Patent ID: 7854330
Filing Date: 2010-12-21
Classification: B32B,E02D

Abstract:
1. A reactive geocomposite article for treating contaminants in soil or water comprising: a pre-formed geotextile mat formed by needlepunching non-woven geotextile fibers to a lower water-pervious geotextile cover sheet at a concentration of about 300 to about 450 grams of fibers per square meter of cover sheet surface area prior to adding a powdered or granular reactive material thereto, said mat having a thickness of about 6 mm to about 200 mm, wherein the non-woven fibers have void spaces that provide sufficient porosity to receive a powdered or granular reactive material and the geotextile article remains water-pervious; a powdered or granular reactive material uniformly disposed within at least a portion of the void spaces of the pre-formed geotextile mat, secured against lateral movement and surrounding some of the geotextile fibers of said pre-formed geotextile mat; a water-pervious upper geotextile cover sheet adhered to the upper surface of the pre-formed geotextile mat containing the powdered or granular reactive material by heat sealing the upper geotextile sheet to heat softened upwardly extending fibers of the pre-formed geotextile mat during compression of the outer geotextile sheet onto the heat-softened fibers of the pre-formed needlepunched geotextile mat to densify and confine the reactive material within the geocomposite article, between the lower and upper geotextile cover sheets.