1. American Coal Ash Association. www.ACAA-USA.org.
2. Coal combustion products;Kalyoncu,2000
3. Pozzolanic and cementitious materials;Malhotra,1996
4. Fly ash in cement and concrete;Helmuth,1987
5. Standard specification for fly ash and raw or calcined natural pozzolan for use as a mineral admixture in portland cement concrete,1996