Optimization of fineness to maximize the strength activity of high-calcium ground fly ash - Portland cement composites
Optimization of fineness to maximize the strength activity of high-calcium ground fly ash - Portland cement composites
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DOI：
10.1016/j.conbuildmat.2008.08.024
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发表时间：
2009-05-01
影响因子：
7.4
通讯作者：
Kalyoncu, Hasan
中科院分区：
文献类型：
--
作者：
Felekoglu, Burak;Turkel, Selcuk;Kalyoncu, Hasan
根据其物理化学性质和水泥替代量的不同，在混凝土工业中可以提供经济的生产可能性，并改善混凝土的力学性能和耐久性能。近年来，超细灰已成为高性能混凝土的必备材料之一。然而，许多飞灰本质上是粗糙的，因此为了在混凝土生产中获得足够的性能，研磨是必要的。研究了粉磨对磨细高钙飞灰强度活性的影响。测定了其筛分细度、颗粒大小、比表面积等物理特性，并与原飞灰进行了比较。文中还讨论了一些实例，以及飞灰细度、强度和砂浆需水量之间可能存在的相互作用。从水泥砂浆强度最大化的角度出发，发现细度优化和含水率调整是高钙飞灰有效利用的关键参数。(C)2008爱思唯尔有限公司。保留所有权利。
Depending on their physical and chemical properties and the amount of replacements with cement, fly ashes may provide an economical production possibility in concrete industry and improve the mechanical and durability performance of concrete. In recent years, ultrafine fly ash has become one of the necessary ingredients of high-performance concrete. However, many of the fly ashes are coarse in nature, hence grinding is necessary to obtain sufficient performance in concrete production. In this study, the effect of grinding on strength activity of ground high-calcium fly ashes was investigated. Physical characteristics such as sieve fineness, grain particle size characteristics and Blaine specific surface area were also determined and compared with raw fly ash. Some case studies and possible interactions between fineness of fly ash, strength and water demand of mortars were discussed. The optimization of fineness coupled with the adjustment of water content were found as the key parameters of effective utilization of high-calcium fly ashes from the view point of strength maximization of cement mortars. (C) 2008 Elsevier Ltd. All rights reserved.