RESEARCH ON SINTERED FLY ASH AGGREGATE OF HIGH STRENGTH AND LOW ABSORPTION OF WATER

摘要

Research on a sintered fly ash aggregate is presented. The aggregate was manufactured through material orthogonal test and quick chilled firing schedule test. It displayed high strength (7.8 Mpa) and low water absorption (4.2%). Lightweight aggregate concrete made with this aggregate reached compressive strength more than CL60, slump over 20 cm, 60 minutes slump loss less than 2 cm, and expansibility higher than 50 cm. Such properties meet the modern concrete requirements for high strength and pump-ability. This new technology has important economic and social impacts on the use of industrial waste residue and on the environmental protection.