GUIDELINES FOR TIMING CONTRACTION JOINT SAWING AND EARLIEST LOADING FOR CONCRETE PAVEMENTS, VOLUME I: FINAL REPORT

A study with the objectives of providing guidelines for timing of contraction joint sawcutting to avert uncontrolled pavement cracking and providing guidelines for early loading of pavements by construction traffic has been conducted. A laboratory study of early age (4 to 24 hours) and early pavement loading (1 to 28 days) concrete strength properties for a range of highway concrete mixes was made. Sawcutting tests were made to determine earliest contraction joint sawcutting. Earliest sawcut timing was correlated on the basis of sawcut ratings to concrete strength properties and nondestructive test results that can be used for determining earliest sawcutting time. Concrete pavement placement and joint sawcutting were observed at three highway construction sites to verify test results. Latest sawcutting time was targeted on the basis of buildup of restraint stresses attributable to slab cooling. Guidelines for sawcut timing are presented to facilitate construction site decision making based on nondestructive test methods. Early loading by construction traffic was analyzed using ILLI-SLAB finite element models. Load tests were made at two pavement sites to verify that analytical model results are applicable to new pavements. Guidelines are presented to facilitate construction site decision making for early trafficking of new pavements based on nondestructive test methods.

  • Record URL:
  • Supplemental Notes:
    • See also Volume II - Appendices A through F (FHWA-RD-91-080).
  • Corporate Authors:

    Construction Technology Laboratories, Inc.

    5400 Old Orchard Road
    Skokie, IL  United States  60077-1030

    Federal Highway Administration

    Turner-Fairbank Highway Research Center, 6300 Georgetown Pike
    McLean, VA  United States  22101
  • Authors:
    • Okamoto, P A
    • Nussbaum, P J
    • Smith, K D
    • Darter, M I
    • Wilson, T P
    • Wu, C L
    • Tayabji, S D
  • Publication Date: 1994-2

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 292 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00647430
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-RD-91-079, NCP 2E2C1042
  • Contract Numbers: DTFH61-88-C-00062
  • Files: NTL, TRIS, ATRI, USDOT
  • Created Date: May 27 1994 12:00AM