A high shear strength clay liner comprising two synthetic geotextiles (1a, 1b) and a semihydrated layer (1c) of swellable clay therebetween with fastening means (5) arranged in such a pattern of connecting threads to form pockets (7) through the clay layer. The pattern comprises rows of independent fasteners...http://www.google.es/patents/US5860772?utm_source=gb-gplus-sharePatente US5860772 - High shear strength clay liner, method and apparatus for its production
High shear strength clay liner, method and apparatus for its production
