地聚合物耐久性能研究进展及改善途径

Research development and improvement on the durability performance of gerpolymer

地聚合物作为一种新型的胶凝材料,近年来一直受到广泛的关注与研究。针对地聚合物材料的耐久性问题,分别从抗碳化性能、耐热性、抗酸腐蚀性和抗硫酸盐侵蚀性4个方面,阐述了国内外的研究现状,比较了地聚合物与普通硅酸盐水泥在宏观性能上的差异;分析了钙含量和碱激发剂种类对地聚合物抗碳化性能和抗硫酸盐侵蚀性能的影响,水含量对其抗酸腐蚀性的影响,以及高温下无定型N-A-S-H凝胶的分子动力学模拟过程。综述了纳米改性、高温固化、掺加纤维材料等地聚合物耐久性的改性途径。

As a new type of cementitious material, geopolymer has received extensive attention and research in recent years. From the aspects of carbonation resistance, heat resistance, acid corrosion resistance and sulfate resistance, the current status of the researches on the durability of geopolymer are reviewed, and the differences of macro performance between geopolymer and Portland cement are compared. The effects of calcium content and types of alkali activator on carbonation resistance and sulfate resistance, the effects of water content on acid corrosion resistance, and themolecular dynamic simulation process of N-A-S-H gel at elevated temperatures are analyzed respectively. The ways to modify the durability of geopolymer such as nano additives, high tempera- ture curing and adding fiber materials are reviewed.