CONSTRUCTION MATERIAL FROM CHEMICALLY ACTIVATED FLY ASH

Out of 50 million tons of fly ash generated each year in the United States, only27% is reused or recycled. The remaining 73% is landfilled which presentspotential environmental problems in the future. This projects main objective isto develop a new class of construction material from the Chemically Activated FlyAsh (CAFA) in conjunction with fine and coarse aggregates, and determinepertinent mechanical and environmental properties of the final product. Theinformation in this investigation will provide information needed to create aproduction process most suitable both technically and economically. Preliminaryresults reveals that is material reaches compressive strength of 6,000 psi after2 hours and an ultimate strength of 13,000 psi after one day. Typically portlandcement concrete requires 28 days to reach the same strength level that CAFAmaterial achieves after 2 hours. Economic analysis of this material indicatedthat the cost of this material is significantly less than comparable strengthportland cement material on the market.