常温下MgO-SiO_2-H_2O体系胶凝性的研究

Research on the Cementious Behavior of MgO-SiO_2-H_2O System at Room Temperature

利用XRD、DTA、SEM/EDS、IR和MIP以及化学分析等方法研究常温下MgO-SiO2-H2O体系的胶凝性能。结果表明,添加合适的外加组分,常温下MgO-SiO2-H2O体系具有比较优异的胶凝性能,其水化产物主要是非晶态的水化硅酸镁和Mg(OH)2;3 d前生成大量的Mg(OH)2和少量的水化硅酸镁,其后水化硅酸镁的量逐渐增多,为硬化浆体提供主要的强度来源。

Research on the cementious behavior of MgO-SiO2-H2O system was carried out by XRD, DTA, SEM/EDS, IR, MIP etc. The result showed that MgO and Microsilica could react at room temperature which gave a hardened product primarily comprised of Mg（OH）2 and gel magnesium silicate hydrate （M-S-H）. More Mg（OH）2 hut less M-S-H was produced in the first 3 days, however, number of M-S-H was increased slowly after 3 days.