METHOD OF RECYCLING ASH ARISING FROM THE INCINERATION OF REFUSE, SEWAGE SLUDGE AND TOXIC WASTE

摘要

The invention concerns the production of synthetic aggregate for use in the building industry and in underground mining and tunnel construction. The aggregate is produced by mixing the waste ash with cement, wetting with water, compressing and allowing to harden. The ash, produced in the form of filter dust, furnace ash or granular material by incineration at over 700 C, is ground alone or mixed with Portland clinker or Portland cement or another, organic, binder. The ground ash is then wetted by adding 0-20 % water, relative to the solids content, and agglomerated. Additional water is added to the mixture, which is then set and used as aggregate.