This report describes the experimental use of All-Weather Crete HI-45 expanded perlite-asphalt hot mix insulating sub-base to control frost penetration of the subgrade in a gull scale highway construction project over a period of five years. Conclusions and recommendations concerning use maintenance are presented. The first half of the study, covering two years of monitoring field data, was published in an interim report in October 1973. Field data for the second half covering the last three years of the study, is included in this report. The final results of the study indicated that four inches of AWC (24 pcf density) subbase under a 10-inch PCC pavement, was effective in preventing penetration of freezing subsurface temperatures and frost action in the subgrade in northern Illinois. Other thicknesses and compaction densities of AWC tried in this study were ineffective when the freezing index in the area was over 600 degree-days.

  • Supplemental Notes:
    • Sponsored by DOT and FHWA.
  • Corporate Authors:

    Illinois Department of Transportation

    Bureau of Materials and Physical Research
    126 East Ash Street
    Springfield, IL  United States  62704-4766
  • Authors:
    • Mascunana, I
  • Publication Date: 1976-3

Media Info

  • Pagination: 33 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00141039
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: ILL-PR-64 Final Rpt.
  • Contract Numbers: IHD-8
  • Created Date: Oct 6 1976 12:00AM