Mechanical approach in mitigating alkali-silica reaction

C. K. Yi, C. P. Ostertag

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The effect of steel microfibers (SMF) on alkali-silica reaction (ASR) was investigated using two types of reactive aggregates, crushed opal and a Pyrex rod of constant diameter. Cracks are less visible in the SMF mortars compared with the unreinforced mortars. Due to crack growth resistance behavior in SMF mortar specimens, the strength loss is eliminated and the ASR products remained well confined within the ASR site. The expansion and the ASR products were characterized by microprobe analysis and inductive coupled plasma (ICP) spectroscopy. The confinement due to SMF resulted in a higher Na and Si ion concentration of the ASR liquid extracted from the reaction site. The higher concentration reduced the ASR rate and resulted in a lower reactivity of the reactive Pyrex rods in SMF mortars.

Original languageEnglish
Pages (from-to)67-75
Number of pages9
JournalCement and Concrete Research
Volume35
Issue number1
DOIs
Publication statusPublished - 2005 Jan
Externally publishedYes

Keywords

  • Alkali-aggregate reaction
  • Expansion
  • Fiber reinforcement
  • Microcracking
  • Tensile properties

ASJC Scopus subject areas

  • Building and Construction
  • Materials Science(all)

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