[1] [1] DU T, WANG D M, BAI Y J, et al. Optimizing the formulation of coal gangue planting substrate using wastes: the sustainability of coal mine ecological restoration［J］. Ecological Engineering, 2020, 143: 105669.

[2] [2] JABLON＇SKA B, KITYK A V, BUSCH M, et al. The structural and surface properties of natural and modified coal gangue［J］. Journal of Environmental Management, 2017, 190: 80-90.

[6] [6] WANG Z S, ZHAO N. Properties of steel fiber reinforced coal gangue coarse aggregate concrete［J］. Wuhan University Journal of Natural Sciences, 2014, 19(3): 262-268.

[8] [8] WANG J M, QIN Q, HU S J, et al. A concrete material with waste coal gangue and fly ash used for farmland drainage in high groundwater level areas［J］. Journal of Cleaner Production, 2016, 112: 631-638.

[14] [14] SUN K K, ZHOU X M, GONG C C, et al. Influence of paste thickness on coated aggregates on properties of high-density sulphoaluminate cement concrete［J］. Construction and Building Materials, 2016, 115: 125-131.

[18] [18] DU X Q, LI Z L, HAN J J, et al. Effect of different humidity-controlling modes on microstructure and compressive behavior of ordinary concrete［J］. Journal of Materials in Civil Engineering, 2020, 32(1): 04019337.

[19] [19] LEI B, LI W G, TANG Z, et al. Durability of recycled aggregate concrete under coupling mechanical loading and freeze-thaw cycle in salt-solution［J］. Construction and Building Materials, 2018, 163: 840-849.

[20] [20] ZBEK A. Investigation of the effects of wetting-drying and freezing-thawing cycles on some physical and mechanical properties of selected ignimbrites［J］. Bulletin of Engineering Geology and the Environment, 2014, 73(2): 595-609.