METHOD FOR MANUFACTURING ARTIFICIAL ULTRA-LIGHTWEIGHT AGGREGATE USING RAW SEWAGE SLUDGE

摘要

This invention relates to a method for manufacturing an artificial ultra- lightweight aggregate having a specific gravity of 0.8-0.9 using raw sewage sludge. According to the invention, raw sewage sludge and water-free waste are mixed into a blend having a water content that allows the optimal extrusion, whereby excellent ultra-lightweig ht aggregate which has low water absorption rate and, low slump loss can be produced. In addition, the collective treatment of waste and the mass production of recycled produc ts are possible without addition of a drying process for raw sewage sludge, and thu s excellent ultra-lightweight aggregate can be supplied at low cost.