The main objective of this study was to establish the factors that influence the durability of the surface configurations that are used or can be used to provide high and long lasting skid resistance for portland cement concrete pavements. In the development of such durable surface texture an insight into pavement wear mechanism in the presence of grooves is necessary. The wear of pavements may involve polishing and small scale degradation at the top surface as well as a possible large scale material loss in concrete. The wear phenomena occurring at the top surface was investigated experimentally by petrographic examination of thin sections prepared from the cores taken from actual highways undergoing various degrees of wear. The samples included saw cut grooves imparted to the worn concrete surface, and also textures imparted to the fresh concrete pavements by burlap drag and metal tines. The structural behavior of the area below the top surface and around the grooves was investigated theoretically. It was found that the critical locations where stresses could develop to cause failure were at the bottom or at the corner of the grooves. The microscopic study of the thin sections showed that wear was mainly a surface phenomena. Most of the cracks were found at the top surface and virtually no cracks were seen at the bottom of the grooves. Variation in the strength of the pastes affected the wear. The loss of material at the surface in strong pastes resulted from flaking, and in weaker pastes it was because of crushing. Both pastes yielded good microtexture, but the weaker mixtures wore faster.

Media Info

  • Pagination: 62 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00263673
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: #0970 Final Rpt.
  • Files: NTL, TRIS, USDOT
  • Created Date: Dec 19 1974 12:00AM