BEHAVIOR OF CONTRACTION JOINTS IN THE REHABILITATED AASHO TEST ROAD

Rehabilitating the AASHO Test Road pavement gave an opportunity to examine the bahavior of sawed dowelled contraction joints spaced at 14 ft (4.57 m) in non-reinforced pavement overlying a granular subbase with those sawed at 40 ft (12.19 m) and at 100 ft (30.48 m) in reinforced pavements on both granular and stabilized subbases. Behavior for this study represents a change in spalling, faulting, joint opening, D-cracking, transverse cracking and pavement smoothness. Faulting decreased as joint interval decreased and as pavement thickness increased. Faulting was reduced where the subbase was stabilized. The cumulative amount of faulting per pavement mile was largest for 15-ft panels even though they had the least fault per joint. This fact partly accounts for pavements with 40-ft joints being smoother than those with 15-ft joints. The amount of spalling per mile of pavement increased as the joint interval decreased, although the number of major spalls per joint tended to increase as joint interval and joint opening increased. Transverse cracking between the joints increased as joint interval increased, but it was reduced over a stabilized subbase. The amount of D-cracking per mile of pavement increased as the number of joints and cracks increased and as the pavement aged. The best overall pavement behavior and the lowest Roughness Index were associated with pavements that had the fewest joints, particularly on a BAM subbase. /FHWA/

  • Supplemental Notes:
    • Conducted in cooperation with DOT, Federal Highway Administration.
  • Corporate Authors:

    Illinois Department of Transportation

    Bureau of Materials and Physical Research
    126 East Ash Street
    Springfield, IL  USA  62704-4766
  • Authors:
    • McKenzie, L J
    • Little, R J
    • Dierstein, P G
  • Publication Date: 1977-3

Media Info

  • Pagination: 79 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00179850
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-IL-PR-75 Intrm Rpt.
  • Contract Numbers: IHR-28-Phase 1
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Oct 12 1978 12:00AM