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.
出处
《混凝土》
CAS
CSCD
北大核心
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)
关键词
混凝土
粉煤灰
气体渗透性
碳化
concrete
fly ash
air permeability
carbonation
