FIBROUS CONCRETE OVERLAY IN MINNESOTA

The construction is reported of five 500-foot test sections of glass fiber and steel fiber portland cement concrete (PCC) overlays and a 1300 foot section of plain portland cement concrete overlay which were included as part of a contract for bituminous overlay. The surface overlayed was PCC which was fairly worn and had moderate transverse cracking. One inch long and flat steel and glass fibers were used. Details are given of the concrete mix per cubic yard. The concrete surface was sandblasted, then swept with a power broom, the epoxy bonding agent was sprayed on the surface, followed by the slipform paver, followed by transverse hand floating and brooming and then membrane curing compound. The steel reinforcing bars placed over the transverse cracks in the underlying pavement were held in position by small piles of concrete. Details are given of the overlay procedures. Problems associated with the glass fiber concrete and the balling of steel fibers are discussed. Inspections will be made to evaluate the performance of the overlays.

Media Info

  • Features: Photos;
  • Pagination: p. 79-89
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00149797
  • Record Type: Publication
  • Files: TRIS, USDOT
  • Created Date: Apr 13 1977 12:00AM