Investigation of Enhanced Landfill Liners Using Kuttanad Clay

Abstract

Landfill liners are layers of materials used to protect soil and groundwater from contaminants. A study aims to improve the performance and effectiveness of these liners by using bentonite and fly ash as amending materials. The research aims to contribute to the sustainable waste management practices by offering cost-effective and environmentally friendly alternatives for landfill liner construction. By using locally available materials, the proposed amended liners can reduce dependency on imported materials and minimize the environmental footprint associated with conventional liner systems. The study investigates the synergistic effect of bentonite and fly ash as amending materials for improving the mechanical and hydraulic characteristics of Kuttanad clayey soil. In economic view, to maximize the usage of fly ash, bentonite can be replaced up to 30%. This mix is found to be suitable amended soil liner with a coefficient of permeability value which satisfies the permeability criteria of landfill liner.