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:
  Bridge Construction Bridge Decks Girders Panels Posttensioning Precast Concrete Quality Assurance Quality Control Self Compacting Concrete Structural Connection
• 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:bad21395cb32689d75db7ed53a1a9e60e79be78aded836604c69e73b15b922f2
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28638/dot_28638_DS1.pdf
• File Type:
  [PDF - 11.12 MB ]