摘要
根据分形几何理论评价超细粉体的活性,探讨纳米SiO2对水泥早期水化的影响。用激光粒度分布仪测试水泥试样在早期水化时的颗粒分布状况,应用分形理论分析评价了水泥试样的粒度分布特征,测试、计算了不同试样相应的分形维数。研究结果表明,随水化时间的增加,掺入纳米SiO2的水泥试样的分数维的数值变化的程度更大一些,掺入纳米SiO2的水泥试样水化更快,进而说明了由于纳米SiO2具有更高的火山灰活性而促进了熟料水化更快。
The superfine powder activity was evaluated by fractal geometrical theory, and the effect of SiO2 nano-particles on early hydration of Portland cement was explored. The cement samples were studied with the laser particle sizer. The characteristic of particle size distribution of the cement samples was investigated using fractal theory. The fractal dimension of different samples were tested and counted. The results showed that the sample containing with SiO2 nano-particles had more change in fractal dimension and faster hydration. So the SiO2 nano-particles with high pozzolanic activity advanced faster hydration of clinker.
出处
《中国粉体技术》
CAS
2008年第5期45-47,共3页
China Powder Science and Technology
基金
四川省科学基金资助项目
编号:04JY029-060-1
四川省重点学科"材料学"建设基金资助项目
关键词
纳米颗粒
硅灰
分数维
颗粒分布
nano-particle
silica fume
fi-actal dimension
particle size distribution
