Volume 12, Issue 1 (July 1990)

    Corrosion of Reinforcing Steel in Concrete Containing Slag or Pozzolans

    CODEN: CCAOAD

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    Abstract

    Use of fly ash, silica fume, natural pozzolans, and blast-furnace slag in concrete is becoming increasingly common. Incorporation of these materials improves the durability of concrete. But as yet there are few quantitative data available on the effect of these materials on long-term corrosion of steel reinforcement. Such data will help the concrete technologists to select the proper type of materials to produce dense and impermeable concrete to withstand aggressive service environments.

    In this investigation, the long-term corrosion-resisting characteristics of concretes made with two fly ashes, a natural pozzolan, a blast-furnace slag cement, and a preblended portland-fly ash cement were evaluated. Specimens were immersed in 5% sodium chloride solution for a period of more than five years, and the corrosion activity was evaluated by monitoring the half-cell potentials and measuring the corrosion rate of embedded steel using linear polarization resistance technique. Results indicate that addition of pozzolans or slag increases the corrosion-resisting characteristics of concrete. The corrosion rate of steel in concrete made with blast-furnace slag cement is lower than in other concretes.


    Author Information:

    Al-Mana, AI
    Associate professor, Civil Engineering, and manager, Metrology, Standards, and Materials Division, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran,

    Saricimen, H
    Research engineer, Metrology, Standards, and Materials Division, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran,

    Maslehuddin, M
    Senior engineer, Metrology, Standards, and Materials Division, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran,

    Shamim, M
    Engineer, Metrology, Standards, and Materials Division, Research Institute, King Fahd University of Petroleum and Minerals, Dhahran,


    Stock #: CCA10385J

    ISSN: 0149-6123

    DOI: 10.1520/CCA10385J

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    Author
    Title Corrosion of Reinforcing Steel in Concrete Containing Slag or Pozzolans
    Symposium , 0000-00-00
    Committee C09