EVALUATION OF THE EFFECTIVENESS OF FABRIC REINFORCEMENT IN EXTENDING THE IN-SERVICE LIFE OF BITUMINOUS CONCRETE OVERLAYS

Included in this Final Report is the description of tests of fabric and non-fabric treated overlays of a jointed unreinforced portland cement concrete pavement on US 70 in Orange County, North Carolina. Treatments of the overlays were for the purpose of determining their effectiveness in preventing or reducing reflection of joints and cracks in the original pavement through the 2 inch bituminous concrete overlay in an attempt to extend the service life of the overlay. Four continuous fabric and four strip fabric treatments were used in addition to four non-fabric treatments, one of which was the regular two inch I-2 overlay used for control. The fabrics were three woven or non-woven polymeric materials and one of woven fiberglass. The four non-fabric treatments consisted of a surface treatment type mat course, a plant mixed mat coat, an opengraded mix course laid directly on the old pavement and covered with the I-2 mix, and the I-2 mix used for control. The test site was divided into six blocks with each of the twelve treatments repeated in each block. Total site is 3.5 miles long with each individual treatment 510 feet long. Development of reflective cracking has been monitored on a regular basis for approximately four years with the latest crack survey having been completed in July 1978. Analysis of the observations to date are made in this report with emphasis on the July 1978 data. It has been found to date up to 40 percent cracks reflected in some treatments that there is no difference between the fabric treatments as a group and the non-fabric treatments as a group. There are no differences between the apparent best fabric treatment and the apparent best non-fabric treatment, when compared to each other. Monitoring of the test treatment has been discontinued with the July 1978 inspection. /FHWA/.

  • Corporate Authors:

    North Carolina State University, Raleigh

    Highway Research Program, P.O. Box 5993
    Raleigh, NC  United States  27607

    North Carolina Department of Transportation

    P.O. Box 25201, 1 South Wilmington Street
    Raleigh, NC  United States  27611
  • Authors:
    • Mullen, W G
    • Hader, R J
  • Publication Date: 1979-1

Media Info

  • Pagination: 80 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00302049
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-NC-79-001, FCP 45D2-044
  • Files: TRIS, STATEDOT
  • Created Date: Nov 27 1979 12:00AM