Self-protection concrete measures as prevention measure from chloride transport and corrosion of reinforcement
Incorporation of additives into a reinforced concrete matrix to delay or even completely avoid the initiation of corrosion during the service-life of the construction is a widely pursued topic. One of the new promising technologies achieving increased interest is to incorporate corrosion inhibitors...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2023-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_07003.pdf |
| _version_ | 1797835269205917696 |
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| author | Alonso Maria Cruz Prieto Miguel Pilz Monika Gomez Amaia Maia Frederico |
| author_facet | Alonso Maria Cruz Prieto Miguel Pilz Monika Gomez Amaia Maia Frederico |
| author_sort | Alonso Maria Cruz |
| collection | DOAJ |
| description | Incorporation of additives into a reinforced concrete matrix to delay or even completely avoid the initiation of corrosion during the service-life of the construction is a widely pursued topic. One of the new promising technologies achieving increased interest is to incorporate corrosion inhibitors encapsulated in layered double hydroxide (LDH). LDH structures follow a controlled release of the inhibitor while chloride is efficiently trapped at the same time. Another type of nanostructure additive offering self-protection ability in concrete is polyhedral oligomeric silsesquioxanes (POSS) developed to exhibit water-repellent functionalities protecting the reinforcement from corrosive attack. In the present laboratory work, the enhanced performance of concrete infrastructures in a marine environment was studied using a SCC design. The addition of LDH (0.5, 1 and 2 % by mass of binder (bmb)) and POSS (2 and 4 % additive level) was explored. Migration and diffusion Cl transport tests have been performed towards corrosion protection of reinforcing bars. The results showed that Cl transport decreases with the concrete maturity, and this is even more effective for concretes with LDH and POSS. This delay effect is more pronounced in the unidirectional diffusional Cl transport. LDH is significantly retarding the initiation of rebar corrosion. |
| first_indexed | 2024-04-09T14:51:29Z |
| format | Article |
| id | doaj.art-e6706d93f8894792b224f297536da270 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-04-09T14:51:29Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-e6706d93f8894792b224f297536da2702023-05-02T09:34:12ZengEDP SciencesMATEC Web of Conferences2261-236X2023-01-013780700310.1051/matecconf/202337807003matecconf_smartincs2023_07003Self-protection concrete measures as prevention measure from chloride transport and corrosion of reinforcementAlonso Maria Cruz0Prieto Miguel1Pilz Monika2Gomez Amaia3Maia Frederico4Eduardo Torroja Institute of construction Science (IETcc-CSIC)RISE Research Institutes of Sweden, Dep. Infrastructure and Concrete TechnologySINTEF AS represented by SINTEF Industry, Department of Process TechnologyAcciona Construction Technological centerSmallmatek – Small Materials and Technologies, Lda, Rua dos CanhasIncorporation of additives into a reinforced concrete matrix to delay or even completely avoid the initiation of corrosion during the service-life of the construction is a widely pursued topic. One of the new promising technologies achieving increased interest is to incorporate corrosion inhibitors encapsulated in layered double hydroxide (LDH). LDH structures follow a controlled release of the inhibitor while chloride is efficiently trapped at the same time. Another type of nanostructure additive offering self-protection ability in concrete is polyhedral oligomeric silsesquioxanes (POSS) developed to exhibit water-repellent functionalities protecting the reinforcement from corrosive attack. In the present laboratory work, the enhanced performance of concrete infrastructures in a marine environment was studied using a SCC design. The addition of LDH (0.5, 1 and 2 % by mass of binder (bmb)) and POSS (2 and 4 % additive level) was explored. Migration and diffusion Cl transport tests have been performed towards corrosion protection of reinforcing bars. The results showed that Cl transport decreases with the concrete maturity, and this is even more effective for concretes with LDH and POSS. This delay effect is more pronounced in the unidirectional diffusional Cl transport. LDH is significantly retarding the initiation of rebar corrosion.https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_07003.pdf |
| spellingShingle | Alonso Maria Cruz Prieto Miguel Pilz Monika Gomez Amaia Maia Frederico Self-protection concrete measures as prevention measure from chloride transport and corrosion of reinforcement MATEC Web of Conferences |
| title | Self-protection concrete measures as prevention measure from chloride transport and corrosion of reinforcement |
| title_full | Self-protection concrete measures as prevention measure from chloride transport and corrosion of reinforcement |
| title_fullStr | Self-protection concrete measures as prevention measure from chloride transport and corrosion of reinforcement |
| title_full_unstemmed | Self-protection concrete measures as prevention measure from chloride transport and corrosion of reinforcement |
| title_short | Self-protection concrete measures as prevention measure from chloride transport and corrosion of reinforcement |
| title_sort | self protection concrete measures as prevention measure from chloride transport and corrosion of reinforcement |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_07003.pdf |
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