Characterization of pond ash-bentonite mixes is made to assess their suitability as liner material for waste disposal facilities by examining the relevant index and engineering properties. Further, a comparative assessment is made between sand-bentonite and pond ash-bentonite mixes for the range of bentonite content varying from 0 to 30% by weight at an interval of 5% to ensure an effective substitution of sand with pond ash. Addition of bentonite to sand or pond ash significantly influences the plasticity, strength and permeability properties. Besides, the shape parameters of the coarser fraction and morphology of compacted mixes also influence the engineering properties. A multiple linear regression equation is suggested to predict the hydraulic conductivity of these mixes by considering the basic material properties such as liquid limit, plasticity index and void ratio as an input variable with a correlation coefficient of 0.92 between the measured and predicted hydraulic conductivity values. At comparable conditions, compacted pond ash-bentonite mixes exhibit higher strength but also higher permeability than sand-bentonite mixes. Pond ash-bentonite and sand-bentonite mixes met the liner requirements when compacted with modified Proctor compaction effort at a minimum bentonite content of 20% and 15%, respectively.

中文翻译：

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表征池塘灰烬-膨润土混合物作为垃圾填埋场衬里材料。

通过检查相关指标和工程特性，对池塘灰－膨润土混合物进行表征，以评估其作为废物处理设施的衬里材料的适用性。此外，在膨润土含量范围为0至30重量％之间以5％的间隔变化的情况下，在砂膨润土和池塘灰－膨润土混合物之间进行了比较评估，以确保沙子被池塘灰有效替代。将膨润土添加到沙子或池塘灰中会显着影响可塑性，强度和渗透性。此外，较粗级分的形状参数和压实混合物的形态也会影响工程性能。建议使用多元线性回归方程，通过考虑基本材料特性（例如液体极限，可塑性指数和空隙率作为输入变量，在实测和预测的水力传导率值之间的相关系数为0.92。在可比的条件下，压实的池塘灰-膨润土混合物比砂-膨润土混合物显示出更高的强度和更高的渗透性。当用改良的Proctor压实力进行压实时，粉煤灰膨润土和沙质膨润土混合物满足衬板要求，最小膨润土含量分别为20％和15％。