PREVENTIVE MAINTENANCE AND REHABILITATION TECHNIQUES TO MITIGATE THE EFFECTS OF CORROSION-RELATED DETERIORATION IN CONTINUOUSLY REINFORCED CONCRETE PAVEMENT. FINAL REPORT

Continuously reinforced concrete pavements (CRCP) constructed prior to 1984 were built without an anti-corrosion coating on the steel rebars. A significant number of these pavements are deteriorating prematurely due to corrosion of the steel which causes delamination of the pavement surface above the steel. A research study was developed to test preventive maintenance and rehabilitation techniques for distressed CRCP. Several projects built in 1988 were included in the study. The methods of rehabilitation used were: intensive and thorough concrete "super patching", asphaltic concrete overlays of various thicknesses, Portland cement concrete thin overlay, use of impermeable membranes, reducing the existing CRCP to rubble (rubblize) and placing an asphaltic concrete overlay. The methods of preventive maintenance were cathodic protection of the rebar mat and the use of a corrosion inhibitor in the deicing salt. The monitoring data over four years indicates that the asphalt overlays were the most successful and are the recommended rehabilitation strategy. The following are not recommended: the use of impermeable membranes, "super patching", cathodic protection, corrosion inhibitor. Possible further research is recommended for the use of rubblized bases and thin bonded concrete overlays. It was not possible to determine the threshold time point at which a rehabilitation method should be used, but it is safe to say that rehabilitation should take place before there is significant surface distress.

Language

  • English

Media Info

  • Features: Figures; Tables;
  • Pagination: 35 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00664235
  • Record Type: Publication
  • Report/Paper Numbers: WI-02-94, Res Study #88-3
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Aug 1 1994 12:00AM