Effectiveness of Lithium-Based Products in Concrete Made with Canadian Natural Aggregates Susceptible to Alkali-Silica Reactivity

A total of 87 concrete mixtures were made using various lithium glass and lithium nitrate dosages combined or not combined with supplementary cementing materials (SCM) and 12 reactive aggregates of various alkali-silica reaction (ASR) degrees and types in order to evaluate ASR counteraction effectiveness of lithium-based products. The possibility of accelerating testing procedures was evaluated by concrete prism testing at both 38°C (100°F) as well as 60°C (140°F). The 2-year 0.04% expansion limit criterion for six aggregates at 38°C (100°F) was satisfied using lithium nitrate at the manufacturer recommended [lithium]/[sodium + potassium] ratio of .74; a 1.11 ratio was not effective for three aggregates, while for the other three, a ratio between 0.74 and 1.11 was. Provided the slag and fly ashes were properly composed and in sufficient quantities, they were effective, as was the ternary silica fume/slag cement. The lithium glass was not. Significant synergetic effect was not shown in most lithium nitrate-SCM combinations. The reactivity of aggregates is not related to the lithium nitrate dosage required. For the SCM and control mixtures, the 2-year expansion at 38°C (100°F) correlated well with the 6-month expansion at 60°C (140°F), but the lithium nitrate mixtures did not.

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  • Authors:
    • Tremblay, Charles
    • Berube, Marc-Andre
    • Fournier, Benoit
    • Thomas, Michael D A
    • Folliard, Kevin J
  • Publication Date: 2007

Language

  • English

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Filing Info

  • Accession Number: 01049888
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 4 2007 1:49PM