THERMAL EFFECTS AND INSULATION IN PAVEMENTS CONTAINING CEMENTITIOUS LAYERS

The theoretical effect of temperature on a pavement containing cement-treated layers was investigated with the aid of a finite difference computer program. In an uncracked cement-treated layer the thermal stresses and strains were shown to be significant and important. Also thermal insulation, by placing another pavement layer on top of the cement-treated layer, was shown to be both necessary and beneficial for the reduction of thermal strains. The analysis showed that the thickness of the insulating layer was more important than the thermal properties of the material. Once a cementitious layer had cracked, which is virtually inevitable in practice, movement could take place at the cracks which would eliminate a stress build-up and hence make the thermal stresses negligibile in comparison to traffic-associated stresses. Very little attention therefore needs to be paid to thermal stresses in cementitious layers once they have experienced their intitial cracking. /Author/

• Corporate Authors:

  National Institute for Transport & Rd Res S Af

  P.O. Box 395
  Pretoria 0001, Transvaal,   South Africa 
• Authors:
  • Otte, E
• Publication Date: 1976-3

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 31 p.

Subject/Index Terms

• TRT Terms: Cement; Computer programs; Electric insulating materials; Insulating materials; Pavement cracking; Pavement layers; Pavements; Strain (Mechanics); Thermal stresses
• Old TRIS Terms: Strains
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00165510
• Record Type: Publication
• Report/Paper Numbers: RP/1/76
• Files: TRIS, ATRI
• Created Date: Dec 27 1977 12:00AM