- Title
- Freeze–thaw resistance and sorptivity of fine-grained alkali-activated cement concrete
- Creator
- Tekle, Biruk; Ly, Tran; Hertwig, Ludwig; Holschemacher, Klaus
- Date
- 2023
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/196235
- Identifier
- vital:18673
- Identifier
-
https://doi.org/10.1002/suco.202200902
- Identifier
- ISSN:1464-4177 (ISSN)
- Abstract
- The paper investigates the freeze–thaw resistance and sorptivity behavior of fine-grained alkali-activated concrete cured at ambient temperature. A blended binder system containing fly ash, ground granulated blast furnace slag, and silica fume was used. A combination of sodium hydroxide and sodium silicate was used as an activator. The freeze–thaw resistance was evaluated based on mass loss (scaling), and the extent of internal damage was assessed by testing the ultrasonic time at different cycles. Initial and secondary sorptivity coefficients were calculated based on the cumulative water absorption values at different time intervals. Alkali content, sodium silicate to sodium hydroxide ratio, and water to binder ratio were investigated. The experimental results showed that water to binder ratio is the most significant parameter for the scaling; higher ratios result in higher scaling. In terms of internal damage, alkali content is the most significant. The increase of alkali increased the amount of internal damage in the concrete. The initial sorptivity coefficient increased with the water and alkali content and decreased with the silicate content. The secondary sorptivity coefficient showed no significant change with the investigated parameters. © 2022 The Authors. Structural Concrete published by John Wiley & Sons Ltd on behalf of International Federation for Structural Concrete.
- Publisher
- John Wiley and Sons Inc
- Relation
- Structural Concrete Vol. 24, no. 3 (2023), p. 4286-4296
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- http://creativecommons.org/licenses/by/4.0/
- Rights
- Copyright © 2022 The Authors
- Rights
- Open Access
- Subject
- 4005 Civil engineering; 4016 Materials engineering; Alkali-activated; Ambient curing; Blast furnace slag; Fly ash; Freeze–thaw resistance; Geopolymer; Internal damage; Scaling; Silica fume; Sorptivity; Water absorption
- Full Text
- Reviewed
- Funder
- The authors gratefully acknowledge the financial support of the Alexander von Humboldt Foundation (1206836‐AUS‐HFST‐P).
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