Chloride Permeability and Corrosion Risk of High-Volume Fly Ash Concrete with Mid-Range Water Reducer

This study investigated the effect of local high-volume fly ash (HVFA) incorporating a mid-range water reducer on the compressive strength of concrete and on chloride penetration and steel corrosion under tropical climate conditions (Thailand). The usual amount of fly ash used for partial cement replacement in concrete is 15%, however there is a trend toward increasing this percentage to 30 to 50%. In this study, the results of electrically accelerated corrosion tests were compared with normal tests. The results demonstrated the effectiveness of the corrosion reduction with the use of the water reducer, independent of compressive strengths. A mid-range water reducer improved the 28-day strength by 50 to 75%, compared with 8 to 36% of concrete with 0 to 35% replacement. In addition, the use of the water reducer resulted in lower chloride permeability and corrosion risk. The authors conclude that fly ash content, water reducer, and water-binder ratio (w/ b) are three parameters that influence corrosion risk.

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  • Authors:
    • Sujjavanich, Suvimol
    • Sida, Voradej
    • Suwanvitaya, Prasert
  • Publication Date: 2005-5


  • English

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  • Accession Number: 01001833
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 7 2005 7:33AM