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Stabilization of Coal Mine Waste and Its Practical Application as a Road Subgrade

机译：煤矿废物稳定及其作为道路路基的实际应用

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A developing country like Bangladesh is establishing many power plants where coal is being used as a primary fuel. The generation of coal waste is increasing with the mining of coal, which may cause an adverse environmental effect. So, it is required to be managed in a proper manner, such as reuse and recycle the coal waste. The objective of this study is to investigate the significance of coal waste used as a road subgrade. Due to the lack of some physical and strength properties, the waste cannot be used directly as a subgrade. So, the investigation was done to stabilize the fresh coal waste with different percentages of fly ash such as 0%, 10%, 12% and 15% to justify the suitability of its intended use. It is found that with the increasing percentages of fly ashes, the plasticity index reduces significantly. With the addition of fly ash, the dry density increases, while the optimum moisture content decreases significantly. After analyzing the test result, it is found that coal waste with 15% fly ash having unconfined compressive strength and CBR value is 17.79 psi and 23.12% respectively which is sufficiently significant for use as road subgrade.
机译：像孟加拉国这样的发展中国家正在建立许多发电厂，其中煤被用作主要燃料。煤矸石的产生随着煤炭的开采而增加，这可能导致环境影响不良。因此，需要以适当的方式管理，例如重用和再循环煤矸石。本研究的目的是调查煤矸石作为道路路基的意义。由于缺乏一些物理和强度性质，浪费不能直接用作路基。因此，调查是为了使新鲜煤矸石的粉煤灰稳定，如0％，10％，12％和15％，以证明其预期用途的适用性。结果发现，随着飞煤的百分比增加，可​​塑性指数显着降低。随着粉煤灰的添加，干密度增加，而最佳水分含量显着降低。在分析试验结果后，发现具有15％粉煤灰的煤矸石具有不包含狭窄的抗压强度和CBR值的粉煤灰是17.79psi和23.12％，其与道路路基充分显着。

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