A LABORATORY STUDY OF THE FATIGUE OF BONDED PCC OVERLAYS. INTERIM REPORT

Bonded concrete overlays are a new method of pavement rehabilitation and the effect of long-term repeated loadings is not yet known. A laboratory study, using accelerated repeated loadings, was performed to enable a prediction of long-term results in a relatively short time period. In the laboratory, four model pavement slabs, designed to simulate conditions on Loop 610 in Houston, Texas, were tested. Each slab consisted of a base slab and a bonded PCC overlay. Each base slab was cracked transversely at the midspan and then loaded in fatigue to a distress condition before the overlay was placed. The overlay was cracked and fatigue loaded in the same manner. Both continuously reinforced and jointed pavements were studied. The data taken from the laboratory were analyzed and a study on remaining life was done. Results from the study showed differences in the behavior of CRCP and JCP slabs. JCP slabs had larger deflections and shorter fatigue lives. CRCP slabs failed by cracking with no other signs of distress while JCP slabs failed by punchout; following loss of shear strength and delamination. In general, for both the CRCP and JCP slabs, placement of a BCO decreased deflections, increased load transfer, and increased the fatigue life of the pavement structure.

• Record URL:
  • https://library.ctr.utexas.edu/digitized/texasarchive/phase2/457-2.pdf
• Supplemental Notes:
  • Research study title: Thin-Bonded Overlay Implementation.
• Corporate Authors:

  University of Texas, Austin

  Center for Transportation Research, 3208 Red River Street
  Austin, TX  United States  78705

  Texas State Department of Highways & Public Transportation

  Transportation Planning Division, P.O. Box 5051
  Austin, TX  United States  78763

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Reilley, K T
  • Saraf, C
  • McCullough, B F
  • Fowler, D W
• Publication Date: 1986-9

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 156 p.

Subject/Index Terms

• TRT Terms: Accelerated tests; Concrete pavements; Continuously reinforced concrete pavements; Deflection; Delamination; Driver rehabilitation; Forecasting; Laboratory studies; Mechanical fatigue; Pavement cracking; Pavements; Repeated loads; Shear strength; Time duration
• Uncontrolled Terms: Bonded concrete overlays; Fatigue life; Long term; Rehabilitation
• Old TRIS Terms: Pavement deflection
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00474695
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-87/29+457-2, Res Rept 457-2, CTR 3-8-86-457-2
• Contract Numbers: Res Study 3-8-86-457
• Files: TRIS, USDOT, STATEDOT
• Created Date: Oct 31 1987 12:00AM