摘要：为提高水泥基材料的密实度,研究将纳米SiO2掺入水泥基材料后对混合体系粉体性能的影响,探讨混合体系内的颗粒附着、填充情况。研究表明:数量众多的纳米SiO2颗粒包围在水泥熟料颗粒周围,使得水泥标准稠度用水量大幅增加,且使凝结时间大为缩短;掺入纳米SiO2的水泥基材料的堆积密实度达到54%,能够获得更密实的水泥基材料,进而更好地促进强度发展。
关键词： 纳米二氧化硅；水泥基材料；堆积密实度
Abstract： In order to improve the packing and filing performance of cement-based materials， the effect of silicon dioxide nano-particles on the powder performance of mixed system was researched， and the adhesive and filling condition among particles of mixed system was explored. The results showed that the numerous particles of silicon dioxide nano-particles surrounded the particles of cement clinker which rapidly increased water requirement of normal consistency. And the packing density of mixed system was improved when the silicon dioxide nano-particles were added， which also promoted the strength of the harden paste of cement-based materials.
Keywords：silicon dioxide nano-particles；cement-based materials； packing density
