INFLUENCE OF SULFATE IONS ON CHLORIDE-INDUCED REINFORCEMENT CORROSION IN PORTLAND AND BLENDED CEMENT CONCRETES

Reinforced concrete structures serving in marine environments and in soils contaminated with high concentrations of chloride and sulfate salts are susceptible to reinforcement corrosion and sulfate attack. This study examines the effect of chloride and sulfate ions, or both, on reinforcement corrosion in plain and blended cement concretes. Corrosion potentials and corrosion current density were measured at periodic intervals to determine reinforcement corrosion. The mechanisms of chloride-induced reinforcement corrosion in the presence of sulfate ions was elucidated by extracting and analyzing the pore solution. The time to initiation of reinforcement corrosion was strongly related to the mobility and diffusivity of the chloride ions. The corrosion rate of steel increased in both plain and blended cements once the chloride and sulfate ions reached the steel-concrete interface. Silica-fume cement concrete was the slowest to initiation of corrosion and had a low current corrosion density as well.

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  • Corporate Authors:

    American Society for Testing and Materials (ASTM)

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Al-Amoudi, OSB
    • Rasheeduzzafar
    • Maslehuddin, M
    • Abduljauwad, S N
  • Publication Date: 1994-6

Language

  • English

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Filing Info

  • Accession Number: 00664757
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 25 1994 12:00AM