摘要
煤制油炉渣是煤化工产业的新型固体废弃物,现有的堆存处理对环境污染较大,给煤炭企业带来了很大的环保压力,亟需探寻煤制油炉渣的综合利用方法。本文借鉴工业废渣制备混凝土的经验,开展了煤制油炉渣替代混凝土细骨料的试验,在不同水灰比条件下,用煤制油炉渣分别以20%、40%、60%、80%和100%的比例替代混凝土的细骨料,测试混凝土材料的坍落度、初凝时间和单轴抗压强度。由于煤制油炉渣表面粗糙、含有短纤维和吸水率略高等特点,煤制油炉渣替代细骨料对于混凝土的工作性能有不良影响,不同比例的煤制油炉渣替代河砂后,混凝土的坍落度出现降低,初凝时间有所缩短,但单轴抗压强度出现不同程度的增长。试验结果表明,水灰比为0.40、0.43和0.46的煤制油炉渣混凝土满足C30等级强度要求,水灰比为0.49的煤制油炉渣混凝土满足C25等级强度要求,说明煤制油炉渣开发混凝土材料具有可行性,为煤制油炉渣固废资源化利用提供了新途径。
Coal liquefaction slag is a new type of solid waste in coal chemical industry.The existing stacking treatment has great environmental pollution and brought great environmental pressure to coal enterprises.It is urgent to explore the comprehensive utilization method of coal to coal liquefaction slag.Based on the experience of preparing concrete with industrial waste slag,the experiment of replacing concrete fine aggregate with coal liquefaction slag was carried out.Under different water cement ratio conditions,the proportion of coal liquefaction slag is 20%,40%,60%,80%and 100%,respectively.The slump,initial setting time and uniaxial compressive strength of concrete were tested.Due to the characteristics of rough surface,short fiber and slightly high water absorption rate of coal liquefaction slag,the replacement of fine aggregate by coal liquefaction slag has a negative impact on the working performance of concrete.After replacing river sand with coal tar furnace slag in different proportions,the slump of concrete decreases,the initial setting time is shortened,but the uniaxial compressive strength increases in different degrees.The concrete with water cement ratio of 0.40,0.43 and 0.46 can meet the strength requirements of C30 grade,and the concrete with water cement ratio of 0.49 can meet the strength requirement of C25 grade.The test results show that it is feasible to develop the concrete material from coal liquefaction slag,which provides a new way for the utilization of solid waste from coal liquefaction slag.
作者
曹雯
张明磊
高林生
CAO Wen;ZHANG Minglei;GAO Linsheng(School of Geological Engineering,Institute of Disaster Prevention,Sanhe 065201,China;Key Laboratory of Building Collapse Mechanism and Disaster Prevention,China Earthquake Administration,Sanhe 065201,China;School of Safety Engineering,North China Institute of Science and Technology,Sanhe 065201,China)
出处
《中国矿业》
2022年第1期95-100,共6页
China Mining Magazine
基金
中国地震局建筑物破坏机理与防御重点实验室开放基金项目资助(编号:FZ201207)
廊坊市科技局科学研究与发展计划自筹经费项目资助(编号:2020013046)
中央高校基本科研业务费项目资助(编号:2020013046)。
关键词
煤制油炉渣
混凝土
细骨料
替代率
性能参数
coal liquefaction slag
concrete
fine aggregate
replacement rate
performance parameter
