In this work, calcium carbide residue (CCR) and water treatment residue (WTR) were used in combination with clay to produce a composite bottom clay liner for sanitary landfills. The effects of these two residues on the performance of a composite bottom clay liner by means of compressive strength development and the coefficient of permeability were studied. The WTR was classified as high plasticity silt according to the Unified Soil Classification System and was used to replace clay with clay:WTR ratios of 0:100, 30:70, 50:50, 70:30, and 100:0, whereas CCR was used at 0, 10, 20, and 30 wt%. The experimental results showed that the optimum mix proportions of a composite clay liner containing clay, WTR, and CCR at 40, 40, and 20 wt% gave a 56‐day compressive strength of 2.95 MPa and a coefficient of permeability value of 6.6 × 10⁻⁸ cm/s.

中文翻译：

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重复利用城市固体垃圾填埋场底部粘土衬里的电石和水处理残留物

在这项工作中，将电石渣（CCR）和水处理渣（WTR）与粘土结合使用，以生产用于卫生垃圾填埋场的复合底部粘土衬里。通过抗压强度的发展和渗透系数研究了这两种残留物对复合底粘土衬砌性能的影响。根据统一土壤分类系统，WTR被归类为高塑性淤泥，用于以0：100、30：70、50：50、70：30和100：0的粘土：WTR比率代替粘土，而CCR以0、10、20和30wt％使用。实验结果表明，含有40％，40％和20％（重量）的粘土，WTR和CCR的复合粘土衬砌的最佳混合比例可得出56天的抗压强度为2.95 MPa，渗透系数值为6.6×10^-8厘米/秒。