氯氧镁水泥耐水性及其改善的研究

对氯氧鲜水泥不耐水的原因及其改善机理，方法、抗水处加剂的研究现状进行了评术。认为水对水化物的水解作用是其不耐水的根本原因；掺加磷酸系外加剂对改善氯氧镁水泥的耐水性是很有效的，共改善机理可其对水化物水解反应的影响有关。讨论了氯氧镁水泥耐水的评价方法，并对今后的研究提出了几个尚需深入的方面。

RESEARCH ON THE WATER RESISTANCE OF MAGNESIUM OXYCHLORIDE CEMENT AND ITS IMPOVEMENT

In the paper,state-of-the art of research on the water resistance of magnesium oxychlorde cement in China and abroad is reviewed.Caused for the poor resistance to water,methods and mechanism forthe improvement and judgement of the water resistance of the cement and the water resistance additives andtheir effect are also discussed.It is considered that the hydrolysis of phase 5 or phase 3 in water can be themain cause for the poor water resistance,which can be improved by the addition of phosphonic acid or phos-phates efficiently.