Bottom ash test section evaluation Erwinville, LA.
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Bottom ash test section evaluation Erwinville, LA.



English
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Details:

  • Creators:
  • Corporate Creators:
    Louisiana Transportation Research Center
  • Subject/TRT Terms:
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Louisiana
  • Corporate Publisher:
    Louisiana Transportation Research Center
  • Abstract:
    Bottom ash is a by-product of the energy industry and the residual of burning coal in a kiln

    firing process. Bottom ash is black and the consistency of coarse sand with gravel clinker

    traces. The product is used in other states as embankment material, and this project will

    evaluate the product for use in Louisiana.

    Many laboratory tests were conducted to evaluate the properties of the bottom ash material.

    Those tests included moisture content, standard and modified Proctor, grain size distribution,

    California Bearing Ratio (CBR), nuclear moisture density, direct shear, pH, and resistivity

    tests.

    A test section was constructed with the bottom ash material. The purpose of the test section

    was to evaluate the in-situ properties of the material in the field, the construction techniques,

    and the potential field quality control methods and devices to monitor field construction.

    The results of the Dynamic Cone Penetrometer (DCP) and the nuclear moisture density

    gauge appeared to be the most effective tools in evaluating the material. The DCP results

    were repeatable and closely matched typical values for sand strength/stiffness. The nuclear

    gauge proved to be an appropriate tool for construction control.

    Implementation of the bottom ash material should provide the Louisiana Department of

    Transportation and Development (LADOTD) an effective embankment alternative at a low

    cost. The material also has relatively low density, which could provide another lightweight

    embankment alternative for soft subsurface soils.

    Recommendations include future test sections with field monitoring due to the limited scope

    of the project. A draft specification has been included for review and approval by the chief

    engineer.

  • Format:
    PDF
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  • File Type:
    Filetype[PDF-2.09 MB]

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