Screening of agents for self-healing concrete exposed to freeze-thaw cycles with de-icing salts
- Author
- Vanessa Giaretton Cappellesso (UGent) , Tim Van Mullem (UGent) , Elke Gruyaert, Kim Van Tittelboom (UGent) and Nele De Belie (UGent)
- Organization
- Abstract
- In cold climates, concrete structures suffer from freezing and thawing (FT) effects with de-icing salts used to melt the ice on the roads. Optimization of the mix design could help to minimize its impact, but it cannot be that helpful after crack formation. Cracks are pathways for aggressive substances and allow water expansion during the freezing period, creating microcracks throughout the concrete. Self-healing concrete might contribute to mitigating the damage in these extreme conditions. However, the healing agent must resist the freeze-thaw cycles and prevent chloride ingress. Three healing agents were manually injected into cracks: polyurethane (PU), water repellent agent (WRA) and sodium silicate solution (SS). A capillary water absorption test was performed to quantify their sealing efficiency. The weight of the scaled material and the chloride ingress were used to assess the damage caused by 56 days of FT cycles. The WRA reduced the water uptake by 66%, the SS by 33% and the PU by 27%. The samples treated with WRA showed less scaling and samples treated with SS and PU showed similar performance. In contrast, the reference concrete had released the most scaled material. After FT, PU showed the best performance to prevent chloride ingress into the crack.
- Keywords
- Concrete, Freeze-thaw, Chlorides, Healing agents, Durability
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01GRTWBYC0K6WYC0KJYA13R6P1
- MLA
- Giaretton Cappellesso, Vanessa, et al. “Screening of Agents for Self-Healing Concrete Exposed to Freeze-Thaw Cycles with de-Icing Salts.” 76th Annual RILEM Week and the International Conference on Regeneration and Conservation of Structures (ICRCS 2022), Proceedings, 2022.
- APA
- Giaretton Cappellesso, V., Van Mullem, T., Gruyaert, E., Van Tittelboom, K., & De Belie, N. (2022). Screening of agents for self-healing concrete exposed to freeze-thaw cycles with de-icing salts. 76th Annual RILEM Week and the International Conference on Regeneration and Conservation of Structures (ICRCS 2022), Proceedings. Presented at the 76th RILEM Annual Week and International Conference on Regeneration and Conservation of Structures (ICRCS 2022), Kyoto, Japan.
- Chicago author-date
- Giaretton Cappellesso, Vanessa, Tim Van Mullem, Elke Gruyaert, Kim Van Tittelboom, and Nele De Belie. 2022. “Screening of Agents for Self-Healing Concrete Exposed to Freeze-Thaw Cycles with de-Icing Salts.” In 76th Annual RILEM Week and the International Conference on Regeneration and Conservation of Structures (ICRCS 2022), Proceedings.
- Chicago author-date (all authors)
- Giaretton Cappellesso, Vanessa, Tim Van Mullem, Elke Gruyaert, Kim Van Tittelboom, and Nele De Belie. 2022. “Screening of Agents for Self-Healing Concrete Exposed to Freeze-Thaw Cycles with de-Icing Salts.” In 76th Annual RILEM Week and the International Conference on Regeneration and Conservation of Structures (ICRCS 2022), Proceedings.
- Vancouver
- 1.Giaretton Cappellesso V, Van Mullem T, Gruyaert E, Van Tittelboom K, De Belie N. Screening of agents for self-healing concrete exposed to freeze-thaw cycles with de-icing salts. In: 76th annual RILEM week and the International Conference on Regeneration and Conservation of Structures (ICRCS 2022), Proceedings. 2022.
- IEEE
- [1]V. Giaretton Cappellesso, T. Van Mullem, E. Gruyaert, K. Van Tittelboom, and N. De Belie, “Screening of agents for self-healing concrete exposed to freeze-thaw cycles with de-icing salts,” in 76th annual RILEM week and the International Conference on Regeneration and Conservation of Structures (ICRCS 2022), Proceedings, Kyoto, Japan, 2022.
@inproceedings{01GRTWBYC0K6WYC0KJYA13R6P1,
abstract = {{In cold climates, concrete structures suffer from freezing and thawing (FT) effects with de-icing salts used to melt the ice on the roads. Optimization of the mix design could help to minimize its impact, but it cannot be that helpful after crack formation. Cracks are pathways for aggressive substances and allow water expansion during the freezing period, creating microcracks throughout the concrete. Self-healing concrete might contribute to mitigating the damage in these extreme conditions. However, the healing agent must resist the freeze-thaw cycles and prevent chloride ingress. Three healing agents were manually injected into cracks: polyurethane (PU), water repellent agent (WRA) and sodium silicate solution (SS). A capillary water absorption test was performed to quantify their sealing efficiency. The weight of the scaled material and the chloride ingress were used to assess the damage caused by 56 days of FT cycles. The WRA reduced the water uptake by 66%, the SS by 33% and the PU by 27%. The samples treated with WRA showed less scaling and samples treated with SS and PU showed similar performance. In contrast, the reference concrete had released the most scaled material. After FT, PU showed the best performance to prevent chloride ingress into the crack.}},
author = {{Giaretton Cappellesso, Vanessa and Van Mullem, Tim and Gruyaert, Elke and Van Tittelboom, Kim and De Belie, Nele}},
booktitle = {{76th annual RILEM week and the International Conference on Regeneration and Conservation of Structures (ICRCS 2022), Proceedings}},
keywords = {{Concrete,Freeze-thaw,Chlorides,Healing agents,Durability}},
language = {{eng}},
location = {{Kyoto, Japan}},
pages = {{4}},
title = {{Screening of agents for self-healing concrete exposed to freeze-thaw cycles with de-icing salts}},
year = {{2022}},
}