Innovative solutions to buried portland cement concrete roadways : first interim report.
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Innovative solutions to buried portland cement concrete roadways : first interim report.

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English
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  • Creators:
    Marquis, Brian
  • Corporate Creators:
    Maine. Dept. of Transportation. Transportation Research Division
  • Subject/TRT Terms:
  • Publication/ Report Number:
    99-11
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Maine
  • Corporate Publisher:
    Maine. Dept. of Transportation
  • Abstract:
    Maine has hundreds of miles of highway that were constructed of Portland Cement

    Concrete (PCC) roughly 6 to 6.1 meters (18 to 20 feet) wide forty or more years ago. Since that

    time these same highways have been paved and widened to 6.7 or 7 meters (22 or 24 feet) with

    hot bituminous pavements to accommodate increased traffic volumes. Bituminous materials

    were used instead of concrete due to the ease of placement and price of material.

    PCC is a rigid pavement capable of supporting weight with little deflection. Hot

    bituminous pavement is flexible and will bend to distribute weight across the roadway. When

    the highway is expanded beyond the concrete slab there is a sharp decrease of support for this

    bituminous pavement resulting in settlement over prolonged use. This settlement may also be

    compounded by poor drainage capabilities of the underlying soils causing the unsupported

    pavement to drop lower than the existing height of the concrete supported pavement. This

    creates a longitudinal crack aligning with the concrete slab edge about 0.3 to 1 meter (1 to 3

    feet) from the right edge of pavement. Pavement to the right of this crack deteriorates to the

    point where maintenance crews attempt to smooth it out with cold patch year after year. Paving

    over the entire roadway is an option but, due to reflective cracking, the edge of pavement begins

    to deteriorate within 2 or 3 years.

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