PHYSICAL CHARACTERISATION OF FLY ASH FROM COAL FIRED THERMAL POWER PLANTS, JHARIA COALFIELD, JHARKHANDArvind Kumar Rai and Biswajit PaulAbstract Coal is burned to produce heat which is used to generate electric power. Thermal power plants use pulverised coal as fuel. Fly ash is a solid waste resulting from combustion of coal in thermal power plants at various stages. Thermal power plants produce enormous quantities of fly ash as a by-product of combustion. The huge quantities of fly ash occupy vast land area and its hazardous impact on the environment, is continuously increasing. This paper presents some of the laboratory analysis of fly ash samples collected from two power plants using coal from Jharia coalfield and their adjoining areas. The experiments which were conducted are pH, Conductivity, Specific gravity, Moisture content, Water holding capacity, Bulk density, Void ratio and Porosity. These studies are of great importance in backfilling of opencast mines or reclamation of coal degraded land. It has been observed that use of this fly ash for backfilling of opencast mines has no significant ill effects and may definitely be considered for bulk utilization for mine backfilling.
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