摘要
为解决煤炭开采过程中的固体废弃物处理问题和天然骨料供给不足的问题.本文采用正交试验法设计试验,通过控制水灰比、钢纤维含量和煤矸石粒径3个因素制作预制混凝土砌块,对制作的砌块进行单轴抗压试验然后对所得的抗压强度数据进行分析,以此研究水灰比、钢纤维含量和煤矸石粒径3个因素对预制混凝土砌块强度的影响,确定最佳预制混凝土砌块配合比,为煤矸石集料混凝土的实际应用提供一定的思路.结果表明:预制混凝土砌块其抗压强度会随水灰比增加而快速减小,随着钢纤维含量的增加会先增大然后减小,随着煤矸石粒径的增大缓慢减小.预制混凝土砌块的最优配合:水灰比45%,钢纤维含量1%,煤矸石粒径5~8 mm,质量配比为220∶489∶1015∶676∶24(m水∶m水泥∶m煤矸石∶m砂子∶m钢纤维).
To address the issues of solid waste disposal in the coal mining process and a scarcity of natural aggregates,the orthogonal experimental approach is utilized in this research to construct trials to create precast concrete blocks while regulating three factors,namely water-cement ratio,steel fiber percentage,and gangue particle size.The fabricated blocks are subjected to a uniaxial compressive test,and the compressive strength data obtained are analyzed to investigate the effect of three factors,water-cement ratio,steel fiber content,and gangue particle size,on the strength of precast concrete blocks,to determine the best precast concrete block ratio,and to provide some ideas for the practical application of coal gangue aggregate concrete.Results reveal that the compressive strength of precast concrete blocks drops rapidly as the water-cement ratio increases,increases initially and subsequently decreases as the steel fiber content increases,and reduces slowly as the gangue particle size grows.Precast concrete blocks with an appropriate water-cement ratio of 45%,a steel fiber content of 1%,and gangue particle size 5 to 8 mm with the quality ratio of water to cement to gangue to sand to steel fiber equal 220 to 489 to 1015 to 676 to 24.
作者
魏明星
朱永建
任恒
李鹏
张玉群
廖洪波
赵俊
吴寻云
WEI Mingxing;ZHU Yongjian;REN Heng;LI Peng;ZHANG Yuqun;LIAO Hongbo;ZHAO Jun;WU Xunyun(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines,Hunan University of Science and Technology,Xiangtan 411201,China;Fujian Provincial Academy of Safety Science and Technology,Fuzhou 350003,China;Xiaohezui Coal Mine,Sichuan Chuanmei Huarong Energy Co.,Ltd.,Dazhou 635000,China)
出处
《矿业工程研究》
2022年第4期65-71,共7页
Mineral Engineering Research
基金
国家自然科学基金面上资助项目(51774130,52174110)
湖南省自然科学基金面上资助项目(2021JJ30273)。
关键词
煤矸石
配合比
正交试验法
改性混凝土
集料
coal gangue
mix ratio
orthogonal experimental method
modified concrete
aggregate
