ABSTRACT

The storage of coal mine overburden consumes vast tract of usable land with occasional slope failure and environment pollution of nearby area. In the present study, a comprehensive laboratory investigation to develop a controlled low-strength material (CLSM) using the coal mine overburden shale as the base material and fly ash and cement as the cementitious material is presented. Several CLSM mix designs were tested for compressive strength, water absorption, ultrasonic pulse velocity, slake durability index, and leachability. The CLSM is shown to have self-flowing and self-levelling consistency, low bleeding, low unit weight, good ductility, adequate strength, reasonable durability, and no undesirable leachable constituents. The developed CLSM can be considered as an effective and sustainable construction material, offering significant environmental and economic benefits.

摘要

煤矿覆盖层的存储消耗了大量的可用土地，偶有边坡失稳和附近地区的环境污染。在本研究中，提出了一项综合性的实验室研究，以开发一种以煤矿覆盖层页岩为基础材料，粉煤灰和水泥为胶凝材料的可控低强度材料（CLSM）。测试了几种CLSM混合物设计的抗压强度，吸水率，超声脉冲速度，耐久指数和浸出性。已显示CLSM具有自流平和自流平的一致性，低渗漏，低单位重量，良好的延展性，足够的强度，合理的耐久性，并且没有不良的可浸出成分。所开发的CLSM可以被视为一种有效且可持续的建筑材料，