不同机制砂微观形貌和胶砂性能研究  

Study on Microstructure and Mortar Properties of Different Machine-made Sands

作　　者：孙星海 刘泽[1] 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)

机构地区：[1]中国矿业大学(北京)化学与环境工程学院混凝土与环境材料研究所,北京100083 [2]中国铁道科学研究院集团有限公司标准计量研究所中铁检验认证中心有限公司,北京100081

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)。

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.

关 键 词：机制砂 微观结构 胶砂 级配 强度 

分 类 号：TU528[建筑科学—建筑技术科学]