摘要
通过筛分得到不同颗粒级配的煤矸石,将其与硅酸盐水泥进行混合,得到具有不同颗粒级配的煤矸石-水泥体系。研究了煤矸石-水泥混合体系净浆的工作性能、力学性能及水化程度。结果表明:增加煤矸石中40μm以下颗粒含量有利于提高煤矸石-水泥体系的早期强度,但过多的提高煤矸石中1μm以下颗粒含量未必对提高煤矸石-水泥体系的3d强度有利,合理的颗粒级配很重要;煤矸石中保持一定量的40￣80μm颗粒含量是有必要的,适当增加其含量,有利于减少煤矸石-水泥体系浆体的流动度损失,有利于综合发挥煤矸石在水泥体系中物理堆积作用和火山灰活性作用,提高煤矸石-水泥体系的28d强度及后期强度。
The specimens of sifted coal gangue with different particle size were admixed with Portland cement to prepare the coal gangue-cement system with different grain grade. The workability, mechanical, property and hydration reactivity of coal, gangue-cement system paste were studied. The results suggested that the increasing of the content of the particles less than 40μm of coal gangue were helpful to improve the early strength of coal gangue-cement system, while the particles less than 1μm might be harmful, so the reasonable grain grade was very important. It was necessary for coal gangue to keep a certain amount of the particle from 40μm to 80μm properly to reduce the fluidity loss and promote the pile-up density and pozzolana reactivity of coal gangue and improve its 28d strength as well as late strength.
出处
《水泥》
CAS
2006年第10期5-8,共4页
Cement
基金
国家重点基础研究发展规划(973)项目(2001CB610704-2)
武汉市青年科技晨光计划项目(20055003059-31)
