Published Paper Details:

Abstract:Over last few years, Geo-synthetic clay liners have gained widespread popularity as substitute for compacted clay liners in cover systems and composite bottom liners. A geosynthetic clay liner is a factory produced mineral sealing mat which mostly consists of two layers of non-woven geotextile with on intermediate layer of sodium bentonitepowder.Geo-synthetic clay liners are mainly used for landfill copings, sealing ponds, bottom and to seal for wastes. Geo-synthetic clay liner must be properly designed in a manner consistent with anticipated field condition, Mechanical and hydraulic forces various criteria like hydraulic conductivity , chemical stability and strength parameters must be consider for designing the geosynthetic clay liners .This paper presents many key design criteria that should be addressed for proper hydraulic and mechanical performance of geo-synthetic clay liner such as calculation of leakage rates and shear stability. There are other factors like effects of confining stresses on permeability, freeze/ thaw cycling stability evaluation and cation exchange which will be presented as well . Geosynthetic clay liners considered here are products fabricated using a bentonite clay layer sandwiched between geotextiles or to a geo-membrane.This paper also presents the construction guidelines for geosynthentic clay liners