甘肃陇南地区水泥基材料的碳硫硅钙石型硫酸盐腐蚀  

Thaumasite form of sulfate attack of cementitious materials in Longnan regions of Gansu province

作　　者：肖佳[1] 何彦琪[1] 郭明磊[1] 田承宇 徐勇[2] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中国水利水电第八工程局有限公司科研设计院,湖南长沙410004

出　　处：《混凝土》2016年第3期68-70,75,共4页Concrete

基　　金：国家自然科学基金项目(51278497)

摘　　要：对甘肃陇南地区的一栋典型砌体结构住宅的外墙砂浆和一座桥梁桥台处混凝土的腐蚀产物进行取样分析。该住宅和桥梁均在建成后的1~2年内遭到了腐蚀破坏,且破坏程度随时间增长而加剧。对样品进行FT-IR、XRD及Raman分析,结果显示,腐蚀产物中存在碳硫硅钙石晶体,即住宅外墙和桥梁发生了碳硫硅钙石型硫酸盐腐蚀,说明在该地区的地理及气候条件下,水泥基材料可发生碳硫硅钙石型硫酸盐腐蚀。The mortar samples from a typical masonry structure house exterior wall and the concrete samples from a bridge abutment in Longnan regions of Gansu province were examined. The damage to the house and the bridge appeared one to two years after their completion and enhanced with the growth of time. The samples were investigated by FT- IR spectra,XRD and Raman spectra,the results showthat thaumasite exist in the corrosion products and the exterior wall and bridge subjected to thaumasite form of sulfate attack. So the cementitious materials can occur thaumasite form of sulfate attack in the geographical and climatic conditions in the area.

关 键 词：碳硫硅钙石 硫酸盐腐蚀 水泥砂浆 混凝土 

分 类 号：TU528.041[建筑科学—建筑技术科学]