Evaluation of bridge deck sealers.

Details

• Creators:
  Liang, Yu-chang ; Gallaher, Benjamin ; Xi, Yunping
• Corporate Creators:
  University of Colorado at Denver. Dept. of Civil Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Bridge decks
  • Sealing compounds
  • Field tests
  • Concrete bridges
  • Epoxides
  • Silane
  • Methyl methacrylate
  • Evaluation and assessment
  • Pressure resistance
• Publication/ Report Number:
  CDOT-2014-6
• Resource Type:
  Tech Report
• Geographical Coverage:
  Colorado
• Corporate Publisher:
  Colorado. Dept. of Transportation. Applied Research and Innovation Branch
• Abstract:
  This study focuses on the evaluation of bridge deck sealers commonly used on highway bridge decks and ; their relative performance. After reviewing the most up-to-date research findings on chemical sealers used ; by state DOTs, four sealer products that could potentially be used by the Colorado Department of ; Transportation (CDOT) were selected for evaluation. High molecular weight methacrylate (HMWM), two ; epoxies, and a silane were assessed for their skid resistance and ability to block or slow down moisture and ; chloride ion penetration into concrete bridge decks. Bridge structure E-17-QM (westbound US 36 to I-270 ; over I-25) was selected for the field study. The four sealers were installed on the deck surface of Bridge E- ; 17-QM by professional contractors on 06/02/2010. Skid resistance, temperature variation, moisture ; fluctuation, and chloride concentration profiles in concrete were selected as the four experimental ; parameters for evaluating the performance of the four sealers. Eighteen integrated sensors were installed ; in the bridge decks in the five testing sections and at different depths for monitoring the internal ; temperature and relative humidity distributions in concrete. Concrete cores were taken at four periods ; during the project to test for chloride concentration profiles. The British Pendulum Tester (BPT) was used ; to measure the skid resistance of the concrete surface with and without sealers. From the analysis and ; comparisons of the test data, the performances of the four sealers were ranked in terms of the four ; experimental parameters. ; Implementation ; Without further long-term data, the use of sealers is recommended as a viable short-term protection ; system. If CDOT chooses to use a long-term bridge deck sealing system, HMWM is recommended over ; the other sealers. Eligible bridge decks should be selected based on the assessment of percent deck ; deterioration, estimated time to corrosion, deck surface condition, and concrete quality.
  More +
• Format:
  PDF
• Funding:
  80.11
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27455/dot_27455_DS1.pdf
• File Type:
  [PDF - 955.82 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:f668f5402d05b09b95c58247c7140179ccd45131b976e62e2204674cb5f61531