改性剂对氯氧镁水泥性能影响的研究

Research on Influence of Modifier on Properties of Magnesium Oxychloride Cement

氯氧镁水泥是由轻烧镁粉(主要成分MgO)、氯化镁、水以及改性剂所形成的气硬性胶凝材料,它与普通的硅酸盐水泥相比具有许多优越性,但因其耐水性差严重限制了其应用。介绍了这种新型镁水泥的特点,通过加入外加剂可提高镁水泥的强度和耐水性,主要介绍了目前改性效果较好的粉煤灰和减水剂两种外加剂。

Themagnesium oxychloride cement is a kind of air hardening cementitious material formed by caustic burned magnesium powder(main component MgO),magnesium chloride,water and modifier.It has many advantages comparing with the ordinary portland cement,but its application is seriously limited due to its poor water resistance.The characteristics of this kind of new magnesium cement are introduced.The strength and water resistance of magnesium cement can be improved by adding additives.Two kinds of admixtures like fly ash and water reducing agent with better modification effect are mainly introduced at present.