Resistance to chemical attack of bittern-resisting cement in high-bittern environment  

作　　者：Yunbing Hou Bingwen Wang Yu Chen Botao Zhang Lin Yu 

机构地区：[1]School of Resource ＆ Safety Engineering, China University of Mining ＆ Technology （Beijing）, Beijing 100083, China

出　　处：《Journal of University of Science and Technology Beijing》2005年第5期469-475,共7页北京科技大学学报（英文版）

基　　金：This work was financially supported by the Key Scientific and Technological Project of Qinghai Province (No.2002-G-103)

摘　　要：A new kind of bittern-resisting cement （BRC） was introduced. This material is based on the ternary cementitious system of clinker containing C4A3 S phase, high-activity ground granulated blast-furnace slag （GGBFS） and fly ash （FA）. The hydration process and the hydrated products of BRC were studied by means of XRD, TG-DTA and SEM, and the resistance to chemical attack of BRC in high-bittern environment was also examined. The corrosion experiment in seven kinds of brines proved that BRC exhibits an excellent resistance to chemical attack of bittern. The corrosion resistance factors were calculated and all of them were greater than 0.96. It showed that BRC totally controls the cement-based material corrosion in brines from four aspects： （1） making full use of the dominant complementation effect of mineral materials; （2） diminishing the hydrated products easy to be attacked; （3） improving the microstructure of hardened cement mortar; （4） degrading the chemical attack of bittern.A new kind of bittern-resisting cement （BRC） was introduced. This material is based on the ternary cementitious system of clinker containing C4A3 S phase, high-activity ground granulated blast-furnace slag （GGBFS） and fly ash （FA）. The hydration process and the hydrated products of BRC were studied by means of XRD, TG-DTA and SEM, and the resistance to chemical attack of BRC in high-bittern environment was also examined. The corrosion experiment in seven kinds of brines proved that BRC exhibits an excellent resistance to chemical attack of bittern. The corrosion resistance factors were calculated and all of them were greater than 0.96. It showed that BRC totally controls the cement-based material corrosion in brines from four aspects： （1） making full use of the dominant complementation effect of mineral materials; （2） diminishing the hydrated products easy to be attacked; （3） improving the microstructure of hardened cement mortar; （4） degrading the chemical attack of bittern.

关 键 词：bittern-resisting cement ternary cementitious system high-activity mineral materials resistance to chemical attack BITTERN corrosion resistance factor corrosion mechanism 

分 类 号：TF805.2[冶金工程—有色金属冶金]