The effects of aggregate properties on lightweight concrete

被引：142
|
作者：
Lo, Tommy Y. [1 ]
Tang, W. C. [1 ]
Cui, H. Z. [1 ]
机构：
[1] City Univ Hong Kong, Dept Bldg & Construct, Kowloon, Hong Kong, Peoples R China
来源：
BUILDING AND ENVIRONMENT | 2007年 / 42卷 / 08期
关键词：
lightweight concrete; strength; w/c ratio; porosity;
D O I：
10.1016/j.buildenv.2005.06.031
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper describes a study of the effects of several factors on the strength of lightweight aggregate concrete composites: aggregate strength, w/c ratio and the porosities of the interfacial zone and within the hardened cement paste. Concrete samples with three different water cement ratios (i.e. 0.4, 0.44, 0.48) were compared. The crushing strengths of three grades of expanded clay lightweight aggregates (i.e. 25, 15, 5 mm) and the pore distributions of the hardened cement pastes were measured. Increasing the water/cement ratio was found to decrease the strength of lightweight aggregate concrete. The numbers of pores within the cement paste and in the aggregate/cement paste interfacial zone were found to increase. (c) 2006 Elsevier Ltd. All rights reserved.
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页码：3025 / 3029
页数：5
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