Effect of electrolyte concentrations on swelling behaviour of sand- and marble dust-bentonite mixes

Abstract

The major concern of the impermeable landfill liner design is to retard the passage of pollutants to the ground water. So, for waste management purposes various environmental regulations are to be followed for the design of landfill liner. Sand-bentonite mixture generally used as a liner or barrier material in waste contaminates sites. Permeability, plasticity and swelling are the most important criteria’s of sand-bentonite mixture to design the liner of the waste contaminates sites. The electrolyte concentration in the pore fluid also affects the geotechnical properties of sand-bentonite mixture which ultimately impact on the regulation of the liner material. The present study attempts to investigate the effect of electrolyte concentration on swelling of sand-bentonite and marble dust bentonite mixtures.