EXPERIMENTAL INSULATION OF A SUBGRADE EVALUATION OF DATA, FOURTH THROUGH THE SEVENTH YEARS

The project was primarily designed to evaluate the effectiveness of insulation for the prevention or reduction of the freezing of subgrade soil and consequently to eliminate or minimize differential frost heaves. Insulation employed on this project was Styrofoam, a product of Dow Chemical Company. To evaluate the performance of the Styrofoam, certain measurements were made, these being as follows: Temperature (frost penetration), the vertical movement of the pavement, deflection of pavement, and the water content of the soils. In addition to these measurements, pavement evaluations were made of the test sections, for it was believed that in the final analysis, how well the pavement has performed would be one of the more important factors in determining the degree of success of the Styrofoam as a material for highway construction. One of the most important benefits of the Styrofoam is that the vertical movement (frost heave) has been minimized. This appears to be especially true during the breakup period when pavements are subjected to some of their greatest stresses due to vertical movement. The freezing index for the five-year period, at the Hampden Experimental insulation project, ranged from a low of 1180 in the year 1971 to a high of 1780 in the year 1969.

  • Corporate Authors:

    Maine Department of Transportation

    Materials and Research Division, Box 1208, Hogan Road
    Bangor, ME  United States  04402
  • Authors:
    • Bigelow Jr, N
    • Jacobs, JHG
  • Publication Date: 1974-7

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 65 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00261650
  • Record Type: Publication
  • Report/Paper Numbers: Tech Paper 74-11
  • Files: TRIS, STATEDOT
  • Created Date: Oct 22 1974 12:00AM