水泥稳定石墨尾矿砂的路用性能试验研究
Experimental research on road performance of graphite tailings sand stabilized with cement
李智民 1徐钦 1王泽磊 1李思瑶 1王福彤1
作者信息
- 1. 黑龙江大学 建筑工程学院,黑龙江 哈尔滨 150080
- 折叠
摘要
石墨尾矿大量堆积引发了一系列的危害,包括环境污染、水资源受损以及地质灾害风险增加等.使用水泥稳定石墨尾矿砂作为路基材料,不仅可以提高石墨尾矿砂的综合利用率,还可以降低施工成本.本文探讨了水泥掺量对水泥稳定石墨尾矿砂抗压强度和抗冻性能的影响.结果表明:水泥稳定石墨尾矿砂试件的抗压强度随着水泥掺量的增加而增加;当水泥掺量为 7%时,水泥稳定石墨尾矿砂试件 7 d龄期的抗压强度达到了 2.61 MPa;随着冻融循环次数的增加,水泥稳定石墨尾矿砂试件的质量损失率逐渐增大,抗压强度逐渐减小;水泥掺量越大,水泥稳定石墨尾矿砂试件抵抗冻融的能力就越强.研究结果可为中国东北地区使用水泥稳定石墨尾矿砂作为路基材料提供参考.
Abstract
The accumulation of graphite tailings has brought a series of hazards,including environmental pollution,water resource damage,and increased risk of geological disasters.Using cement-stabilized graphite tailings sand as a subgrade material not only enhances the comprehensive utilization of graphite tailings sand,but also reduces construction costs.This study investigates the impact of cement content on the compression strength and freeze-thaw resistance of cement-stabilized graphite tailings sand.The results show that the compression strength of cement-stabilized graphite tailings sand specimens increases with the cement content.When the cement content is 7%,the 7-day compression strength of the cement-stabilized graphite tailings sand specimens reaches 2.61 MPa.With the increase of freeze-thaw cycles,the mass loss rate of the cement-stabilized graphite tailings sand specimens gradually increases,while their compression strength gradually decreases.The higher the cement content,the stronger the freeze-thaw resistance of the cement-stabilized graphite tailings sand specimens.The research findings can serve as a reference for using cement-stabilized graphite tailings sand as a subgrade material in Northeast China.
关键词
石墨尾矿砂/水泥/路基材料/含水率/强度性能/冻融循环Key words
graphite tailings sand/cement/subgrade material/water content/strength properties/freeze-thaw cycles引用本文复制引用
出版年
2024
NETL
NSTL
万方数据