The purpose of this study was to evaluate the construction techniques and performance characteristics of the La. DOTD's first portland cement concrete resurfacing project, which was constructed over a short section of an existing 9-inch doweled concrete pavement with 20-foot joint spacing located on U.S. 61 north of Baton Rouge. The old pavement surface was cleaned with a device which blasted the surface with small steel shot. The resurfacing concrete consisted of a 5.8-bag, air-entrained limestone concrete with a minimum thickness of 3 inches. The average thickness of the overlay was 4 inches due to a change in cross-slope from 1.5 to 2.0 percent. A water cement grout was used as a bonding agent and was sprayed on the old pavement immediately prior to overlay. The new overlay increased the serviceability index of the pavement from 2.3 to 4.0 and increased the skid resistance from 36 to 62. Approximately 16 percent of the exterior slab corners have experienced varying degrees of disbondment, resulting in a minor degree of cracking. Deflection measurements indicate that the overlay has maintained much of its initial gain in structural capacity. Recommendations are made relative to construction of future thin-bonded PCC overlays. (Author)

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 63 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00454485
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-LA-85-181
  • Contract Numbers: LA-80-3P(B)
  • Created Date: Jul 31 1986 12:00AM