Production of high-performance concrete by addition of fly ash microsphere and condensed silica fume

被引：24
作者：
Chen, J. J. [1 ]
Ng, P. L. [2 ,3 ]
Li, L. G. [4 ]
Kwan, A. K. H. [3 ]
机构：
[1] Foshan Univ, Foshan, Peoples R China
[2] Vilnius Gediminas Tech Univ, Vilnius, Lithuania
[3] Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China
[4] Guangdong Univ Technol, Guangzhou, Guangdong, Peoples R China
来源：
MODERN BUILDING MATERIALS, STRUCTURES AND TECHNIQUES | 2017年 / 172卷
关键词：
Condensed silica fume; fly ash microsphere; high-performance concrete; PARTICLE-SIZE DISTRIBUTION; PACKING DENSITY; CEMENTITIOUS MATERIALS; LIMESTONE FILLER; RHEOLOGY; POWDER; FLOW;
D O I：
10.1016/j.proeng.2017.02.045
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
With reference to the packing model of concrete materials, addition of fly ash microspheres (FAM) to fill the voids between cement grains, followed by addition of condensed silica fume (CSF) to further fill the voids between FAM would reduce the water content to achieve the desired flowability. This could allow the adoption of lower water/cementitious materials (W/CM) ratio to produce High- Performance Concrete (HPC). This study was aimed to evaluate the effects of FAM and CSF on the packing density of cementitious materials and the flowability and strength of cement paste. The results showed that the addition of FAM and CSF can significantly increase the packing density, thereby enhancing flowability and strength performance concurrently. (C) 2017 The Authors. Published by Elsevier Ltd.
引用
收藏
页码：165 / 171
页数：7
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