煤矸石对混凝土碱硅酸反应损伤的抑制作用  

Mitigation of Coal Gangue on Damage of Concrete Caused by Alkali-Silica Reaction

作　　者：詹炳根[1] 孙伟[1] 沙建芳[1] 许仲梓[2] 

机构地区：[1]东南大学材料科学与工程学院 [2]南京工业大学材料科学与工程学院,江苏南京210018

出　　处：《建筑材料学报》2008年第3期253-258,共6页Journal of Building Materials

基　　金：国家重点基础研究发展计划项目(973项目,2001CB610706);国家自然科学基金资助项目(50678058)

摘　　要：在具有潜在碱硅酸反应(ASR)的混凝土中掺入煤矸石,测定了在单一碱(NaOH)作用以及在NaOH+NaCl耦合作用下混凝土膨胀率和相对动态弹性模量的变化,对比研究了掺与未掺煤矸石混凝土发生ASR损伤的过程与规律.结果表明,煤矸石对单一碱(NaOH)以及NaOH+NaCl复合引起的混凝土ASR损伤均有较好的抑制作用.另外,就上述抑制作用的机理进行了分析.Coal gangue was incorporated in the concrete with potential alkali-silica reaction（ASR）.The expansion rate and relative dynamic modulus of elasticity of concrete were determined under the effects of NaOH and combined NaOH and NaCl.The damage evolutions and characteristics of concrete with coal gangue were compared with those without coal gangue.The results show that under the effect of NaOH and combined NaOH and NaCl,the concrete damage caused by ASR are mitigated by the addition of coal gangue.The mechanism of mitigation of concrete damage is analyzed.

关 键 词：混凝土 碱硅酸反应 煤矸石 辅助性胶凝材料 膨胀 

分 类 号：TU528.45[建筑科学—建筑技术科学]