Self-consolidating concrete repairs on Interstate 25 bridge abutments north of Mead.

Details

• Creators:
  Kiousis, Panos D. ; Whitcomb, Brent L.
• Corporate Creators:
  Colorado School of Mines
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Interstate highways
  • Highway bridges
  • Self compacting concrete
  • Highway maintenance
  • Bridge abutments
  • Bridge decks
  • Girders
  • Reinforcing steel
  • Rehabilitation (Maintenance)
• Publication/ Report Number:
  CDOT-2013-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  Colorado
• Corporate Publisher:
  Colorado. Dept. of Transportation. Research Branch
• NTL Classification:
  NTL-HIGHWAY/ROAD TRANSPORTATION-Bridges and Structures ; NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance
• Abstract:
  In August of 2011 CDOT performed maintenance on Interstate 25 bridges D-17-DA and DB on I-25 north of Mead, CO. ; The maintenance was performed using self-consolidating concrete (SCC), and the methods were based on a study performed ; by the Colorado School of Mines under contract number 09 HTD 00027, and published in a CDOT 2007 report titled “Study ; on the Use of Self-Consolidating Concrete for the Repair of the Mead Bridges on I-25.” ; The concrete abutments at the Mead Bridges on I-25 deteriorated in recent years due to unexpected freeway embankment ; movements. In many places the concrete had spalled off and exposed the steel reinforcement. The north abutments were ; especially affected by the embankment progressive movement towards the bridge. This movement forced the abutment ; against the steel girders, and progressed to the point where the abutment cover was crushed and the girders came in direct ; contact with the abutment reinforcement. It also resulted in buckling of the concrete deck, which was lifted off of the ; girders, resulting in a gap between the deck and the girders. ; To mitigate the problems described above, CDOT decided to “lock” the girders to the abutments with the use of SCC. The ; intent to use SCC was based on the need to have a flowable, yet stable concrete that could encapsulate the ends of the steel ; girders and the space in between them, without leaving voids at the interface of the new concrete and the existing deck slab, ; and without the need to vibrate the new concrete during placement. To achieve these goals, a high flowability concrete was ; designed with the intent of placing it through a number of holes at the deck within the encased area. ; One year after completion of the repair, inspections of the abutments were made in order to verify the performance of the ; repair after a full cycle of seasonal temperature changes. The inspection found that the concrete placed around the girders is ; performing as intended. No significant cracking or other indications of concrete failure were seen.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26096/dot_26096_DS1.pdf
• File Type:
  [PDF - 636.36 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:cec870678f954a58e2f9129db21ffa01d50a988b869cef52a6b5a224b9ed6ccf7d77099b2e59c05fcbabc014407bc90699ac565575690c9152a1e146812b3392