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The Influence of External Sulfate Attack on the Durability of Reinforced Mortars in the Presence of Calcined River Sediments
In France, the annual volume of dredged sediments is significantly increasing, which has become a real environmental problem. Nevertheless, these sediments can be used beneficially as supplementary cementing material. On the other hand, external sulfate attack is one of the most aggressive causes of...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10608537/ https://www.ncbi.nlm.nih.gov/pubmed/37895665 http://dx.doi.org/10.3390/ma16206684 |
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author | Benkabouche, Ali Amar, Mouhamadou Benzerzour, Mahfoud Abriak, Nor-Edine T’kint, Michèle Mouli, Mohamed |
author_facet | Benkabouche, Ali Amar, Mouhamadou Benzerzour, Mahfoud Abriak, Nor-Edine T’kint, Michèle Mouli, Mohamed |
author_sort | Benkabouche, Ali |
collection | PubMed |
description | In France, the annual volume of dredged sediments is significantly increasing, which has become a real environmental problem. Nevertheless, these sediments can be used beneficially as supplementary cementing material. On the other hand, external sulfate attack is one of the most aggressive causes of deterioration that affects the durability of concrete structures. This study focused on the valorization of river-dredged sediments from Noyelles-Sous-Lens (Hauts-de-France) as a mineral addition in substitution of Portland cement, and it studied their impacts on the mechanical behavior and durability of reinforced mortars. X-ray diffraction (XRD) analysis indicated the presence of clay minerals in the raw sediment. In order to activate this clay fraction, flash calcination was applied at a temperature of 750 °C. In addition, four mixed mortars were formulated by mixing a Portland cement (CEM I 52.5 N) and the calcined sediments as a partial substitute for cement with proportions of 0%, 15%, 20%, and 30%, then stored in water tanks at room temperature (20 ± 2 °C) for 90 days in order to immerse them in a tank containing a 5% MgSO(4) solution and to track the evolution of their corrosion potential as well as their mass variations every 20 days for a period of 360 days. The following additional tests were carried out on these mortars: tests of resistance to compression and flexion and to porosity by mercury intrusion. The results obtained from the majority of these tests showed that the mortar containing 15% calcined sediments is as effective and durable as the reference mortar itself. The main conclusion we can draw from these results is that the presence of these calcined sediments improves the overall behavior of the mortar. |
format | Online Article Text |
id | pubmed-10608537 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-106085372023-10-28 The Influence of External Sulfate Attack on the Durability of Reinforced Mortars in the Presence of Calcined River Sediments Benkabouche, Ali Amar, Mouhamadou Benzerzour, Mahfoud Abriak, Nor-Edine T’kint, Michèle Mouli, Mohamed Materials (Basel) Article In France, the annual volume of dredged sediments is significantly increasing, which has become a real environmental problem. Nevertheless, these sediments can be used beneficially as supplementary cementing material. On the other hand, external sulfate attack is one of the most aggressive causes of deterioration that affects the durability of concrete structures. This study focused on the valorization of river-dredged sediments from Noyelles-Sous-Lens (Hauts-de-France) as a mineral addition in substitution of Portland cement, and it studied their impacts on the mechanical behavior and durability of reinforced mortars. X-ray diffraction (XRD) analysis indicated the presence of clay minerals in the raw sediment. In order to activate this clay fraction, flash calcination was applied at a temperature of 750 °C. In addition, four mixed mortars were formulated by mixing a Portland cement (CEM I 52.5 N) and the calcined sediments as a partial substitute for cement with proportions of 0%, 15%, 20%, and 30%, then stored in water tanks at room temperature (20 ± 2 °C) for 90 days in order to immerse them in a tank containing a 5% MgSO(4) solution and to track the evolution of their corrosion potential as well as their mass variations every 20 days for a period of 360 days. The following additional tests were carried out on these mortars: tests of resistance to compression and flexion and to porosity by mercury intrusion. The results obtained from the majority of these tests showed that the mortar containing 15% calcined sediments is as effective and durable as the reference mortar itself. The main conclusion we can draw from these results is that the presence of these calcined sediments improves the overall behavior of the mortar. MDPI 2023-10-13 /pmc/articles/PMC10608537/ /pubmed/37895665 http://dx.doi.org/10.3390/ma16206684 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Benkabouche, Ali Amar, Mouhamadou Benzerzour, Mahfoud Abriak, Nor-Edine T’kint, Michèle Mouli, Mohamed The Influence of External Sulfate Attack on the Durability of Reinforced Mortars in the Presence of Calcined River Sediments |
title | The Influence of External Sulfate Attack on the Durability of Reinforced Mortars in the Presence of Calcined River Sediments |
title_full | The Influence of External Sulfate Attack on the Durability of Reinforced Mortars in the Presence of Calcined River Sediments |
title_fullStr | The Influence of External Sulfate Attack on the Durability of Reinforced Mortars in the Presence of Calcined River Sediments |
title_full_unstemmed | The Influence of External Sulfate Attack on the Durability of Reinforced Mortars in the Presence of Calcined River Sediments |
title_short | The Influence of External Sulfate Attack on the Durability of Reinforced Mortars in the Presence of Calcined River Sediments |
title_sort | influence of external sulfate attack on the durability of reinforced mortars in the presence of calcined river sediments |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10608537/ https://www.ncbi.nlm.nih.gov/pubmed/37895665 http://dx.doi.org/10.3390/ma16206684 |
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