Collapse Behavior of Compacted Coal Ash Fills

    Volume 28, Issue 3 (May 2005)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Published Online: 30 March 2005

    Page Count: 8


    Pusadkar, SS
    Lecturer, Government College of Engineering, Amravati,

    Ramasamy, G
    Professor, Indian Institute of Technology, Roorkee,

    (Received 18 December 2003; accepted 24 September 2004)

    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.


    Paper ID: GTJ12466

    DOI: 10.1520/GTJ12466

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    Author
    Title Collapse Behavior of Compacted Coal Ash Fills
    Symposium , 0000-00-00
    Committee D18