Abstract: Now a days, it is accepted that the reuse of recycled aggregates from construction and demolition waste in the production of concrete within an acceptable range of substitution of the natural aggregates comes with an economic and environmental benefit. The barrier design for solid waste confinement with a mixture of sand and sodium bentonite has already been studied and showed great results. But for clay to be extracted and transported to disposal sites, the transportation comes with a high price and especially, when it’s not available nearby. This study comes to focus not only on the reuse of the construction and demolition waste but to reduce the cost of the extension of a landfill and the preservation of the soil and water environment. In this study we’ll try to point another use of the recycled construction and demolition waste while extending the capacity of a landfill and construction of the cells. The fines from recycled construction and demolition waste should be used in a mixture with the local soil to enhance its impermeability, to prevent leakage from geomembrane puncturing.