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Using Foamed Asphalt as a Stabilizing Agent in Full Depth Reclamation of Route 8 in Belgrade [February 2002]

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. Most 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 (MDOT) 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 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, MDOT has been experimenting with adding a number ; of stabilizing agents to virgin or recycled base materials to increase stability. Some of the stabilizing ; agents 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 graded and compacted. Traffic can ; operate on the stabilized base until a hot mix asphalt base and wearing surface is applied. ; This paper will describe the steps involved to design a foamed asphalt mix, preparation of the roadway, ; and evaluation of the experimental application
  • Format:
    PDF
  • Download URL:
    https://rosap.ntl.bts.gov/view/dot/28452/dot_28452_DS1.pdf
  • File Type:
    Filetype[PDF - 896.41 KB]
  • Collection(s):
    US Transportation Collection
  • Main Document Checksum:
    urn:sha256:aea64fc8351d2150f8df9815e0fec7563b316da081f71740a5b9e9b8ef5c3ad4
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