초록 ▼

A cap for sealing waste in a landfill is prepared by disposing a fill layer atop the waste and applying a fast-curing elastomeric material to the fill layer to provide a monolithic, continuous, elastomeric coating thereupon. The elastomeric material is derived from the reaction of an isocyanate-term

A cap for sealing waste in a landfill is prepared by disposing a fill layer atop the waste and applying a fast-curing elastomeric material to the fill layer to provide a monolithic, continuous, elastomeric coating thereupon. The elastomeric material is derived from the reaction of an isocyanate-terminated compound having at least two reactive isocyanate groups and an amine-terminated compound having at least two reactive amine groups. The elastomeric layer is preferably covered with a porous drainage layer which is in turn covered with a layer of soil.

대표청구항 ▼

A cap for sealing waste in a landfill, said cap comprising: a low hydraulic conductivity fill layer disposed atop a body of waste retained in said landfill; a porous membrane disposed atop said low hydraulic conductivity fill layer; an elastomeric coating disposed upon said porous membrane, said coa

A cap for sealing waste in a landfill, said cap comprising: a low hydraulic conductivity fill layer disposed atop a body of waste retained in said landfill; a porous membrane disposed atop said low hydraulic conductivity fill layer; an elastomeric coating disposed upon said porous membrane, said coating comprising the reaction product of an isocyanate-terminated compound having at least two reactive isocyanate groups and a compound including at least two active hydrogen; and a layer of soil covering said elastomeric coating. A method of sealing waste in a landfill comprising the steps of: disposing a fill layer over a body of waste retained in said landfill; laying a porous membrane sheet over said fill layer substantially fully covering said fill layer; spraying a liquid, fast-curing elastomeric material over said porous membrane sheet, fully covering said porous membrane sheet and forming a continuous, monolithic, elastomeric coating over said sheet, wherein the fast-curing elastomeric material is prepared by rapidly mixing and initiating the reaction of an isocyanate-terminated compound having at least two reactive isocyanate groups and a compound including at least two active hydrogens immediately before spraying the fast-curing elastomeric material; and allowing the fast-curing elastomeric material to cure, forming said continuous, monolithic, elastomeric coating over said sheet.