Strategic Evaluation of Different Topical Protection Systems for Bridge Decks and the Associated Life-Cycle Cost Analysis

Details

• Creators:
  Liang, Yu-Chang ; Zhang, Weiping ; Xi, Yunping
• Corporate Creators:
  University of Colorado at Denver. Department of Civil Engineering
• Corporate Contributors:
  Colorado Department of Transportation. Office of Applied Research ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Asphalt Additives Bridge Decks Bridge Performance Chloride Concentration Chloride Content Concrete Bridges Corrosion Corrosion Prediction Models Deterioration Evaluation Highway Bridges LCCA, Rebar Corrosion Life Cycle Analysis Mathematical Prediction Protection Reinforcing Bars Traffic Loads

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• Publication/ Report Number:
  CDOT-2010-6
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Colorado
• Edition:
  Final Report: Sept. 1, 2005 to May 31, 2010
• Corporate Publisher:
  Colorado Department of Transportation. Applied Research & Innovations Branch
• Abstract:
  Bridge decks deteriorate faster and require more maintenance and repair than any other structural components on highway bridges. Topical protection systems act as barriers to protect bridge decks from corrosion damage by preventing water, oxygen, and chloride ions from reaching the reinforcement. This study evaluated topical protection systems commonly used on highway bridge decks in Colorado, including low-permeability concrete overlays and waterproof membranes with asphalt overlays. Five bridges were selected for inspection in the project. Concrete cores were taken from the selected bridge decks, and chloride concentration profiles were obtained at various depths. Chloride concentration is an important indicator for the corrosion damage of rebars in concrete deck. The inspection results showed that all five bridge decks are currently in good shape, which means the protection systems used on the selected bridges are effective. In order to predict future performance of the protection systems, a model was developed to predict the corrosion initiation time for rebars based on the current inspection results. The main feature of the prediction model is that the effect of deterioration of the concrete on its chloride permeability can be taken into account by using the current and future inspection results, and the deterioration could be due to environmental and/or traffic loadings.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:589551a30918965858277253863019bf2f6a55db6c3c43d8c887896485f6d6943e43bda66725288ea6ded5364bbf92f3acdcfa9691214d73741c2e65d855f7c0
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/92811/dot_92811_DS1.pdf
• File Type:
  [PDF - 2.07 MB ]