非洲天然火山灰混凝土抗氯离子渗透性能改善研究  

Improve of compound mineral admixture on African natural pozzolan concrete resistance to chloride ion permeability

作　　者：夏京亮[1] 高波 周永祥[1] 岳新兴 

机构地区：[1]中国建筑科学研究院,北京100013 [2]中国路桥工程有限责任公司,北京100011 [3]中交第二航务工程局有限公司,湖北武汉430040

出　　处：《混凝土》2017年第11期19-22,26,共5页Concrete

基　　金："十三五"国家科技支撑计划项目课题"利用火山灰渣制备绿色建筑材料关键技术研究与应用"(2016YFC0701002)

摘　　要：通过RCM和电通量法对粉煤灰、矿渣、硅灰等按照不同比例组成的单掺、双掺、三掺矿物掺合料体系对非洲天然火山灰混凝土抗氯离子渗透性能改善进行研究,并通过SEM和压汞法对其进行微观机理分析。结果表明:掺加天然火山灰质材料早期抗氯离子渗透性能比纯水泥混凝土差,但是随着龄期增长逐渐优于纯水泥混凝土,复掺粉煤灰和矿渣粉均能较好的改善天然火山灰质材料混凝土的抗氯离子渗透性能,复掺超细粉煤灰和硅灰改善效果更佳,天然火山灰质材料能够改善混凝土的孔结构,同时使混凝土浆体更加密实。The influence was studied by electric flux method and RCM method of natural pozzolan to resistance to chloride ion permeability of concrete,and the impact of the mechanism was analyzed by mercury porosimetry and SEM.The results showed that early resistance to chloride ion permeability was worse of concrete adding natural pozzolan than that of pure cement,while grew better with age gradually.Fly ash and slag powder complex in concrete could better improve the resistance to chloride ion permeability of concrete adding natural pozzolan,and the improvement was better of concrete complex with superfine fly ash and silica fume.In addition,natural pozzolan could improve the pore structure of concrete and make the concrete slurry more dense.

关 键 词：公路工程 天然火山灰质材料 电通量 RCM 复合矿物掺合料 

分 类 号：TU528.01[建筑科学—建筑技术科学]