摘要
以铜川煤矿煤矸石为研究对象,通过分拣、破碎,选取粒径为2.36~4.75 mm、4.75~9.5 mm的煤矸石进行试验。将煤矸石集料用钙质溶液浸泡1 h,烘干至恒重,再用硅质溶液浸泡1 h,烘干至恒重,用压碎值表征强度的变化;利用SEM、EDS以及XRD等对试验结果进行评价。结果表明:氯化钙和水玻璃效果明显好于生石灰和硅溶胶;CaCl 2溶液的质量分数为4%,水玻璃溶液的质量分数为6%,在水玻璃中掺入0.75%左右的表面活性剂时,对黏土质煤矸石的强化效果最好;在氯化钙溶液的质量分数为0%~10%范围内,氯化钙浓度越高,耐水性越好。
Taking the coal gangue of Tongchuan coal mine as the research object,the coal gangue with particle size of 2.36-4.75 mm and 4.75-9.5 mm was selected for sorting and crushing.The coal gangue aggregate was soaked in calcium solution for 1 h,dried to constant weight,and then immersed in siliceous solution for 1 h,dried to constant weight,and the crushing value was used to characterize the change of strength.The experimental results were evaluated by using SEM,EDS,XRD,etc.The results show that the effect of calcium chloride and sodium silicate are better than that of quicklime and silica sol.Under the circumstance of the concentration of calcium chloride is 4wt%,the concentration of sodium silicate is 6wt%with 0.75%of surfactant,the strengthening effect of clay coal gangue is best.When the concentration of calcium chloride is 0wt%to 10wt%,the higher the calcium chloride concentration,the better the water resistance.
作者
温久然
刘小婷
刘开平
高妮
钟佳墙
孙志华
王思雨
WEN Jiuran;LIU Xiaoting;LIU Kaiping;GAO Ni;ZHONG Jiaqiang;SUN Zhihua;WANG Siyu(School of Materials Science and Engineering,Chang'an University,Xi'an 710061,China;School of Bridge Engineering,Shaanxi Railway Institute,Weinan 714000,China;Xi'an Tongcheng Building Technology Co.,Ltd.,Xi'an 710077,China)
出处
《硅酸盐通报》
CAS
北大核心
2020年第1期233-241,共9页
Bulletin of the Chinese Ceramic Society
基金
陕西省住房城乡建设厅科研开发建设项目(2017-K58)
中央高校基本科研业务费资助项目(300102318104)
陕西省高性能混凝土工程实验室专项课题(KY2017-036)
大学生创新创业训练计划项目(201910710491)
关键词
煤矸石
氯化钙
水玻璃
压碎值
耐水性
coal gangue
calcium chloride
sodium silicate
crushing value
water resistance
