Influence of cement type on ITZ porosity and chloride resistance of self-compacting concrete

被引：99
|
作者：
Leemann, Andreas [1 ]
Loser, Roman [1 ]
Muench, Beat [1 ]
机构：
[1] Empa, Swiss Fed Labs Mat Testing & Res, CH-8600 Dubendorf, Switzerland
来源：
CEMENT & CONCRETE COMPOSITES | 2010年 / 32卷 / 02期
关键词：
Interfacial transition zone; Permeability; Blended cement; Self-compacting concrete; INTERFACIAL TRANSITION ZONE; PORE STRUCTURE; PASTE; PERMEABILITY; PERCOLATION; AGGREGATE;
D O I：
10.1016/j.cemconcomp.2009.11.007
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
With the increasing use of self-compacting concrete (SCC) its durability has come into focus. Concerning the microstructure of concrete, the porosity in the interfacial transition zone (ITZ) is regarded as a key feature for permeability and durability. Generally, a combination of cement and mineral admixtures is used for the production of SCC. In the present study, ITZ porosity of four SCC mixtures produced with ordinary Portland cement, Portland limestone cement, slag cement and ordinary Portland cement combined with fly ash is analyzed. Additionally, the chloride migration coefficient is determined. ITZ porosity and width of the SCC mixtures are similar. The substantial differences in the chloride migration coefficients show that the binder type has a stronger influence on permeability than the pore volume in the ITZ. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：116 / 120
页数：5
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