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...
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MDPI AG
2023-10-01
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| Online Access: | https://www.mdpi.com/1996-1944/16/20/6684 |
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| author | Ali Benkabouche Mouhamadou Amar Mahfoud Benzerzour Nor-Edine Abriak Michèle T’kint Mohamed Mouli |
| author_facet | Ali Benkabouche Mouhamadou Amar Mahfoud Benzerzour Nor-Edine Abriak Michèle T’kint Mohamed Mouli |
| author_sort | Ali Benkabouche |
| collection | DOAJ |
| 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<sub>4</sub> 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. |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T21:05:41Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-52dc78d41aaf4c38b2c5e8a4843001332023-11-19T17:10:48ZengMDPI AGMaterials1996-19442023-10-011620668410.3390/ma16206684The Influence of External Sulfate Attack on the Durability of Reinforced Mortars in the Presence of Calcined River SedimentsAli Benkabouche0Mouhamadou Amar1Mahfoud Benzerzour2Nor-Edine Abriak3Michèle T’kint4Mohamed Mouli5IMT Nord Europe, Institut Mines-Télécom, Centre des Matériaux et Procédés, 59000 Lille, FranceIMT Nord Europe, Institut Mines-Télécom, Centre des Matériaux et Procédés, 59000 Lille, FranceIMT Nord Europe, Institut Mines-Télécom, Centre des Matériaux et Procédés, 59000 Lille, FranceIMT Nord Europe, Institut Mines-Télécom, Centre des Matériaux et Procédés, 59000 Lille, FranceResearch Unit Eco-Processes, Optimization, and Decision Support, Picardie Jules Verne University, 7 Street Moulin Neuf, 80000 Amiens, FranceDepartment of Civil Engineering, Laboratory of Materials, ENPO, Oran 31000, AlgeriaIn 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<sub>4</sub> 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.https://www.mdpi.com/1996-1944/16/20/6684calcined sedimentsexternal sulfate attackcorrosion potential |
| spellingShingle | Ali Benkabouche Mouhamadou Amar Mahfoud Benzerzour Nor-Edine Abriak Michèle T’kint Mohamed Mouli The Influence of External Sulfate Attack on the Durability of Reinforced Mortars in the Presence of Calcined River Sediments Materials calcined sediments external sulfate attack corrosion potential |
| 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 | calcined sediments external sulfate attack corrosion potential |
| url | https://www.mdpi.com/1996-1944/16/20/6684 |
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