Patent ID: 6648551
Filing Date: 2003-11-18
Classification: B09B,C09K,E02D,Y10S

Abstract:
A method of reducing the permeability or improving the structural integrity of a natural or man-made aggregate of mineral or waste material, wherein said aggregate is selected from the group consisting of an aquifer, a waste-rock pile, a fluid containment system comprised of construction materials, a porous and/or fracture bearing structure, and a geologic stratum adjacent to a coal-bearing stratum, said method comprising the step of introducing reactive material to react to form a substantially insoluble carbonate within pores, spaces, or fractures of said aggregate, wherein said reactive material comprises both aqueous calcium hydroxide and carbon dioxide gas and wherein the insoluble carbonate formed by said method comprises a low permeability cap of interstitial carbonate precipitate over said aggregate.