Abstract

Bentonite is a material with low permeability and as such is the preferred material for impervious layer in a refuse landfill. Given the multi-scale structure of the bentonite, contaminant transport in it is a very complex process. In fact, it is coupled with consolidation. The coupling effect affects the contaminant transport by changing the inherent transport feature. In addition, the bentonite clay liner is usually unsaturated. In this article, the mixture theory is used as a framework that describes the transport phenomena and the interactions of the unsaturated bentonite under the multi-field coupling effect. It is also a valuable reference for simulating the contaminant transport in bentonite clay liners.

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