Journal Published Online: 01 May 1998
Volume 26, Issue 3

Studies of the Specific Gravity of Some Indian Coal Ashes



One of the major problems faced by coal based thermal power stations is handling and disposal of ash. Among the various uses of fly ash, the major quantity of ash produced is used in geotechnical engineering applications such as construction of embankments, as a backfill material, etc. The generally low specific gravity of fly ash resulting in low unit weight as compared to soils is an attractive property for its use in geotechnical applications. In general, specific gravity of coal ash lies around 2.0 but can vary to a large extent (1.6 to 3.1). The variation of specific gravity of coal ash is due to the combination of various factors like gradation, particle shape, and chemical composition. Since specific gravity is an important physical property, it has been studied in depth for three Indian coal ashes and reported in this paper.

Author Information

Pandian, NS
Indian Institute of Science, Bangalore, India
Rajasekhar, C
Indian Institute of Science, Bangalore, India
Sridharan, A
Indian Institute of Science, Bangalore, India
Pages: 10
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Stock #: JTE11990J
ISSN: 0090-3973
DOI: 10.1520/JTE11990J