基于气体渗透性的混凝土碳化性能研究  

Research on carbonation of concrete based on air permeability

作　　者：费正岳 李延波[2] 张士萍[3] 

机构地区：[1]南京海华混凝土集团有限公司,江苏南京210038 [2]盐城工学院材料工程学院,江苏盐城224051 [3]南京工程学院建筑工程学院,江苏南京211167

出　　处：《混凝土》2014年第12期22-24,31,共4页Concrete

基　　金：国家自然科学基金(51108231);住房和城乡建设部科学技术项目(2013-K4-20)

摘　　要：通过研究不同配合比混凝土的碳化深度以及气体渗透系数,发现粉煤灰可以减小碳化,并且碳化后混凝土的气体渗透性也会提高。同时分析了高性能混凝土气体渗透性与碳化性能之间的关系。结果表明混凝土的气体渗透性对碳化深度的控制程度是受粉煤灰掺量的影响,且粉煤灰掺量越高,气体渗透性对碳化的贡献作用越小。Carbonation depth and air permeability coefficient of concrete samples with different mix proportion were investigated. Results shows that addition of fly ash can decrease carbonation depth.Furthermore,air permeability increased after carbonation.Relation-ship between air permeability and carbonation was also studied.It was found that effect of air permeability on carbonation was impacted by the content of fly ash,and the contribution of air permeability to carbonation decreased with the increase of fly ash.

关 键 词：混凝土 粉煤灰 气体渗透性 碳化 

分 类 号：TU528.01[建筑科学—建筑技术科学]