湖南大学学报（自然科学版）2013，Vol.40Issue(8)：90-96,7.
高温对碱矿渣水泥石微结构及力学性能的影响
Microstructure and Mechanical Properties of Alkali-activated Slag Cement Pastes Subjected to Elevated Temperatures
摘要
Abstract
The strength change of alkali-activated slag cement pastes (AASC) exposed to the hot environment from room temperature to 1 000 ℃ was studied.The phase composition and microstructure of AASC were also examined by using DSC/TG,XRD and SEM.The results indicated that the change of AASC activated by water glass was similar to the AASC activated by sodium hydroxide.The loss of evaporative water in AASC at 200 ℃ densified the microstructure of hardened pastes,resulting in an increase in compressive strength but a decrease in flexural strength.When the AASC were heated from 400～ 1 000 ℃,both flexural and compressive strength decreased continually.Particularly,the strength dropped significantly in the range of 600 ～ 800 ℃ due to the phase reaction leading to the formation of gehlenite.关键词
碱矿渣水泥/高温/力学性能/物相组成/微观结构Key words
alkali-activated slag cement/ high temperature/ mechanical properties/ phase composition/microstructure分类
建筑与水利引用本文复制引用
傅博,杨长辉,叶剑雄,程臻赟,曹集舒..高温对碱矿渣水泥石微结构及力学性能的影响[J].湖南大学学报（自然科学版）,2013,40(8):90-96,7.基金项目
国际科技合作计划项目(2009DFR50450) （2009DFR50450）
重庆大学大型仪器设备开放基金资助项目 （）
