高分散性硅灰对混凝土性能影响的研究  

Study on the Influence of Highly Dispersible Silica Fume on the Concrete Performance

作　　者：雷英强 吴伟 LEI Yingqiang;WU Wei(Sinohydro Bureau 7 Co.,Ltd.,Chengdu Sichuan 610213)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都610213

出　　处：《四川水力发电》2023年第6期63-67,共5页Sichuan Hydropower

摘　　要：本文研究了预分散处理前后的硅灰分散性及其对混凝土性能的影响,验证了提高硅灰分散性可以提高其填充性和火山灰活性、进而提高混凝土性能的假设。通过偏光显微镜、悬浮液静置沉降高度测试,证明了经分散处理的硅灰具有良好的分散性。混凝土性能测试的结果表明:经预分散处理的对比未处理的硅灰能够降低混凝土孔隙率10%,减少渗水高度56%,提高混凝土28 d强度26%,说明预分散处理后可明显提升硅灰的填充能力及火山灰活性。阐述了对高分散性硅灰对混凝土性能影响的研究。The paper studied impact of the dispersibility of silica fume before and after pre-dispersion treatment on concrete performance,verified the hypothesis,which the filling ability and the pozzolanic activity of silica fume could be improved by dispersion of silica fume,consequently the performance of concrete could be promoted.The results indicated that the pre-dispersed silica fume had good dispersibility by polarizing microscope and settlement static settlement height test.The results of the concrete performance test showed that compared with the original silica fume,the pre-dispersed silica fume reduced concrete porosity by 10%,water seepage height by 56%,and increased the 28-day strength concrete by 26%,indicating that silica fume pretreatment significantly improved its filling capacity and pozzolanic activity.This paper describes the study on the influence of highly dispersible silica fume on the concrete performance.

关 键 词：高分散 硅灰 孔隙率 渗水高度 强度 混凝土性能 

分 类 号：TV7[水利工程—水利水电工程] TV52TV43