The purpose of the article is to describe a new method for the consideration of frost in one design of asphalt pavements. The originality of the method developed by the Administration Francaise des Ponts et Chaussees resides in the fact that the harmfullness of frost is to be characterized by a frost index transmitted to the soil, and not by a depth of frost. Finally, a numerical model which is more precise than other models currently in use is used, which makes it possible to treat the case of structure containing several courses. The initial parameters involved in the method are: the thermal characteristics of the winter, and the manner of synthesizing them through we choice of a standard frost index; the thermal characteristics of the asphaltic materials making up the pavement. This article indicates how they have been determined; the mechanical properties of the asphaltic materials, and the influence of temperature; the heaving of the soil by frost, and its bearing capacity at thaw. A numerical model, whose equations are elucidated, allows the calcuation of temperature ranges in the pavement, and forecasts the final position of the frost front, as well as the frost index transmitted to the foundation soil. The article presents some computation diagrams. The article gives some examples of the practical application of the method, and describes certification carried out in an experimental test station. /Author/

Media Info

  • Features: Figures; References;
  • Pagination: p. 819-830

Subject/Index Terms

Filing Info

  • Accession Number: 00170250
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Mar 29 1978 12:00AM