- 目录
- 混凝土与制品
- 首页
混凝土孔结构填充材料的选择及适用性分析
作者：邢洁1，于蕾2
（1.河南建筑职业技术学院，河南 郑州 450064；2.清华大学 土木工程安全与耐久性教育部重点实验室，北京 100084）
摘要：通过文献收集及市场调研，详细划分了适用于水泥混凝土孔结构填充的材料种类，分析了填充材料对混凝土性能影响的机理；通过对填充材料粒径范围的考察，从小粒径颗粒填充大孔隙的角度，分别提出适用于100~1000 nm孔以及大于1000 nm孔的填充材料。结果表明，纳米硅灰、沸石粉、氮化硅以及微细粒级石灰石粉可用来填充100~1000 nm毛细孔；磷石膏粉和微粒级石灰石粉可用来填充5 μm以上的孔隙；粉煤灰和矿渣粉适宜填充15 μm以上的孔隙；纳米硅灰、沸石粉以及微粉以下粒径的石灰石粉可用来填充1000 nm以上的有害孔隙。
关键词：混凝土；孔结构；填充材料；优选；适用性
中图分类号：TU528 文献标识码：A 文章编号：1001-702X（2020）06-0051-05
Selection of concrete pores filling materials and its applicability analysis
XING Jie1，YU Lei2
（1.Henan Technical College of Construction，Zhengzhou 450064，China；
2.Key Laboratory of Structure Safety and Durability of China Education Ministry，Tsinghua University，Beijing 100084，China）
Abstract：By means of literature and market investigation，the species of materials for filling the pore with different size in concrete are analyzed in detail. The influence mechanism of the filling material on the properties of the concrete was analyzed. By surveying the range of the particle diameter，the kinds of materials which can filling in capillary pores between 100 nm and 1000 nm and pores bigger than 1000 nm have been put forward. The results shows that the capillary pores with diameter from 100 nm to 1000 nm can be filled with silicon powder，zeolite powder，silicon nitride powder and limestone powder with micro fine grade. Pores with diameter over 5 micrometer can be filled with ardealite powder and limestone powder with micro grade. Pores with diameter over 15 micrometer can be filled with fly ash and slag. All of the harmful pores with diameter over 1000 nm can be filled with nanometer size silicon powder，zeolite powder and limestone powder with fine grade.
Key words：concrete，pore structure，filling materials，optimized selection，applicability