Flexural strength and fatigue of steel fiber reinforced concrete (2004 Hale Boggs deck).

Details

• Creators:
  Eggers, John ; Rupnow, Tyson D.
• Corporate Creators:
  Louisiana Transportation Research Center
• Corporate Contributors:
  Louisiana. Dept. of Transportation and Development ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Flexural strength
  • Bridge decks
  • Fiber reinforced concrete
  • Fiber-reinforced concrete--Louisiana--Testing
  • Fiber-reinforced concrete--Fatigue--Louisiana
  • Flexure
  • Concrete bridges--Floors--Testing
• Publication/ Report Number:
  FHWA/LA/08-438
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Edition:
  Final report; Sept. 1, 2004-Dec. 31, 2007
• Corporate Publisher:
  Louisiana Transportation Research Center
• Description:
  Through its history, a variety of wearing surface systems for the orthotropic steel deck of the Luling Bridge (aka Hale Boggs
  
  Bridge) have been built and studied. The main problem with these systems was they did not last the expected service life (20
  
  + years).
  
  In 1999, a short test section was installed using steel reinforced concrete, and even though the reinforcing steel was not
  
  optimally designed and exhibited cracks, it is still serviceable. Based on the performance of this test section installed in 1999,
  
  a new test section was installed in 2004. This new test section is a steel fiber reinforced concrete (SFRC) deck. The
  
  composition of the deck system is ½ in. of bridge deck steel, a thin (approximately ⅛ in.) layer of epoxy with impregnated
  
  aggregate and 3½ in. of SFRC.
  
  This study focused on the evaluation of the steel fiber reinforced concrete that was used in the new test section on the Luling
  
  Bridge. Test specimens of the same material that was to be used in construction of the wearing surface test section were
  
  produced. The specimens were then subjected to various test procedures, flexure strength and fatigue, flexural toughness, and
  
  chloride ion penetration among others.
  
  One unexpected consequence discovered upon initial testing was that the bending failure mechanism of the composite deck
  
  system was not in the SFRC, as projected, but in the epoxy layer. Furthermore, repeated load fatigue testing of the specimens
  
  was inconclusive, but did reinforce the failure mechanism shown in previous results. That being said, no inference to
  
  projected fatigue life can be made from the laboratory results to the field results.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/16785/dot_16785_DS1.pdf
• File Type:
  [PDF - 1.66 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:4c0ad8a2ade7a976de03b72091a552a9fab8e73b56acc0aa588ae2610501268c