Volume 2, Issue 1

    Effect of Fly Ash on Cement Admixture for a Low Plasticity Marine Soil

    (Received 7 October 2012; accepted 7 August 2013)

    Published Online: 2013


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    The deep cement mixing (DCM) method is one of the popular methods of ground-improvement techniques for enhancing the bearing capacity and reducing settlements of thick deposits of soft clay with high water content. High cement content, of the order of 10 % to 25 %, are often used in practice. To reduce the requirement of cement, an attempt is made in the present study to replace the cement partially with fly ash, as a fly ash–cement composite. Different percentages of Class F fly ash (10 %, 20 %, and 30 %) to Ennore marine clay with different proportions of cement (10 %, 15 %, and 20 %) were added and tested. The optimum clay water content at which maximum strength is achieved was determined for various mixes based on unconfined compressive strength tests. A detailed study showed that addition of 20 % Class F fly ash is effective in all combinations. The behavior of the composite under one-dimensional consolidation was also tested.

    Author Information:

    Bushra, I.
    Professor, Dept. of Civil Engineering, TKM College of Engineering, Kollam, Kerala

    Robinson, Retnamony G.
    Associate Professor, Dept. of Civil Engineering, IIT Madras, Chennai,

    Stock #: ACEM20120037

    ISSN: 2165-3984

    DOI: 10.1520/ACEM20120037

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    Title Effect of Fly Ash on Cement Admixture for a Low Plasticity Marine Soil
    Symposium , 0000-00-00
    Committee D18