Immobilization of incinerator ash toxic elements in an environmentally safe soil cement composition and method of manufacture

摘要: A composition, suitable for use as a base in the construction of roads, parking lots, and other areas, is formulated from an ash aggregate comprising municipal solid waste incinerator ash, MSWIA, mixed with material; upon addition cement, compaction curing, volumetrically stable formed. The combined material, crushed, sifted to remove particles having size greater than three eights (3/8") inch prior cement. moisture content mixture aggregate/cement mixtures are carefully adjusted achieve maximum compressive strength. When aggregates containing less 50 percent MSWIA at least 5 cement by dry weight, solids formed within seven days that have strengths excess 300 psi. immobilize heavy metals so leachates EPA toxicity tests concentrations arsenic, barium, chromium, cadmium, lead, mercury, silver selenium allowable materials be classified non-hazardous. process apparatus also described producing compositions.