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Using Foamed Asphalt as a Stabilizing Agent in Full Depth Reclamation of Route 8 in Belgrade: Final Report [March 2009]

File Language:
English


Details

  • Creators:
    Marquis, Brian
  • Corporate Creators:
    Maine. Dept. of Transportation. Transportation Research Division
  • Subject/TRT Terms:
  • Publication/ Report Number:
    02-2
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Maine
  • Corporate Publisher:
    Maine. Department of Transportation
  • Abstract:
    Maine has a variety of soil types throughout the state. A majority of these soil types degrade rapidly and

    have poor stability. To eliminate the cost of supplying quality road base material from a distant source and

    increase the stability of existing soils, the Maine Department of Transportation (MaineDOT) has been

    requiring contractors to rehabilitate roads using the Full Depth Reclamation process.

    Full Depth Reclamation involves milling the existing bituminous pavement plus a portion of the unbound

    base material. The milled material is then graded and compacted. Traffic can use the roadway until a

    bituminous base and wearing surface is applied.

    In addition to using Full Depth Reclaimed material, MaineDOT has been experimenting with adding a

    number of stabilizing agents to virgin or recycled base materials to increase stability. Stabilizing agents

    utilized include cement, emulsion and calcium chloride.

    Foamed Asphalt is another stabilizing agent. This is a mixture of air, water and hot asphalt. Cold water is

    introduced to hot asphalt causing the asphalt to foam and expand by more than 10 times its original

    volume. During this foaming action the asphalt has a reduced viscosity making it much easier to mix with

    aggregates. A specialized piece of equipment mills the existing bituminous pavement and base material

    and introduces Foamed Asphalt all in one process. The material is then shaped to grade and compacted.

    Traffic can operate on the stabilized base until a hot mix asphalt base and wearing surface is applied. This

    paper evaluates the performance of a Foamed Asphalt project over a five year period

  • Format:
    PDF
  • Collection(s):
  • Main Document Checksum:
    urn:sha256:d78891e39fcd2874ee49d6b64e78155c1c52a4846fe711a2a0429f8770b9b81f
  • Download URL:
  • File Type:
    Filetype[PDF - 231.03 KB ]
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