Microstructural variation of hardened cement-fly ash pastes leached by soft water  

作　　者：LI Xiang YAN PeiYu 

机构地区：[1]Department of Civil Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Science China(Technological Sciences)》2010年第11期3033-3038,共6页中国科学(技术科学英文版)

基　　金：supported by the National Basic Research Program ("973" Project) (Grant No 2009CB623106);the Key Project of Beijing Natu-ral Science Foundation (Grant No 8100001)

摘　　要：The microstructural variations of hardened cement-fly ash pastes leached by soft water were investigated by MIP, XRD, TG and SEM. The results show that the mass of hardened cement-fly ash paste reduces and its microstructure deteriorates partly after leaching of soft water. At the leaching duration of 180 days, the hardened paste containing fly ash deteriorated a little more serious than the plain cement paste, but the incorporation of fly ash in a proper ratio was helpful to defer the trend of deterioration of the hardened paste microstructure. The microstructural stability of hardened cement-fly ash paste wasn’t damaged severely during the 180 days leaching duration.The microstructural variations of hardened cement-fly ash pastes leached by soft water were investigated by MIP, XRD, TG and SEM. The results show that the mass of hardened cement-fly ash paste reduces and its microstructure deteriorates partly after leaching of soft water. At the leaching duration of 180 days, the hardened paste containing fly ash deteriorated a little more serious than the plain cement paste, but the incorporation of fly ash in a proper ratio was helpful to defer the trend of deterioration of the hardened paste microstructure. The microstructural stability of hardened cement-fly ash paste wasn’t damaged severely during the 180 days leaching duration.

关 键 词：CEMENT fly ash LEACHING MICROSTRUCTURE calcium hydroxide 

分 类 号：TU528[建筑科学—建筑技术科学]