铝粉增强钼尾矿发泡水泥力学性能研究  

Study on Reinforced Mechanical Properties of Molybdenum Tailings Foam Cement by Aluminum Powder

作　　者：郭家林 王之宇 刘明宝 Guo Jialin;Wang Zhiyu;Liu Mingbao(Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,College of Chemical Engineering and Modern Materials,Shangluo University,Shangluo,Shaanxi,China)

机构地区：[1]商洛学院化学工程与现代材料学院陕西省尾矿资源综合利用重点实验室,陕西商洛726000

出　　处：《矿产综合利用》2020年第4期167-171,共5页Multipurpose Utilization of Mineral Resources

基　　金：商洛学院服务地方专项(17SKY-FWDF002);陕西省教育厅服务地方专项计划项目(18JC010)。

摘　　要：以钼尾矿和PC 32.5水泥质量比2:3为原料制备钼尾矿发泡水泥,对铝粉增强发泡水泥的力学性能进行研究,利用XRD和SEM对水化产物的矿物组成和微观形貌进行了表征。结果表明:铝粉对钼尾矿发泡水泥力学性能增强显著,铝粉掺量0.2‰时制备的钼尾矿发泡水泥力学性能较佳,28 d抗压强度提高28.9%,抗压强度为1.07 MPa,干密度为397.9 kg/m^3;制品中最终水化产物主要为托贝莫来石和C-S-H凝胶。The foam cement was prepared using molybdenum tailings and cement(PC32.5)as the main raw materials(mass ratio:2:3).The mechanical properties of molybdenum tailings foam cement(MTFC)reinforced by aluminum powder were studied.The mineral composition and microstructure of hydration products were characterized by XRD and SEM.The results showed that the mechanical properties of MTFC were significantly enhanced by aluminum powder and 0.2‰was the optimum aluminum powder ratio for the molybdenum tailings foam cement with strength of 1.07 MPa and dry density of 397.9 kg/m3 and the compressive strength was improved by 28.9%in 28 days.The final hydration products were mainly tobermorite and C-S-H gel.

关 键 词：铝粉 发泡水泥 C-S-H胶凝 托贝莫来石 

分 类 号：TD989[矿业工程—选矿] TU528.2[建筑科学—建筑技术科学]