矿物掺合料对珊瑚砂混凝土性能的影响  

Effect of Mineral Admixtures on Coral Sand Concrete

作　　者：陈友治[1] 马章强 孙涛[1] 程书凯 

机构地区：[1]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《建材世界》2016年第2期11-14,31,共5页The World of Building Materials

基　　金："十二五"国家科技支撑计划课题(2014BAB15B01)

摘　　要：该文以珊瑚砂作为细骨料来配制C30珊瑚砂混凝土,研究了粉煤灰、矿粉、偏高岭土对珊瑚砂混凝土的力学性能、氯离子扩散系数影响规律,并通过XRD、TG对其微观机理进行初步分析。研究结果表明,掺加粉煤灰会降低珊瑚砂混凝土的强度,矿粉对于珊瑚砂混凝土的强度影响较小,而掺加偏高岭土会明显提高珊瑚砂混凝土的抗压强度和降低氯离子扩散系数,减少Ca(OH)_2的含量,使珊瑚砂混凝土的渗透性能得到优化。The coral sand was used as fine aggregate to formulate C30 coral sand concrete. And the influence of fly ash,slag,metakaolin ws studied on the mechanical properties and chloride ion diffusion coefficient of coral sand con- crete, and then using XRD, TG their preliminary microscopic mechanism was analyzed. The results showed that, fly ash will reduce the strength of coral sand concrete, slag has little influence for the coral sand concrete, while metakaolin will significantly improve the compressive strength of coral sand concrete and reduce the chloride ion diffusion coefficient, reduce Ca（OH）2 content of concrete, and the permeability of concrete are optimized.

关 键 词：珊瑚砂 偏高岭土 氯离子扩散系数 渗透性能 

分 类 号：TU528[建筑科学—建筑技术科学]