环保高性能胶凝材料的制备

摘要

To develop a kind of high performance cementitious material which contains less cement, its theory foundation and techno-approach were studied. The key technology is that the components of the cementitious material should be selected rightly and its input-quantity should be optimized combining with the mill-activation technology to increase the hydration-degree of the cement. According to the theory upwards, some experiments were performed to make the environment-protected high performance cementitious material (EHPCM). A proper cementitious system was selected, the proportion of components in cementitious system was optimized so that a kind of EHPCM was made. Theory calculation and experiment results show that the four-dimension cementitious system with an activate technique has characteristics of low cement content and high hydration degree, which can be used to make EHPCM. The reactived powder concrete whose compress strength is 132 MPa and the flexural strength is 18 MPa is made using the cementitious materials developed in the experiment.%为了研制低水泥用量的环保型高性能胶凝材料,分析其实现的理论基础和技术途径,得出其中的关键技术是优化胶凝体系的组分及其掺量以及配合振动磨机的活化处理技术,从而大幅度提高水泥的水化程度,使得水泥用量最小.结合试验研制环保高性能胶凝材料(EHPCM),首先选择胶凝体系,然后,对四元胶凝体系中各个规格的组分进行优化.理论计算和实验结果表明:通过磨机活化技术处理的四元胶凝体系水泥用量最少,且具有最高的水泥水化程度和较优异的力学性能,是环保高性能胶凝材料最适宜的胶凝体系;环保胶凝材料的配比即水泥、硅灰、粉煤灰、石英粉的质量比为1-0.25-0.35-0.40,运用这种胶凝材料可配制出流动性良好,抗压强度和抗折强度分别达132 MPa和18 MPa的活性粉末混凝土.