Heat of hydration of concrete containing powdered scoria rock as a natural pozzolanic material

被引：28
作者：
Alhozaimy, A.
Fares, G.
Alawad, O. A. [1 ]
Al-Negheimish, A.
机构：
[1] King Saud Univ, Coll Engn, Dept Civil Engn, Riyadh 11451, Saudi Arabia
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2015年 / 81卷
关键词：
Scoria rock; Heat of hydration; Isothermal calorimetry; Semi-adiabatic; Temperature rise; Mass concrete; Fly ash; Silica flour; MASS CONCRETE; FLY-ASH;
D O I：
10.1016/j.conbuildmat.2015.02.011
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Specifications for mass concrete constructions typically mandate the use of pozzolanic materials with a low heat of hydration. In this paper, the influence of different powdered scoria rocks on reducing the heat of hydration and the associated temperature rise in mass concrete was investigated. Six paste mixtures, including a control and mixtures containing three sources of powdered scoria rocks (SR1, SR2, SR3), fly ash (FA) and ground silica flour (GS), were investigated using isothermal calorimetry. Also, the temperature rise due to the heat of hydration of their corresponding concrete mixtures cast in a semi-adiabatic block was recorded. The compressive strength development and microstructure of concrete mixtures were examined. The results show that powdered scoria rocks were as effective as FA in reducing the heat of hydration and peak temperature rise and can be used as a source of natural pozzolan for mass concrete applications. (c) 2015 Elsevier Ltd. All rights reserved.
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收藏
页码：113 / 119
页数：7
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