在对磷酸、粉煤灰分别改性研究的基础上,采取磷酸、粉煤灰及苯丙乳液对镁氯胶凝材料耐水性进行复合改性。研究结果表明,同时掺入20%粉煤灰、1%磷酸及5%苯丙乳液,可有效提高5.1.8主晶相在水中的稳定性,提高材料的密实度和抗水性能;水泥石的软化系数及早期强度均得到显著提高,分别达到0.90和48.6MPa;浸水28d抗压强度衰减较小,保持64.4MPa的高水平。综合改性效果显著。
On the basis of the research on the modification on magnesium oxychloride cement（MOC） with fly ash and phosphate,the phosphate,fly ash and styrene-acrylic emulsion were adopted to improve the water resistance of MOC.The results show that,while adding 20wt% fly ash,1wt% phosphate and 5wt% styrene acrylic emulsion to the cement,the stability of the main crystal phase 5·1·8 in water and the density and water resistance of the cement were improved effectively,and the softening coefficient and early strengh of the cement were greatly improved,respectively reaching 0.90 and 48.6MPa.After a 28d of water immersion test,the compressive strength lost a little,maintaining 64.4MPa.The comprehensive modification effect is remarkable.
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