Performance of Clay Liner Systems

Waste permeants can affect the magnitude of fluid conductivity of clay used as liner material in disposal containment systems. Due to the complexity of waste streams encountered in disposal practice, it is difficult to tell whether the net effects of actual exposure will increase or decrease the clay's conductivity. To provide information concerning field performance, undisturbed samples of natural clay liner material which had been exposed to various wastes for as long as 8 years have been subjected to physical and chemical testing in the laboratory. Chemical analyses of both waste permeants and clays were performed to evaluate chemical interactions between the permeant and the soil. Results of these tests indicated that laboratory value of fluid conductivity of the clay samples did not significantly increase due to the prolonged field exposure to various wastes.

Related Publications

Finno, R.J. and Schubert, W.R. (1986), "Clay Compatibility in Waste Disposal Practice," J. of Environmental Engineering, ASCE 112, 12, 1070-1084.

Schubert, W.R., Harrington, T. and Finno, R.J. (1984)"Glacial Clay Liners in Waste Disposal Practice," Proceedings of the Specialty Conference on Environmental Engineering, Los Angeles, California , American Society of Civil Engineers, 36-41.

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For more information contact:
Dr. Richard J. Finno