionpermeability,frostresistance,abrasiveresjtance。andcarbonationresistance.Throughthegraycorrelationquantitativeanalysis,theprimaryandsecondaryrelationsofvariousfactorsinfluencingthechlorideionpermeabilitv。fRACwerestudied.Resultsshowthatthechlo
6、rideionpermeability,frostresistanceandabrasiveresistanceofRACbecomeworsewiththeincreasingofrecycledcoarseaggregatereplacementratio.Theabrasiveresistanceofconcretet)ecomesbetterwiththeincreasingofrecycledfineaggregatcreplacementratio.However,thecarbon
7、izationresistanceofmostconcretebecomebetterwiththeincreasingofrecycledcoarseaggregatereplacementratio,alittleofwhichappeardeviation:accordingtotheimportanceoftheinfluenceonthechlorideionpermeabilityofRACbasedongraycorrelationanalysis,theinfluencingse
8、quenceoftheimpactfactorsis:waterccmentrati()。admixture,concretecuringage.Ke,words:recycledaggregatereplacementratio;recycledaggregateconcrete;durability;cb1orideion;frostresistance;abrasiveresistance;carbonati()n收稿日期:2(111—1022基金项目:国家自然科学基金项目(5Ⅲ17834
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