Journal Published Online: 30 March 2005
Volume 28, Issue 3

Collapse Behavior of Compacted Coal Ash Fills

CODEN: GTJODJ

Abstract

Coal ash is widely used in construction of embankments and fills. Compacted coal ash fills are likely to undergo collapse on inundation due to rise of water table or infiltration of rainwater. This paper brings out various factors influencing collapse potential of coal ash. Single oedometer and double oedometer collapse tests and plate load collapse tests were carried out on compacted fly ash (FA), bottom ash (BA), and mixture of fly ash and bottom ash in equal proportion (FA50 + BA50). The results reveal that fly ash is susceptible to collapse, while bottom ash and FA50 + BA50 show negligible collapse. However, a plate load collapse test conducted on compacted ash bed of FA50 + BA50 shows large settlement of plate on inundation. This suggests that the use of the results of single oedometer collapse tests can help estimate only that component of settlement of footing or test plate that is due to compression of the test bed on inundation, and not the total settlement that is due to both collapse compression and shear deformation of the loaded bed.

Author Information

Pusadkar, SS
Government College of Engineering, Amravati, India
Ramasamy, G
Indian Institute of Technology, Roorkee, India
Pages: 8
Price: $25.00
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Details
Stock #: GTJ12466
ISSN: 0149-6115
DOI: 10.1520/GTJ12466