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    Volume 38, Issue 4 (July 2015)

    A Laboratory Study on the Shear Behavior of Mixtures of Coal Wash and Steel Furnace Slag as Potential Structural Fill

    (Received 5 March 2014; accepted 14 April 2015)

    Published Online: 15 July 2015

    CODEN: GTJODJ

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    Abstract

    The accumulation of industrial waste materials (e.g., coal wash and steel furnace slag) has become a critical environmental problem in Australia in recent years. The possible re-use of these types of materials as structural fill for transport embankments and land reclamation is one of the preferred options from a waste management perspective. Consequently, an experimental testing program was undertaken using the triaxial apparatus to evaluate the shear behavior of compacted mixtures of coal wash (CW) and steel furnace slag (SFS). The effect of varying the confining pressure and the percentage of coal wash on the isotropic compression line, the stress-strain behavior, and particle degradation during drained shearing was evaluated. The percentage of coal wash was found to influence the shearing behavior of the CW-SFS mixtures. When the content of coal wash increased, the shear strength of the CW-SFS mixtures decreased and the axial strain corresponding to the peak stress ratio increased. Moreover, the incidence of particle breakage increased for those mixtures with a higher CW content due to the low particle strength of CW. This paper also provided a non-linear strength envelope and a corresponding empirical equation to capture the shear strength of CW-SFS mixtures.


    Author Information:

    Tasalloti, Seyed M. A.
    Ph.D. candidate, Centre for Geomechanics and Railway Engineering, Univ. of Wollongong, Wollongong,

    Indraratna, Buddhima
    Professor of Civil Engineering, Director, Centre for Geomechanics and Railway Engineering, Univ. of Wollongong, Wollongong,

    Rujikiatkamjorn, Cholachat
    Associate Professor of Civil Engineering, Faculty of Engineering, Centre for Geomechanics and Railway Engineering, Univ. of Wollongong, Wollongong,

    Heitor, Ana
    Lecturer, Centre for Geomechanics and Railway Engineering, Univ. of Wollongong, Wollongong,

    Chiaro, Gabriele
    Formerly Centre for Geomechanics and Railway Engineering, University of Wollongong,


    Stock #: GTJ20140047

    ISSN:0149-6115

    DOI: 10.1520/GTJ20140047

    Author
    Title A Laboratory Study on the Shear Behavior of Mixtures of Coal Wash and Steel Furnace Slag as Potential Structural Fill
    Symposium ,
    Committee D18