TY - JOUR
T1 - Aggregate Passivation: Lithium Hydroxide Aggregate Treatment to Suppress Alkali-Silica Reaction
AU - Hargis, Craig W.
AU - Juenger, Maria C. G.
AU - Monteiro, Paulo J. M.
N1 - KAUST Repository Item: Exported on 2021-09-21
Acknowledged KAUST grant number(s): KUS-11-004021
Acknowledgements: This publication was based on work supported in part by the National Science Foundation (Grant No. CMMI 0448983), King Abdullah University of Science and Technology (KAUST) (Award No. KUS-11-004021), and the first author was supported by the Berkeley Fellowship for Graduate Study.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/671335
UR - https://www.concrete.org/publications/internationalconcreteabstractsportal.aspx?m=details&ID=51685908
M3 - Article
SN - 1944-737X
VL - 110
SP - 567
EP - 575
JO - ACI MATERIALS JOURNAL
JF - ACI MATERIALS JOURNAL
IS - 5
ER -