矿物掺合料对水泥石抗酸性侵蚀性能的影响  

Effects of Mineral Admixtures on Acid Corrosion-resistance of Cement Pastes

作　　者：刘数华[1,2] 严军伟[2] 邢婕[2] 李杰[2] 罗宇[2] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点试验室,南京210098 [2]武汉大学水资源与水电工程科学国家重点试验室,430072

出　　处：《混凝土与水泥制品》2012年第6期19-21,共3页China Concrete and Cement Products

基　　金：水文水资源与水利工程科学国家重点实验室开放研究基金项目(2010490611);中央高校基本科研业务费专项资金资助项目(111039)

摘　　要：通过对不同配合比净浆试件浸泡在醋酸溶液后进行抗压强度、SEM等测试,研究了石灰石粉、硅粉、粉煤灰等矿物掺合料对水泥石抗酸性侵蚀性能的影响。结果表明,水胶比较低时,由于浆体结构致密,侵蚀破坏进程较慢;掺入石灰石粉后,浆体在醋酸侵蚀下的强度降低,远低于基准浆体;石灰石粉与粉煤灰及硅灰复掺时,由于发生火山灰反应,浆体的抗酸性侵蚀性能得到提高。The effects of minieral admixtures such as limestone powder, silica fume and fly ash on acid erosion- resistance of cement paste are researched through the compressive strength test and SEM of paste with different mix proportions soaked in acetic acid. The results show that pastes with low water-binder ratio have compact microstructure, erosion damage process is slow. After adding limestone powder, the strength of paste in acetic acid decreases, which is much lower than the strength of normal paste. Mixed limestone powder with fly ash and silica fume, the acid erosion- resistance of paste is improved by the pozzolanic reaction.

关 键 词：矿物掺合料 水泥石 酸性侵蚀 强度 

分 类 号：TU528.041[建筑科学—建筑技术科学]