THE EFFECTIVENESS OF DEBONDING MATERIALS FOR DOWEL BARS

Pull-out tests have shown that the effectiveness of bond-breaking compounds applied to dowel bars in road and floor slabs decreases with increasing time between applying the compound and casting the concrete. One of the four materials tested retained its effectiveness far longer than the others. Both the results of pull-out tests and experience on site indicate that bond may also be prevented by covering the bar with a plastic sheath, a technique which has several advantages over the use of conventional bond-breaking paints. A plastic coating, however, was ineffective as a debonding agent. (Author/TRRL)

  • Corporate Authors:

    Cement and Concrete Association

    Wexham Spring
    Slough SL3 6PL, Buckinghamshire,   England 
  • Authors:
    • Mulajkar, V N
  • Publication Date: 1980-6

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 7 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00334836
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: Tech Rpt. 537 Monograph
  • Files: ITRD, TRIS
  • Created Date: Sep 16 1981 12:00AM