ARTIFICIAL LIGHT-WEIGHT AGGREGATE METHOD FOR MANUFACTURING THE ARTIFICIAL LIGHT-WEIGHT AGGREGATE

摘要

An object of the present invention is to easily control absolute dry specific gravity when aggregated by steam curing, and in particular, to provide a method for producing a low specific gravity artificial lightweight aggregate and an artificial lightweight aggregate obtained by the method.;The present invention mixes or mixes the siliceous raw material and the calcareous raw material, and then pulverizes, then adds water, slurries and injects into the mold to cure, and then the raw cake cured in a semi-plastic state in the mold to the mesh By cutting or breaking in the longitudinal direction while extruding, and rolling them, followed by steam curing. The steam curing method is carried out by performing high pressure steam curing or high pressure steam curing after atmospheric pressure curing. In addition, calcium oxide is added to the mixture of the siliceous raw material and the calcareous raw material, and a blowing agent is added to the slurry, and further, the amount of the calcined raw material cement, calcium oxide and / or calcium hydroxide is added in an amount of 1 to 50% by weight, respectively. in terms of CaO, and 1 to 50 wt%, or, and the addition amount of calcium sulfate in 0.5 to 10% by weight, in terms of CaSO _4, Ukyi coating the former at the same time the surface property modifying agents (改 質 劑), and thereafter is characterized in a method for producing an artificial lightweight aggregate to steam curing. Moreover, it is characterized by the artificial light weight aggregate obtained by the above-mentioned manufacturing method, and whose absolute dry specific gravity is 0.5-1.5.