Aggregate Passivation: Lithium Hydroxide Aggregate Treatment to Suppress Alkali-Silica Reaction

Craig W. Hargis, Maria C. G. Juenger, Paulo J. M. Monteiro

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Alkali-silica reaction (ASR) continues to be a concrete durability problem despite the many physical and chemical mitigation techniques known to successfully prevent it. The research presented herein tested a new method to limit ASR: aggregate passivation. A lithium silicate layer was created on reactive natural siliceous aggregate surfaces by treating the aggregates in a lithium hydroxide solution prior to use. A 4 M LiOH treatment was found to be superior to a 2 M LiOH treatment in producing a lithium silicate passivation layer and in reducing expansion due to ASR. The use of passivated aggregates greatly reduced expansion in accelerated mortar bar tests compared to nonpassivated aggregates and lithium-based admixtures.
Original languageEnglish (US)
Pages (from-to)567-575
Number of pages9
JournalACI MATERIALS JOURNAL
Volume110
Issue number5
StatePublished - 2013
Externally publishedYes

Fingerprint

Dive into the research topics of 'Aggregate Passivation: Lithium Hydroxide Aggregate Treatment to Suppress Alkali-Silica Reaction'. Together they form a unique fingerprint.

Cite this