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SUBBASE FRICTION EFFECTS ON CONCRETE PAVEMENTS. PROCEEDINGS, 4TH INTERNATIONAL CONFERENCE ON CONCRETE PAVEMENT DESIGN AND REHABILITATION, PURDUE UNIVERSITY, APRIL 18-20, 1989

This paper presents findings of a study researching the frictional effects of stabilized and unstabilized subbases. The paper first discusses the concepts of subbase friction, including defining that it consists of three components - an adhesion, or gluing, component between the concrete pavement and the subbase; a bearing component that is influenced by the surface texture of the subbase; and a shearing component which is induced by the movement of the slab across the subbase. The paper then covers the results of a literature search on the topic of subbase friction, which found, among other facts, that the frictional effects of stabilized subbases have not been adequately pursued until this study, and that, according to one report, the frictional effects of cement stabilized subbases are very large, on the order of 28 psi and higher. Then, experiments on several subbases, in the form of push off tests, are discussed, followed by a presentation of the results and implications from the experiments. The paper concludes with a discussion of how subbase friction could affect design of concrete pavements.

  • Corporate Authors:

    Purdue University

    School of Civil Engineering, 550 Stadium Mall Drive
    West Lafeyette, IN  United States  47907

    Federal Highway Administration

    Turner-Fairbank Highway Research Center, 6300 Georgetown Pike
    McLean, VA  United States  22101
  • Authors:
    • Wimsatt, A J
    • McCullough, B F
  • Publication Date: 1989-4

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00486324
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-89-208, 3C1B1144
  • Contract Numbers: DTFH61-87-C-00140
  • Files: TRIS, USDOT
  • Created Date: Aug 31 1989 12:00AM