外掺氧化镁碾压混凝土试验研究  

Experimental study of RCC mixed with magnesia

作　　者：李鹏辉[1] 刘光廷[1] 许维[1] 陈凤岐[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《水利水电技术》2004年第4期82-84,共3页Water Resources and Hydropower Engineering

基　　金：国家教育振兴计划资助项目(082100100).

摘　　要：试验研究了外掺氧化镁碾压混凝土的变形及抗冻抗渗性能.试验表明:外掺氧化镁碾压混凝土自生体积变形具有明显的温度效应,集料对自生体积变形有抑制作用.外掺氧化镁碾压混凝土抗冻和抗渗性能均有所降低,细观观察氧化镁水化的崩解可以解释抗冻抗渗性能降低的原因.The paper discusses deformation,frost resistance and impermeability of the RCC mixed with magnesia.Testing has shown,that the RCC mixed with magnesia has significant thermal effects on its autogenous volume deformation while the aggre-gate contributes to the restraint of autogenous volume deformation.Addition of magnesia into the RCC results in lower frost-re-sistance and impermeability and this can be explained by magnesia crumbling from hydration.

关 键 词：自生体积变形 外掺氧化镁 碾压混凝土 抗冻性 抗渗性 

分 类 号：TV431[水利工程—水工结构工程]