Regeneration the coarse aggregate and regeneration production manner null

摘要

PURPOSE:To effectively utilize wastes and reduce the disposal cost by binding fine powder to a crushed material of concrete wastes generated when the concrete of a nuclear power-related facility is demolished via a binder. CONSTITUTION:Concrete is coarsely cracked to about 500mm square by a hydraulic breaker, then the sediment stuck to concrete lumps is removed with a grizzly. The concrete lumps are finely cracked with a jaw crusher to separate reinforcing bars and concrete, and separated reinforcing bars are removed with a magnetic separator. After the removal, the concrete is crushed with a impact crusher to obtain grains with the grain size 0-10mm and 10-40mm. Grains with the grain size 10-40mm are processed with a coarse aggregate reclaimer to obtain reclaimed coarse aggregates. Grains with the grain size 0-10mm are processed with a fine aggregate reclaimer and sifted into reclaimed fine aggregates, fine sand and fine powder. Fine powder cement practically containing no calcium hydroxide is added to the reclaimed coarse aggregates with water used as a binder, and rounded and well-shaped reclaimed coarse aggregates are obtained.