水乳环氧对水泥砂浆强度的影响

通过对水泥砂浆中掺加水乳环氧,研究了水乳环氧对水泥砂浆强度的影响;并在体系中掺加矿渣微细粉,成功地制备了环氧树脂聚合物水泥基材料。运用SEM、XRD等微观测试手段,初步研究了环氧树脂水泥基材料的微观结构,进而探讨了该聚合物对水泥基材料的改性作用与机理。研究结果表明,双掺水乳环氧和矿渣微粉改性的水泥砂浆具有较高的抗折强度和抗压强度。环氧聚合物和微细矿粉共同作用下的减水效应、密实效应、火山灰效应、填充效应以及固化交联作用能够赋予水泥基材料良好的力学性能。体系中水泥水化的主要产物为C—S—H凝胶和水化铝酸钙,而且水化产物多为凝胶体和徼细晶体．环氧树脂固化后。有机物呈网络胶状体。没有氢氧化钙特征峰出现。

The Influence on the Strength of Cement Mortars by Emulsified Epoxy

The influence on the strength of cement mortars by adding emulsified epoxy is studied, and epoxy resin polymer cement mortars with excellent performances are made up through modifying ordinary Portland cement with emulsified epoxy and micro-fine slag. The microstructure of the epoxy resin polymer cement materials are studied and their action and mechanism are discussed by means of modern detection measures such as SEM, XRD. The experimental results indicate cement mortars modifying emulsified epoxy and micro-fine slag have higher compressive strength and flexible strength. The series effects of water-reducing, density, pozzolanicity, filling and solidification cross linking through the action together of epoxy organism and micro-fine slag can endow cement-based materials with perfect mechanic performance. The main hydration products in the system are C-S-H gel and micro-crystal hydrated calcium aluminate. When epoxy resin is solidified, the organism is network. No Ca(OH) 2 has been found.