THE METHOD OF PREPARING LIGHTWEIGHT-AGGREGATE FOR CONCRETE PRODUCTS USING SLUDGE OF DYEING-WASTE WATER

摘要

PURPOSE: A manufacturing method of light weight aggregate for concrete products using dyeing wastewater sludge is provided to enhance compressive strength of light weight aggregate by iron. CONSTITUTION: A manufacturing method of light weight aggregate for concrete products using dyeing wastewater sludge comprises the following steps: mixing 48-80 parts by weight of clay, 18-50 parts by weight of dyeing waste sludge which contains coagulant of titanate and iron salt, 0.1-10 parts by weight of quicklime, and 0.1-10 parts by weight of sodium carbonate; adding 20-30 parts by weight of water based on 100 parts by weight of the mixture and plasticizing the mixture; obtaining a spherical shaped molded product in drum or disc molding method after extruding the plasticized mixture; drying the spherical shaped molded body at 100-200 deg. Celsius for 2-24 hours and at the percentage of water content of 1-10 weight%; and sintering the dried molded product at 800-1150 deg. Celsius at the ramp-up rate of 3 deg. Celsius/min for 3 hours.