Investigation of concrete-clay interaction with regards to the thaumasite form of sulfate attack

被引：10
|
作者：
Abubaker, Farhat [1 ,2 ]
Lynsdale, Cyril [1 ]
Cripps, John [1 ]
机构：
[1] Univ Sheffield, Dept Civil & Struct Engn, Sheffield S1 3JD, S Yorkshire, England
[2] Omar Al Mukhtar Univ, Dept Civil Engn, El Beida, Libya
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2014年 / 67卷
关键词：
Degradation; Sulfate attack; Thaumasite; Lower Lias Clay; Pyrite; MORTARS; GLOUCESTERSHIRE;
D O I：
10.1016/j.conbuildmat.2013.10.033
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The influence of clay composition on the severity of attack due to thaumasite sulfate attack (TSA) on concrete made with CEM I and CEM I blended with 10% Limestone Filler (LF) was investigated. Concrete specimens were exposed to weathered Lower Lias Clay (LLC), for which the water soluble sulfate corresponded to the BRE sulfate class of DS-2, for 12 months at 5 and 20 degrees C. A parallel study was carried out in which specimens of the same concretes were placed-in sulfate solutions equivalent to DS-2 and DS-4 at the same temperatures. It was found that concrete exposed to clay with sulfate design class DS-2 deteriorated at a faster rate than corresponding specimens in DS-2 solution and at a similar or greater rate to those exposed to the DS-4 sulfate solution. This suggests that the aggressively of clay and resulting concrete deterioration could exceed what might be observed in concrete exposed to equivalent standard test solutions. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：88 / 94
页数：7
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