The use of oil shale ash in Portland cement concrete

被引:66
|
作者
Smadi, MM [1 ]
Haddad, RH [1 ]
机构
[1] Jordan Univ Sci & Technol, Dept Civil Engn, Irbid, Jordan
来源
CEMENT & CONCRETE COMPOSITES | 2003年 / 25卷 / 01期
关键词
cement concrete; oil shale ash; OSA;
D O I
10.1016/S0958-9465(01)00054-3
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
An experimental investigation was undertaken to study the potential use of Jordanian oil shale ash (OSA) as a raw material or an additive to Portland cement mortar and concrete. Different series of mortar and concrete mixtures were prepared at different water to binder ratios, and different OSA replacements of cement and/or sand. The compressive strength of mortar and concrete specimens, cured in water at 23 degreesC, was determined over different curing periods which ranged from 3 to 90 days. The results of these tests were subjected to a statistical analysis. Equations were developed by regression analysis techniques to relate the effect of batch constituents on the strength developments of OSA mortars and concretes. The models were checked for accuracy by comparing their predictions with actual test results. The obtained results indicated that OSA replacement of cement, sand or both by about 10% (by wt) would yield the optimum compressive strength, and that its replacement of cement by up to 30% would not reduce its compressive strength, significantly. It was found that OSA on its own possesses a limited cementitious value and that its contribution to mortar or concrete comes through its involvement in the pozzolanic reactions. The statistical model developed showed an excellent predictability of the compressive strength for mortar and concrete mixes. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:43 / 50
页数:8
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