WATER PERMEATION RATE AND WATER RETENTION VALUE CONTROL MATERIAL FORMED BY USING RECYCLED AGGREGATE AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To stabilize a porous structure, to decrease the variations in strength values and to improve water permeability by kneading a hardener and water with recycled aggregate, putting the mixture into a mold and molding the mixture by adding a water permeation rate and water retention value thereto. SOLUTION: The recycled aggregate of a grain size of =1mm regenerated from waste materials, such as concrete scrap, glass scrap, pottery scrap and brick scrap, and cement as the hardener are mixed in such a manner that the compounding ratio attains 2:1 to 8:1 in accordance with the relation between the empirically and experimentally determined coarse grain rate, water permeation rate and water retention value, by which the mixture is obtd. Water is added at 5 to 12wt.% to this mixture and the mixture is kneaded for 3 to 8 minutes and, thereafter, the mixture is put into the mold and is molded to the prescribed shape by imparting the prescribed water permeation rate and water retention value thereto. The molding is cured and released from the mold.