Properties and Microstrcture of Styene-Acrylate Latez Modified Mortars
Two polymer latexes with different particle sizes and glass transition temperatures were employed to investigate the impacts of the polymer on various properties of polymer modified mortars. With varied polymer additions, the mechanical properties of the mortars as well as their spread diameter in the fresh state were measured. Semi-adiabatic temperatures of the mortar during setting were monitored to study the influences of the polymer latexes on the hydration process of cement. Scanning electron microscopy was used to observe the microstructure of the fresh and hardened mortars. It is clearly indicated that the mechanical properties of the hardened mortars are significantly enhanced due to the incorporation of the polymer with the cement hydrates. Direct observation on the fresh cement paste by environmental scanning electron microscopy gives solid proof that polymer particles are adsorbed by cement grains shortly after mixing, which is considered to account for the improved workability of the fresh mortar and the retardation effect on cement hydration.
polymer modified mortar mechanical properties cement hydration microstructure glass transition temperature
Yongliang Liu Xiangming Kong Qihong Li
Department of Civil Engineering, Tsinghua University, Beijing 100084, China Key Laboratory of Structural Engineering and Vibration of China Education Ministry, Beijing 100084, China
国际会议
6th Asian Symposium on Polymers in Concrete(第六届亚洲聚合物混凝土国际会议)
上海
英文
255-264
2009-10-29（万方平台首次上网日期，不代表论文的发表时间）