Effects of Concrete Moisture on Polymer Overlay Bond over New Concrete : [Technical Summary]

Details

• Creators:
  Shearrer, Andrew Joseph ; Riding, Kyle A ; Peterman, Robert J.
• Corporate Creators:
  Kansas State University. Transportation Center
• Subject/TRT Terms:
  • Bridge decks
  • Concrete overlays
  • Polymers
  • Moisture content
  • Bond strength (Materials)
  • Test procedures
  • Concrete curing
  • Delamination
  • Fly ash
• Publication/ Report Number:
  K-TRAN: KSU-13-3
• Resource Type:
  Brief
• Geographical Coverage:
  Kansas
• Corporate Publisher:
  Kansas. Dept. of Transportation. Bureau of Materials & Research
• Abstract:
  Epoxy polymer overlays have been used for decades on existing bridge decks to protect the deck and extend its service life. The polymer overlay’s ability to seal a bridge deck is now being specified for new construction. Questions exist about the amount of drying time needed to achieve an acceptable concrete moisture content to ensure an adequate bond to the polymer overlay. The 2007 Kansas Department of Transportation (KDOT) specifications for new bridge decks call for a 14-day wet curing period followed by 21 days of drying. If not enough drying is provided, the moisture within the concrete can form water vapor pressure at the overlay interface and induce delamination. If too much drying time is provided, projects are delayed, which can increase the total project cost or even delay overlay placement until the next spring.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28924/dot_28924_DS1.pdf
• File Type:
  [PDF - 697.20 KB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha-512:b7c4583d3c9d36fa4c0b2291884b2aa6ede58489e2f9b9040852f4b9bf27cd6fecde5575cb7223635ae463d383d9b200c268bf8162f653b698bdb11fda96badf