Volume 1, Issue 6 (June 2004)

    Flowable Fill Using Flue Gas Desulfurization Material

    (Received 22 April 2003; accepted 23 September 2003)

    Published Online: 2004

    CODEN: JAIOAD

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    Abstract

    Flowable fills are an effective and practical alternative to commonly used compacted earth backfills. Flowable fill is a cementious material, commonly a blend of cement, fly ash, sand, and water, that does not require compaction, may be self-leveling at time of placement, may harden quickly within a few hours, and can be excavated in the future if need be. Many flue gas desulfurization (FGD) materials have low unit weight and good shear strength characteristics and thus hold promise for flowable fill applications. This paper focuses on the potential of using two types of FGD materials (spray dryer and wet fixated FGD material) in flowable fill as a replacement for conventional fly ash. Several design mixes were considered. The design mixes consisted of varying amounts of FGD material, cement, lime, and water. The mixes were tested in the laboratory for flowability, unit weight, moisture content, unconfined compressive strength, erodibility, set-time, penetration, and long-term strength characteristics. Tests were conducted for up to 90 d of curing. Without any additives, the FGD material was observed to be as good as a regular (normal set) flowable fill in terms of placeability, unconfined compressive strength, and diggability. FGD material flowable fill with additives and admixtures compares favorably with the characteristics of conventional quick set flowable fills.


    Author Information:

    Butalia, TS
    Research Scientist, The Ohio State University, Columbus, OH

    Wolfe, WE
    Professor, The Ohio State University, Columbus, OH

    Zand, B
    Graduate Research Assistant, The Ohio State University, Columbus, OH

    Lee, JW
    Graduate Research Assistant, The Ohio State University, Columbus, OH


    Stock #: JAI11868

    ISSN: 1546-962X

    DOI: 10.1520/JAI11868

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    Author
    Title Flowable Fill Using Flue Gas Desulfurization Material
    Symposium Innovations in Controlled Low-Strength Material (Flowable Fill), 2003-06-10
    Committee D18