Effects of Wet Mat Curing Time and Earlier Loading on Long-Term Durability of Bridge Decks: Executive Summary

Researchers conducted an extensive literature search, survey of Texas Department of Transportation (TxDOT) districts, and survey of other state Departments of Transportation (DOTs) to determine the state of the art for bridge deck curing, early loading, early age behavior, and durability prediction models. Several concrete mixtures commonly used in regional districts throughout the state of Texas were tested. Each concrete mixture was tested under field conditions within its respective climatic region. Field testing and testing of field collected samples provided information on concrete strength, concrete maturity and permeability. Supplementary laboratory experiments were performed to determine permeability using the salt ponding method, and the rapid chloride penetration test, RCPT. Researchers used the laboratory tests to correlate results with field collected samples and concrete strengths. Both field and laboratory test data were compared with existing models for predicting concrete maturity for various mix designs and curing methods. Core samples from field sites were examined using petrographic techniques to determine air void contents, calcium hydroxide formation, aggregate/paste interface features, cracks, unhydrated cement grains and other petrographic features. Researchers related the variations of petrographic features with wet mat curing duration. Finally, researchers investigated the fracture properties of several medium-strength concrete mixes cured for various durations in order to characterize the extent of cracking that might allow the ingress of chlorides from de-icing salts to the reinforcing bars. The purpose of this report is to present an overview of the research project and a summary of significant findings from the research.

  • Record URL:
  • Supplemental Notes:
    • Cover title: Effect of Wet-Mat Curing Time and Earlier Loading on Long-Term Durability of Bridge Decks: Executive Summary.
  • Corporate Authors:

    Texas Tech University, Lubbock

    College of Engineering, P.O. Box 43103
    Lubbock, TX  United States  79409

    Texas Department of Transportation

    Research and Technology Implementation Office
    125 E 11th Street
    Austin, TX  United States  78701-2483

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Senadheera, Sanjaya
    • Nash, Phillip T
  • Publication Date: 2008-4

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Technical Report
  • Features: Figures; Photos; References; Tables;
  • Pagination: 32p

Subject/Index Terms

Filing Info

  • Accession Number: 01696376
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX -0-2116-R6, 0-2116-6
  • Contract Numbers: 0-2116
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Feb 19 2019 10:45AM