涂层和养护方式对混凝土碳化性能及微观结构的影响研究  

Study of effects of coating,surface treatment and curing methods on concrete carbonization performance

作　　者：崔宏志[1] 张俊乐[1] 朱国飞[1] 叶志鑫[1] 

机构地区：[1]深圳大学土木工程学院广东省滨海土木工程耐久性重点实验室,广东深圳518060

出　　处：《混凝土》2013年第8期36-40,共5页Concrete

基　　金：国家自然科学基金(51072120);广东省自然科学基金(9351806001000001)

摘　　要：通过试验,分别研究了不同类型涂层和不同养护方式对混凝土抗碳化性能的影响。同时,利用电子扫描显微镜(SEM)、能量色散X射线光谱仪(EDX)和压汞法(MIP)对碳化混凝土的微观结构进行了分析。研究表明:混凝土外表面的涂层对混凝土的抗碳化性能有一定程度的提高,其中,渗透型涂层对混凝土抗碳化性能有较大的提高。经过打磨的面的碳化深度比没有经过打磨面的碳化深度要小。经过快速养护的混凝土的碳化深度大于标准养护条件下的混凝土的碳化深度。与碳化前相比,碳化后混凝土的内部结构变得相对密实,大孔径孔隙相对减少,孔径分布较为均匀,总孔隙率减小。Effects of different types of coating on concrete carbonation after standard curing and accelerated curing,and effects of different surface treatment and different curing methods on concrete carbonation resistance were studied.Meanwhile,the microstructure of carbonated concrete with scanning electron microscope（SEM）,EDX and mercury intrusion porosimetry（MIP）was analysised.Experimental results indicated that：concrete outer surface coating had positive effects on concrete carbonation resistance performance.Especially,the infiltration coating could improve anti-carbonation capability of concrete largely.Surface polishing could also improve the anti-carbonation capability of concrete.Carbonation depth of concrete after accelerated curing was greater than that of concrete after standard curing.The internal structure of carbonation concrete becomes relatively compact,bigger pores are relatively less,pore distribution was more uniform and total porosity decreases.

关 键 词：表面涂层 表面处理 养护方式 微观结构 

分 类 号：TU528.064[建筑科学—建筑技术科学]