Stabilization of coal wastes and coal combustion byproducts
AssigneeBoard of Trustees of Southern Illinois University
InventorYoginder P. Chugh
Life of this patent
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Abstract
A fill material mix that includes coal processing wastes, at least one coal combustion by-product and a neutralizing/stabilizing by-product that may be the same as or different than the coal combustion by-product is mixed with water to form a mortar. The mortar can be placed in abandoned mines and other appropriate underground or surface locations as a fill material that is environmentally more benign that the individual components of the mix. The mortar cures rapidly to provide a surface that can support heavy equipment.
Claims38
A fill material consisting essentially of waste coal from coal processing waste, and a by-product composition selected from the group consisting of (a) at least one coal combustion by-product, at least one of which is a neutralizing/stabilizing by-product and (b) a combination of at least one coal combustion by-product and a neutralizing/stabilizing by-product that is not a coal combustion by-product.
A fill material comprising, by weight, from about 25% to about 60% coal processing waste and about 40% to about 75% by-product composition, wherein the coal processing waste comprises waste coal and the by-product composition is at least one coal combustion by-product, at least one of which is a neutralizing/stabilizing by-product.
A fill material comprising waste coal from coal processing waste, and a by-product composition selected from the group consisting of (a) at least one coal combustion by-product, at least one of which is a neutralizing/stabilizing by-product and (b) a combination of at least one coal combustion by-product and a neutralizing/stabilizing by-product that is not a coal combustion by-product, the fill material being free of Portland cement and substantially free of any acid or base that is not a coal combustion by-product or a neutralizing/stabilizing by-product.
Dependencies are inferred from the claim text.