摘要
为更好研究机制砂的合理应用,选取了3种不同岩性的机制砂,通过分级筛分后调配成Ⅱ区中砂,设计了三种不同级配的机制砂。研究了不同机制砂的化学组成、矿物组成和微观形貌,以及不同机制砂对胶砂性能的影响。研究表明:不同机制砂颗粒的长径比和圆形度有一定的差异,个别粒级的参数差异较大;级配对钙基机制砂胶砂强度影响没有硅基机制砂显著;细度模数较大时,钙基机制砂胶砂强度大于硅基机制砂。
In order to study the reasonable application of machine-made sands,3 kinds of machine-made sands with different lithology were selected and mixed into the middle sands of AreaⅡthrough classification and screening,and three different gradations of machine-made sands were prepared.The influence on the properties of mortar of the chemical composition,mineral composition,and micro-morphology of machine-made sands,different machine-made sands were analyzed.The results indicate that the slenderness ratio and roundness of different machine-made sands are different,and the parameters of individual grades are also different.The effect of gradation on the strength of silicon-based sands is more significant than that of calcium-based sands.When the fineness modulus is larger,the strength of calcium-based machine-made sand is higher than that of silicon-based machine-made sand.
作者
孙星海
刘泽
王军伟
姜启衎
SUN Xing-hai;LIU Ze;WANG Jun-wei;JIANG Qi-kan(Research Institution of Concrete and Eco-Materials,School of Chemical and Environmental Engineering,China University of Mining and Technology,Beijing 100083,China;China Railway Inspection and Certification Center Co.,Ltd.,Institute of Standard Metrology,China Academy of Railway Sciences Group Co.,Ltd.,Beijing 100081,China)
出处
《混凝土与水泥制品》
2021年第1期85-89,共5页
China Concrete and Cement Products
基金
北京市自然科学基金项目(2192047)
中国矿业大学(北京)越崎青年学者基金项目(2019QN10)。
关键词
机制砂
微观结构
胶砂
级配
强度
Machine-made sand
Microstructure
Mortar
Gradation
Strength
