Investigations on mineralogical characteristics and feasibility of coal gangue as a concrete aggregate from guizhou province, China.

44 indicated that CG could meet the requirements of concrete aggregates, but the compressive strength showed a decreasing trend; Khazaleh et al. 45 used CG from Neyveli Lignite Company in Tamil Nadu, India to replace 25% natural aggregates in the preparation of concrete, which would not change the strength parameters required for M30 grade; Wang et al. 46 believed that using coarse CG aggregate and fine CG aggregate to produce Grade 30 concrete was feasible; Zhou et al. 20 used CG from Qinghemen Mine of Northeast Fuxin Mining Group to replace 25% of natural gravel to make concrete, and the compressive strength reached the design requirements of C30 strength grade concrete.

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