American Society of Civil Engineers

Beneficial Properties of Coal Ashes and Effective Solid Waste Management

by K. Prakash, (corresponding author), (Professor, Dept. of Civil Engineering, Sri Jayachamarajendra College of Engineering, Mysore 570 006, India E-mail: and A. Sridharan; formerly, Professor in Civil Engineering, Indian Institute of Science, Bangalore 560 012, India. E-mail:

Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management, Vol. 13, No. 4, October 2009, pp. 239-248, (doi:

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Document type: Journal Paper
Abstract: Large quantities of coal ashes are being produced by coal fired thermal power plants all over the world. Because of some of their inherent properties, the coal ashes are proving to be potential hazardous materials causing environmental pollution. The need of the day is to have practical engineering applications which involve the safe disposal of such so considered hazardous materials. Coal ashes have been shown to have advantageous properties such as low specific gravity, lower compressibility, higher rate of consolidation, high strength, high California Bearing Ratio, high volume stability, water insensitiveness to compaction, and pozzolanic reactivity. Coal ashes can be used as better alternative materials of construction in addition to their bulk use in the field of Geotechnical Engineering. Geotechnical Engineering Practice helps in the safe and effective disposal of coal ashes in bulk in a more ecofriendly way.

ASCE Subject Headings:
Fly ash
Bottom ash
Geotechnical engineering
Material properties
Power plants
Solid wastes
Soil stabilization
Waste management