Evaluation of corrosion resistance of various concrete reinforcing materials.

Details

• Creators:
  Tremblay, Jason P. ; Colgrove, George W.
• Corporate Creators:
  Vermont. Agency of Transportation. Materials and Research Section
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Reinforcing bars
  • Corrosion resistance
  • Concrete bridges
  • Sodium chloride
  • Life cycle analysis
  • Reinforced concrete
• Publication/ Report Number:
  2013-07
• Resource Type:
  Tech Report
• Geographical Coverage:
  Vermont
• Corporate Publisher:
  Vermont. Agency of Transportation. Materials and Research Section
• Abstract:
  The Vermont Agency of Transportation undertook a simple experiment to determine the corrosion ; resistance ability of various reinforcing steels (rebar) that may be used in bridges and other concrete ; structures. Eight types of rebar were used in the study, ; including: black, MMFX2, epoxy coated, Z ; - ; Bar, ; stainless clad, high nickel stainless steel, high manganese stainless steel, and a duplex stainless steel. ; Rebar samples were subjected to a 3% sodium chloride salt water solution bath three days a week for ; ei ; ght hours. When not submerged, samples were left to dry under standard temperature and ; pressures. Samples went through this procedure for a total of 260 cycles, which was equated to an ; approximately 10 year outdoor lifecycle under Vermont’s climatic cond ; itions. Samples were measured ; for mass, diameter, and coating thicknesses prior to, periodically during, and at the completion of their ; exposure testing. ; Results prove that each type of rebar show varying degrees of corrosion resistance to sodium ; chloride. ; Black bar showed not only extensive corrosion, but it also began rapidly from the onset of the ; immersions, while epoxy coated bars (ECR) showed adequate resistance to corrosion. Some ECR ; bars were intentionally cut and not repaired for the stud ; y showed a considerable increase in corrosion ; over intact bars. Bars that are designed to further combat construction damage, Z ; - ; Bar, stainless ; - ; clad, ; and solid stainless steels, exhibited far greater corrosion resistance
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28326/dot_28326_DS1.pdf
• File Type:
  [PDF - 1.49 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:cf5e86dd46640a778026204add30dc2324d7f11444b51b61f0315ae9b7adbed6