外掺氧化镁混凝土性能研究综述  

Survey of the Properties of Concrete Mixed with MgO

作　　者：李家正[1] 陈霞[1,2] 杨华全[1] 王迎春[1] 

机构地区：[1]武汉市长江科学院 [2]武汉大学博士后流动站,武汉430010

出　　处：《膨胀剂与膨胀混凝土》2010年第1期10-14,共5页 Expansive Agents & Expansive Concrete

摘　　要：总结分析了外掺氧化镁混凝土的力学性能、变形性能和长期耐久性能,研究表明外掺氧化镁能显著改善混凝土的干缩、自生体积变形、徐变和抗渗、抗冻和抗冲磨性能,略微降低混凝土的弹模,可以延缓混凝土的碳化速度,减小碳化深度。总体而言,外掺氧化镁混凝土的部分性能优于普通混凝土,但要谨慎选择氧化镁的掺量和细度。It has summarized and analyzed the physical performance,deformation and long-term durability of concrete with MgO incorporated.Results show that MgO applied in concrete is favorable to improve deformation properties such as drying shrinkage,autogenously volume changes and creep and durability properties including permeability,frost resistance and bras ion resistance,and it could decline elastic modulus of concrete slightly and delay carbonization speed.Overall,some of performances of MgO concrete are better than conventional concrete but it should bear in mind that content and fineness of MgO should be stringent in construction.

关 键 词：氧化镁 混凝土 变形性能 耐久性 

分 类 号：TU528.042.4[建筑科学—建筑技术科学]