Effect of fly ash on Portland cement systems Part II. High-calcium fly ash
Effect of fly ash on Portland cement systems Part II. High-calcium fly ash
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DOI：
10.1016/s0008-8846(00)00388-4
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发表时间：
2000-10-01
影响因子：
11.4
通讯作者：
Papadakis, VG
中科院分区：
文献类型：
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作者：
Papadakis, VG
研究了高钙粉煤灰（FH，23%总CaO-5%游离CaO），高SO 3含量（4.3%），作为添加剂在砂浆中，取代部分体积的波特兰水泥或骨料。测量强度、孔隙率、结合水和氢氧化钙含量的发展。当这种粉煤灰取代骨料，显着更高的强度观察到从开始的水化，以及更高的水结合和显着降低孔隙率。在置换骨水泥的情况下，强度保持不变。一个简化的计划描述的FH在水化波特兰水泥的化学反应，提出并应用于开发反应产物和孔隙度估计的数学表达式。(C)2000爱思唯尔科技有限公司版权所有。
A high-calcium flyash (FH, 23% total CaO-5% free CaO), with high SO3 content (4.3%), was studied as additive in mortar, replacing part of the volume either of Portland cement or aggregate. The development of the strength, porosity, bound water, and calcium hydroxide content was measured. When this fly ash replaces aggregate, significantly higher strengths were observed from the beginning of the hydration, as well as higher water binding and significantly lower porosity. In the case of cement replacement, the strength remained constant. A simplified scheme describing the chemical reactions of the FH in hydrating Portland cement is proposed and applied to develop mathematical expressions for reaction products and porosity estimation. (C) 2000 Elsevier Science Ltd. All rights reserved.