Diffusion vs. concentration of chloride ions in concrete : [summary].

Details

• Creators:
  Presuel-Moreno, Francisco
• Corporate Creators:
  Florida Atlantic University
• Subject/TRT Terms:
  • Reinforced concrete
  • Durability
  • Chlorides
  • Seawater
  • Bridge substructures
  • Concentration (Chemistry)
  • Ions
  • Thermal diffusion
  • Underwater structures
  • Cement
• Publication/ Report Number:
  BDK79-977-03
• Resource Type:
  Brief
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation
• Abstract:
  The Florida Department of Transportation ; (FDOT) maintains hundreds of bridges, and also ; builds new ones, in marine environments. These ; structures are built with reinforced steel, and ; over time, chloride ions from sea salt can migrate ; through concrete to attack reinforcing steel. ; FDOT has adopted ; concrete formulas ; and structure ; designs intended to ; delay this process ; and give marine ; bridges a 75-year ; service life. ; In this project, ; Florida Atlantic ; University ; researchers ; examined ; reinforced concrete ; specimens exposed for up to two years to various ; seawater and salt conditions. They simulated ; exposure of bridge components to continual ; immersion as if underwater, cyclic immersion as in ; the tidal zone, and lesser exposure of the splash ; zone. They also investigated the effects of salt ; spray on reinforced concrete not directly exposed ; to seawater and thus not saturated; in that case, ; high humidity or rain may provide the moisture ; that gives the ions mobility. Samples exposed for ; over 18 years were also part of this investigation.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27340/dot_27340_DS1.pdf
• File Type:
  [PDF - 1.59 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:bb7f13b491a9a3a9f7ba9a35d0b23a3d8df308a6b59dd2c88e8e9867fa566daf