Mechanical and durability properties of alkali-activated fly ash concrete with increasing slag content

Timothy A. Aiken, Jacek Kwasny, Wei Sha, Kien Tong

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Abstract

Alkali-activated concrete is a promising alternative to conventional Portland cement-based concrete. However, further understanding in relation to the durability of alkali-activated concrete is required. This paper explores the resistance of alkali-activated concrete mixes to aggressive media that concrete is expected to encounter in-service. Findings indicate that the chloride, freeze-thaw and acid resistance of alkali-activated concrete increases as the slag content and activator increased. However, performance against chloride and freeze-thaw was not as good as that of Portland cement concrete. Acid resistance seems to be a more promising characteristic of alkali-activated concrete compared with Portland cement concrete.
Original languageEnglish
Article number124330
Number of pages17
JournalConstruction and Building Materials
Volume301
Early online date02 Aug 2021
DOIs
Publication statusPublished - 27 Sep 2021

Keywords

  • Durability
  • Geopolymer Concrete
  • Fly Ash
  • Slag
  • Freeze-Thaw
  • Chloride Migration
  • Steel Corrosion

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