Consideration of Differential Icing Conditions in the Design of Pavement Systems Overlying Geofoam Lightweight Fills

An explicit pavement design procedure to minimize differential icing conditions of pavements underlain by non-earth materials, such as geofoam lightweight fills, is currently not available. Therefore, to initiate the design development process, a differential icing study was performed to evaluate the effect of pavement material type and thickness, geofoam type and thickness, and concrete separation layer thickness on pavement surface temperatures and to provide pavement system design recommendations for minimizing the potential for differential icing conditions. This study demonstrates the use of the Enhanced Integrated Climatic Model (EICM) as an analysis tool to design pavement systems against the potential for differential icing conditions. The pavement surface temperatures between the proposed pavement system over geofoam lightweight fill and the adjacent pavement system over natural soil obtained from the EICM can be compared and the proposed pavement system over geofoam can be modified during design until similar temperatures are obtained at the surface of both pavement systems. Differential icing must be considered in the design of pavement systems placed over geofoam regardless of the thickness of geofoam placed in the embankment. A thicker pavement surface and/or granular base will minimize the potential for differential icing but the effect diminishes with increasing thickness. The use of a concrete separation layer decreases the potential for differential icing, but the effect also decreases with increasing concrete thickness.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 19p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01046323
  • Record Type: Publication
  • Report/Paper Numbers: 07-1103
  • Files: PRP, TRIS, TRB
  • Created Date: Feb 8 2007 5:43PM