在磷酸、聚合物单一改性的基础上，采用磷酸与苯丙乳液、硅丙乳液分别对氯氧镁水泥进行复合耐水性能改性实验。结果表明，磷酸能够提高氯氧镁水泥体系的耐水性能，但对水泥有明显的缓凝作用；苯丙、硅丙等高分子聚合物乳液对氯氧镁水泥的耐水性能没有明显的改性效果；磷酸能够促进聚合物膜在水化产物表面的粘附与覆盖，形成复合耐水保护层，适量的苯丙或硅丙乳液与磷酸复合，对氯氧镁水泥耐水性改性效果远好于单掺磷酸或聚合物，且克服了磷酸缓凝和早期强度大幅下降的缺陷。
On the basis of the research on a single modification on magnesium oxychloride cement (MOC)with phosphoric acid and polymer,then phosphoric acid and styrene-acrylic emulsion or silicone-acrylic emulsion were compound added to modify the water resistance of MOC respectively.The results show that,phosphoric acid can improve the water resistance of MOC system,but it has a obvious retarding effect on the cement;such as styrene-acrylic and silicone-acrylic emulsion polymers have no apparent modification effect on water resist-ance of MOC;phosphoric acid can promote the formation of polymer film and adhesion on the surface of the product hydration,then composite double film was formed.when compounding an appropriate amount of sty-rene-acrylic or silicone-acrylic emulsion with phosphate,MOC has much better water resistance modification effect than single-doped phosphate or polymer emulsions.At the same time,it can also overcome the defects of phosphate retarding effect and early strength decrease.
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