Chloride Diffusion in Concrete Protected with a Silane-Based Corrosion Inhibitor
One of the most important parameters concerning durability is undoubtedly represented by cement matrix resistance to chloride diffusion in environments where reinforced concrete structures are exposed to the corrosion risk induced by marine environment or de-icing salts. This paper deals with protec...
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doaj-e08796fbd7044779bb86dfba1070c94c2020-11-25T03:03:24ZengMDPI AGMaterials1996-19442020-04-01132001200110.3390/ma13082001Chloride Diffusion in Concrete Protected with a Silane-Based Corrosion InhibitorLuigi Coppola0Denny Coffetti1Elena Crotti2Gabriele Gazzaniga3Tommaso Pastore4Department of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine (BG), ItalyDepartment of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine (BG), ItalyDepartment of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine (BG), ItalyDepartment of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine (BG), ItalyDepartment of Engineering and Applied Sciences, University of Bergamo, 24044 Dalmine (BG), ItalyOne of the most important parameters concerning durability is undoubtedly represented by cement matrix resistance to chloride diffusion in environments where reinforced concrete structures are exposed to the corrosion risk induced by marine environment or de-icing salts. This paper deals with protection from chloride ingress by a silane-based surface-applied corrosion inhibitor. Results indicated that the corrosion inhibitor (CI) allows to reduce the penetration of chloride significantly compared to untreated specimens, independently of w/c, cement type, and dosage. Reduction of chloride diffusion coefficient (D<sub>nssn</sub>) measured by an accelerated test in treated concrete was in the range 30–60%. Natural chloride diffusion test values indicate a sharp decrease in apparent diffusion coefficient (D<sub>app</sub>) equal to about 75% when concrete is protected by CI. Mechanism of action of CI in slowing down the chloride penetration inside the cement matrix is basically due to the water repellent effect as confirmed by data of concrete bulk electrical resistivity.https://www.mdpi.com/1996-1944/13/8/2001durability of concretechloride penetrationrebar corrosioncorrosion inhibitorsilane-based surface treatment |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Luigi Coppola Denny Coffetti Elena Crotti Gabriele Gazzaniga Tommaso Pastore |
spellingShingle |
Luigi Coppola Denny Coffetti Elena Crotti Gabriele Gazzaniga Tommaso Pastore Chloride Diffusion in Concrete Protected with a Silane-Based Corrosion Inhibitor Materials durability of concrete chloride penetration rebar corrosion corrosion inhibitor silane-based surface treatment |
author_facet |
Luigi Coppola Denny Coffetti Elena Crotti Gabriele Gazzaniga Tommaso Pastore |
author_sort |
Luigi Coppola |
title |
Chloride Diffusion in Concrete Protected with a Silane-Based Corrosion Inhibitor |
title_short |
Chloride Diffusion in Concrete Protected with a Silane-Based Corrosion Inhibitor |
title_full |
Chloride Diffusion in Concrete Protected with a Silane-Based Corrosion Inhibitor |
title_fullStr |
Chloride Diffusion in Concrete Protected with a Silane-Based Corrosion Inhibitor |
title_full_unstemmed |
Chloride Diffusion in Concrete Protected with a Silane-Based Corrosion Inhibitor |
title_sort |
chloride diffusion in concrete protected with a silane-based corrosion inhibitor |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2020-04-01 |
description |
One of the most important parameters concerning durability is undoubtedly represented by cement matrix resistance to chloride diffusion in environments where reinforced concrete structures are exposed to the corrosion risk induced by marine environment or de-icing salts. This paper deals with protection from chloride ingress by a silane-based surface-applied corrosion inhibitor. Results indicated that the corrosion inhibitor (CI) allows to reduce the penetration of chloride significantly compared to untreated specimens, independently of w/c, cement type, and dosage. Reduction of chloride diffusion coefficient (D<sub>nssn</sub>) measured by an accelerated test in treated concrete was in the range 30–60%. Natural chloride diffusion test values indicate a sharp decrease in apparent diffusion coefficient (D<sub>app</sub>) equal to about 75% when concrete is protected by CI. Mechanism of action of CI in slowing down the chloride penetration inside the cement matrix is basically due to the water repellent effect as confirmed by data of concrete bulk electrical resistivity. |
topic |
durability of concrete chloride penetration rebar corrosion corrosion inhibitor silane-based surface treatment |
url |
https://www.mdpi.com/1996-1944/13/8/2001 |
work_keys_str_mv |
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