Abstract: An improved method of manufacturing geosynthetic clay liners is provided. The method of manufacture enables the construction of a structurally sound liner without the use of glue or adhesive and further without the use of needle punching or quilting. The method of manufacture also eliminates the need for any subsequent drying step. Water in combination with compression is used to adhere the granular bentonite layer to the inside surfaces of the cover sheet and the primary carrier sheet and further to provide structural ability to the bentonite layer itself.

Abstract: A geosynthetic clay liner with a low permeability or controlled permeability intermediate sheet is provided. The liner includes two outer sheets with two layers of bentonite and an intermediate sheet disposed therebetween. The intermediate sheet may be rippled or deformed to enhance the structural stability of the liner. The intermediate sheet may be chosen from a material with low or ultra-low permeability characteristics or may be chosen from a material with controlled or directional permeability characteristics.

Abstract: A flexible clay liner in roll form for use on steep slopes. The liner includes a layer of geotextiles. The geotextiles are stitched together in rows of stitches which extend along the length of the liner. The thread used to make the stitching is a multifilament thread treated with a resin to prevent wicking through the liner. The spacing of the rows of stitches and the frequency of stitches along the rows are sufficient to transfer shear stresses through the bentonite layers, thus preventing the bentonite from becoming a shear plane.

Abstract: A geosynthetic clay liner with a low permeability or controlled permeability intermediate sheet is provided. The liner includes two outer sheets with two layers of bentonite and an intermediate sheet disposed therebetween. The intermediate sheet may be rippled or deformed to enhance the structural stability of the liner. The intermediate sheet may be chosen from a material with low or ultra-low permeability characteristics or may be chosen from a material with controlled or directional permeability characteristics.

Abstract: An improved method of manufacturing geosynthetic clay liners is provided. The method of manufacture enables the construction of a structurally sound liner without the use of glue or adhesive and further without the use of needle punching or quilting. The method of manufacture also eliminates the need for any subsequent drying step. Water in combination with compression is used to adhere the granular bentonite layer to the inside surfaces of the cover sheet and the primary carrier sheet and further to provide structural stability to the bentonite layer itself.

Abstract: A flexible clay liner in roll form for use on steep slopes. The liner includes a layer of geotextiles. The geotextiles are stitched together in rows of stitches which extend along the length of the liner. The thread used to make the stitching is a multifilament thread treated with a resin to prevent wicking through the liner. The spacing of the rows of stitches and the frequency of stitches along the rows are sufficient to transfer shear stresses through the bentonite layers, thus preventing the bentonite from becoming a shear plane.