Use of mineral admixtures for enhanced resistance against sulfate attack

H. N. Atahan, D. Dikme

Research output: Contribution to journalArticlepeer-review

100 Citations (Scopus)

Abstract

The effect of mineral admixtures such as nano silica, micro silica, fly ash and ground granulated blast furnace slag on the expansion of mortar bars caused by internal and external sulfate attack was investigated. According to data recorded through 12 months, all of the mineral additives, particularly slag, have significantly reduced the expansions caused by sulfate attack. It was shown that, the effectiveness of nano silica was also very significant. When used with sulfate contaminated sands, high sulfate resistant mixtures were produced with 4-6% nano silica replacement ratios. In the case of external sulfate attack, however, only 2% nano silica is most likely enough for keeping the expansions below 0.03% after 12 months.

Original languageEnglish
Pages (from-to)3450-3457
Number of pages8
JournalConstruction and Building Materials
Volume25
Issue number8
DOIs
Publication statusPublished - Aug 2011

Keywords

  • Colloidal silica
  • Expansion
  • External sulfate attack (ESA)
  • Fly ash
  • GGBS
  • Internal sulfate attack (ISA)
  • Micro silica
  • Nano silica
  • Sulfate contaminated aggregate

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