Effectiveness of corrosion inhibiting admixture combinations in structural concrete

Scott A. Civjan, James M. Lafave, Joanna Trybulski, Daniel Lovett, Jose Lima, Donald W. Pfeifer

Research output: Contribution to journalArticle

Abstract

A long-term corrosion study was conducted to determine the effectiveness of calcium nitrite, silica fume, fly ash, ground granulated blast furnace slag, and DSS in reducing corrosion of reinforcing steel in concrete. Mixture proportions included single, double, and triple combinations of these admixtures. Non-cracked and pre-cracked slab specimens were evaluated by visual inspections, macrocell readings, half-cell potentials, and autopsies. Triple combinations of calcium nitrite, silica fume, and either fly ash or ground granulated blast furnace slag, as well as a double combination of calcium nitrite and ground granulated blast furnace slag, performed very well and are recommended in concrete mixtures exposed to severe corrosive environments. DSS outperformed the other admixtures for corrosion prevention in this study; however, it resulted in somewhat lower compressive strengths and had not been fully tested for effects on other concrete properties.

Original languageEnglish (US)
Pages (from-to)688-703
Number of pages16
JournalCement and Concrete Composites
Volume27
Issue number6
DOIs
StatePublished - Jul 1 2005

Keywords

  • Admixture
  • Concrete
  • Corrosion
  • Durability
  • Pozzolan

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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