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 language | English (US) |
|---|---|
| Pages (from-to) | 567-575 |
| Number of pages | 9 |
| Journal | ACI MATERIALS JOURNAL |
| Volume | 110 |
| Issue number | 5 |
| State | Published - 2013 |
| Externally published | Yes |
Bibliographical note
KAUST Repository Item: Exported on 2021-09-21Acknowledged 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.