Construction of crack-free bridge decks.

Details

• Creators:
  Darwin, David ; Khajehdehi, Rouzbeh ; Alhmood, Abdallah ; Feng, Muzai ; Lafikes, James ; Ibrahim, Eman ; O'Reilly, Matthew
• Corporate Creators:
  University of Kansas. Dept. of Civil, Environmental and Architectural Engineering
• Corporate Contributors:
  Kansas. Dept. of Transportation. Bureau of Research
• Subject/TRT Terms:
  • Concrete bridges
  • Bridge decks
  • High performance concrete
  • Cracking
  • Cracking of concrete pavements
  • Pavement cracking
  • Bridge construction
  • Bridge Decks
  • Cracking
  • High-Performance Concrete
• Publication/ Report Number:
  FHWA-KS-17-01
• Resource Type:
  Tech Report
• Geographical Coverage:
  Kansas ; United States
• Corporate Publisher:
  University of Kansas. Dept. of Civil, Environmental and Architectural Engineering
• Abstract:
  This serves as the final report on Transportation Pooled-Fund Program Project No. TPF-5(174), “Construction ; of Crack-Free Bridge Decks.” The goal of the study was to implement the most cost-effective techniques for ; improving bridge deck life through the reduction of cracking. Work was performed both in the laboratory and in the ; field, resulting in the construction of 17 bridge decks in Kansas that were let under Low-Cracking High-Performance ; Concrete (LC-HPC) specifications. The report documents the performance of the decks based on crack surveys ; performed on the LC-HPC decks and matching control bridge decks. The specifications for LC-HPC bridge decks, ; which cover aggregates, concrete, and construction procedures, as well as procedures for performing crack surveys, are ; summarized. The first 13 LC-HPC bridge decks are compared to control decks in terms of crack density as a function ; of time. Survey results are also presented for three LC-HPC decks without control decks and one deck let under LCHPC ; specifications on which the specifications were not enforced. The widths of measured cracks ranged from 0.006 ; to 0.025 inches (0.15 to 0.64 mm). The LC-HPC bridge decks exhibit less cracking than the matching control decks in ; the vast majority of cases. Only bridge decks LC-HPC-2 and LC-HPC-3 have higher overall crack densities than their ; control decks, the two best performing control decks in the program, and the differences are small. The majority of the ; cracks are transverse and run parallel to the top layer of the deck reinforcement. Relatively short cracks are present ; near the abutments and propagate perpendicular to the abutments (longitudinally). The study demonstrates the positive ; effects of reduced cementitious material and cement paste contents, improved early-age and long-term curing, concrete ; temperature control, limitations on or de-emphasis of maximum concrete compressive strength, limitations on ; maximum slump, and minimizing finishing operations on minimizing cracking in bridge decks.
  More +
• Format:
  PDF
• Funding:
  Transportation Pooled Fund Study - TPF-5(174)
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32227/dot_32227_DS1.pdf
• File Type:
  [PDF - 5.00 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:aae2c293dfdd748b99b51201ed3e4807e59f0ba0990d2a11eb522b0c106cae3c