Evaluating the constructability of NUDECK precast concrete deck panels for Kearney Bypass Project.

Details

• Creators:
  Morcous, George ; Hatami, Afshin ; Assad, Micheal
• Corporate Creators:
  University of Nebraska--Lincoln
• Subject/TRT Terms:
  • Precast concrete
  • Bridge decks
  • Self compacting concrete
  • Girders
  • Panels
  • Posttensioning
  • Structural connection
  • Quality assurance
  • Quality control
  • Bridge construction
• Publication/ Report Number:
  SPR-P1 (13) M336
• Resource Type:
  Tech Report
• Geographical Coverage:
  Nebraska
• Corporate Publisher:
  Nebraska. Dept. of Roads
• Abstract:
  The first generation of precast concrete deck system, NUDECK, was implemented on the Skyline Bridge, ; Omaha, NE in 2004. The second generation of NUDECK system was developed to further simplify the ; system and improve its constructability and durability. The new generation consists of full-width full-depth ; precast concrete deck panels that are 12 ft long to minimize the number of deck panels and transverse joints, ; and consequently accelerate bridge construction. It also uses covered individual pockets and bundled shear ; connectors at 4 ft spacing to simplify panel and girder production and eliminate the need for deck overlay. ; Precast deck panels are pre-tensioned in transverse direction and post-tensioned in the longitudinal ; direction to enhance deck durability. Post-tensioning strands are placed underneath the deck panels (at the ; haunch area) to eliminate threading strands through ducts and grouting operations. ; The objective of this project is to investigate the constructability of the 2nd ; generation NUDECK system ; through full-scale testing of two key features: 1) using self-consolidating concrete (SCC) to fill the gap ; between precast concrete deck panels and bridge girders as well as covered deck pockets; and 2) using the ; proposed deviators and anchorage block in the end deck panels for post-tensioning the bridge deck. These ; investigations includes evaluating the pumpability/pouring of the developed SCC mixture in mockup and ; full-scale specimens. Sequence of pumping/pouring of SCC as well as its quality control and quality ; assurance procedures are also demonstrated. The investigations also include pullout testing of the deviators ; and pushoff testing of the anchorage block used for post-tensioning to evaluate their performance and refine ; their reinforcement details.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28638/dot_28638_DS1.pdf
• File Type:
  [PDF - 11.12 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:bad21395cb32689d75db7ed53a1a9e60e79be78aded836604c69e73b15b922f2