Analysis and estimation of service life of corrosion prevention materials using diffusion, resistivity and accelerated curing for new bridge structures : volume 1 : corrosion prevention materials (monitoring and forensic examination).

Details

• Creators:
  Presuel-Moreno, Francisco J. ; Gutierrez, Francisco ; Zielske, James ; Casas, Valeria ; Wu, Yu-You
• Corporate Creators:
  Florida Atlantic University. Center for Marine Materials
• Subject/TRT Terms:
  • Service life
  • Bridge substructures
  • Corrosion resistant materials
  • Corrosion resistant alloys
  • Reinforced concrete
  • Portland cement concrete
  • Seawater
  • Concrete curing
  • Stainless steel
  • Alkali silica reactions
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• Publication/ Report Number:
  BDK-79-977-02
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation. Research Center
• Abstract:
  This investigation compiles the results describing the performance of: a) reinforced concrete specimens cast with ; 0.37 water to cementitious (w/cm) and binary blends of high performance concrete; the specimens have been ; exposed to seawater wet/dry weekly cycles for over 18 years; b) diffusivity and resistivity of concrete after 5 years ; at the Key Royale Bridge (from cores); c) high corrosion-resistant alloys (316, 304, 2304, and other alloys) cast in ; 0.5 water to cement ratio (w/c) concrete exposed outdoors to wet/dry cycles with 15% NaCl solution exposed for ; seven to ten years; d) accelerated transport method to investigate corrosion initiation and propagation of duplex ; stainless steel embedded in concrete (2101 and 2304); e) effect of mill scale on corrosion initiation of corrosionresistant ; alloys embedded in mortar and exposed to simulated pore solution with incremental chloride additions; f) ; follow-up of elongation (concrete prisms) due to alkali silica reaction (ASR) and the resistivity (cylinders) of ; concrete with 19% Fly Ash (FA), high alkalinity, seven different coarse aggregates, and, in some cases, Li ; additions; g) chloride threshold as a function of elevation of carbon-steel-reinforced mortar piles simulating ; partially immersed concrete substructures. A number of specimens were terminated for forensic analysis. ; Resistivity, diffusivity (obtained from chloride profiles), and LPR were some of the tests used to assess the ; performance of the above-described materials. In the case of the concrete prism of the ASR investigation, selected ; specimens were terminated for petrographic examination of lapped surfaces and thin sections. It was found that ; FL2 coarse aggregate and both coarse aggregate granites might be prone to ASR for situations in which the pH of ; the concrete is increased. Further evidence was found that concrete with 50% FA has low apparent diffusion ; coefficiennt, but the chloride threshold is lowered compared to only ordinary Portland cement (OPC) concrete (as a ; result of lower pH in the pore solution). This caused corrosion to initiate on more rebars on specimens with 50% ; FA than on specimens with OPC only. Stainless steel 316 and 304 rebars, when properly pickled in the as received ; condition, show no sign of corrosion. However, 316 and 304 rebars that were wire brushed before embedding them ; in concrete, initiated corrosion after several years of exposure. From tests on reinforced mortar specimens, duplex ; stainless steels investigated appear to have a chloride threshold similar to that of 304.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26985/dot_26985_DS1.pdf
• File Type:
  [PDF - 58.60 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:07b5d1bec729635c88a832350d47f6bed90e420c62150e9c8282f280b17b4b12