桂林理工大学学报2011，Vol.31Issue(4)：570-573,4.
复合型镁质胶凝材料的水化相及其硬化体显微结构
Hydration Phase and Microscopic Characteristics of Composite Magnesium Oxychloride Cement
摘要
Abstract
In X-ray powder diffraction analysis and infrared absorption spectrum analysis, when composite magnesia cementitious material made up of caustic dolomite and calcined magnesite according to suitable proportion between the caustic dolomite and the calcined magnesite and mixed with aqueous solution of MgCl2 according to the 5 mole ratio of MgO to MgCl2, the hydration phase of the hardened composite magnesium oxychloride cement is Mg3(OH)5Cl · 4H20. The strength of the hardened composite magnesium oxychloride cement will increase when the percentage of the calcined magnesite added to the caustic dolomite. Its curing 24 h bending strength reaches 9. 07 Mpa and curing 28 d compressive strength up to 183. 50 Mpa. Thus the hardened composite magnesium oxychloride cement is formed. Its microscopic characteristics possess morphology of the main large gel phase, but not needle-bar-like crystals. The needle-bar-like crystals only exist in the holes. The main large gel phase is considered to be the source of very high mechanical strength of the composite magnesium oxychloride cement.关键词
菱苦土/苛性白云石/复合型胶凝材料/水化相/显微结构Key words
calcined magnesite/ caustic dolomite/ composite magnesia cementitious material/ hydration phase/ microscopic characteristic分类
化学化工引用本文复制引用
蒋述兴..复合型镁质胶凝材料的水化相及其硬化体显微结构[J].桂林理工大学学报,2011,31(4):570-573,4.基金项目
广西自然科学基金项目(桂科基0639061) （桂科基0639061）
