Protection of reinforced concrete structures in chloride-sulfate exposures

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5 Scopus citations

Abstract

Marine, coastal and offshore environments or soils charged with concentrated brines are characterized by high concentrations of chlorides and sulfates. The influence of sulfate ions on chloride-induced corrosion of reinforcing steel in concrete has not been well documented in the literature. An exemplary situation, where these salts exist concomitantly, is the sabkha soil which prevails in many parts of the world. The severity of sabkha environment has resulted in a lot of resources being spent on repair and rehabilitation of the deteriorated concrete infrastructures. This paper summarizes the results of a comprehensive investigation to evaluate the corrosion performance of reinforced concrete prepared with plain cements (Type I and Type V) and blended cements (made with fly ash, silica fume and blast furnace slag) exposed to sulfate-chloride environments as well as to a "genuine" eastern Saudi sabkha. Several corrosion-related tests were conducted including corrosion potential, corrosion current density and chemical analyses. Based on the results of this investigation, specifications for durable concrete to serve in the aggressive sabkha media are presented and compared with the international codes of practice.

Original languageEnglish
Pages (from-to)72791-727916
Number of pages655126
JournalNACE - International Corrosion Conference Series
StatePublished - 2007

Keywords

  • Aggressive environments
  • Blended cements
  • Chlorides
  • Concrete protection
  • Corrosion
  • Plain cements
  • Reinforcing steel
  • Sabkha
  • Specifications
  • Sulfate attack

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science

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