再生骨料对混凝土的抗氯离子渗透性能影响  

Influence of recycled aggregate on resistance of concrete to chloride penetration

作　　者：韦庆东[1] 孙俊[1] 黄沛增 张磊[1] 徐莹[1] 

机构地区：[1]中国建筑科学研究院,北京100013 [2]陕西省建筑科学研究院,陕西西安710082

出　　处：《混凝土》2014年第12期101-104,共4页Concrete

基　　金：国家"十二五"科技支撑计划课题:固体废弃物本地化再生建材利用成套技术(2011BAJ04B05)

摘　　要：利用III级再生粗、细骨料制备C30和C40两种强度等级再生骨料混凝土,并分别掺加0和30%粉煤灰。测定该混凝土电通量,并分析再生粗、细骨料对混凝土抗氯离子性能影响规律。试验结果表明:随着再生骨料替代率增加,混凝土抗氯离子渗透性能逐渐减低,且对C40混凝土抗氯离子渗透性能影响较小;再生骨料混凝土中掺入30%粉煤灰,可有效改善其抗氯离子渗透性能。Mixing Class III recycled coarse and fine aggregate,C30 and C40 degree concrete recycled aggregate concrete were prepared with 0 and 30%fly ash amount of cementitious material respectively.Concrete electric fluxes were measured and analyzed for the rule of influence of Class III recycled aggregate on resistance of concrete to chloride penetration.The results indicate that with the increase of re-placement ratio of recycled aggregate,resistance of concrete to chloride penetration gradually reduced.Compared with C30 degree con-crete,C40 degree concrete was less affected by replacement ratio of recycled concrete.Resistance of C30 concrete to chloride penetration was significantly affected when replacement ratio of recycled aggregate beyond 15%.Recycled aggregate concrete incorporates with 30%amount of bonding materials,which can effectively improve resistance of concrete to chloride ion penetration.

关 键 词：再生骨料 再生骨料混凝土 电通量 抗氯离子渗透性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]