Volume 37, Issue 5 (September 2014)

    A Full Contact Flexible Mold for Preparing Samples Based on Microbial-Induced Calcite Precipitation Technology

    (Received 13 May 2013; accepted 10 June 2014)

    Published Online: 2014

    CODEN: GTJOAD

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    Abstract

    During microbial-induced calcium carbonate precipitation (MICP), the cementation medium needs to fully contact and react with bacteria inside a soil sample through pores of sand. The goal of this study was to develop a new sample preparation mold, i.e., a full-contact flexible mold, to prepare samples during the MICP process. The mold was constructed using a needle-punched, nonwoven geotextile material. Specimens of different sizes were prepared using the full-contact flexible mold to evaluate the engineering soil properties improved by the MICP process. The results indicated that the mechanical improvement of the MICP-treated soil using the full-contact flexible mold is one order of magnitude higher than that of the typical sample preparation method. The full-contact flexible mold enhances the contact between the bacteria and the cementation medium and promotes homogeneous calcium carbonate precipitation within the sand pores.


    Author Information:

    Zhao, Qian
    Ph.D. Candidate, China Univ. of Geosciences, Beijing, School of Water Sources & Environment, Beijing,

    Li, Lin
    Associate Professor, Jackson State Univ., Department of Civil and Environmental Engineering, Jackson, MS

    Li, Chi
    Professor, Inner Mongolia Univ. of Technology, College of Civil Engineering, Huhhot,

    Zhang, Huanzen
    Professor, China Univ. of Geosciences, Beijing, School of Water Sources & Environment, Beijing,

    Amini, Farshad
    Professor, Jackson State Univ., Department of Civil and Environmental Engineering, Jackson, MS


    Stock #: GTJ20130090

    ISSN: 0149-6115

    DOI: 10.1520/GTJ20130090

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    Author
    Title A Full Contact Flexible Mold for Preparing Samples Based on Microbial-Induced Calcite Precipitation Technology
    Symposium , 0000-00-00
    Committee D18