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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Quiertant, Marc
École Spéciale des Travaux Publics
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (28/28 displayed)
- 2024Long-Term Effects of External Sulfate Attack on Low-Carbon Cementitious Materials at Early Agecitations
- 2024Durability of partially cured GFRP reinforcing bars in alkaline environments with or without sustained tensile loadcitations
- 2023Chemical Mechanisms Involved in the Coupled Attack of Sulfate and Chloride Ions on Low-Carbon Cementitious Materials: An In-Depth Studycitations
- 2023Chemical Mechanisms Involved in the Coupled Attack of Sulfate and Chloride Ions on Low-Carbon Cementitious Materials: An In-Depth Studycitations
- 2023Numerical Modelling of the Nonlinear Shear Creep Behavior of FRP-Concrete Bonded Jointscitations
- 2022Effect of the Cyclic Crack Opening-Closure during Epoxy-Curing Period of a CFRP Strengthening System Bonded on Concrete Substrate
- 2022A Critical Review of Existing Test-Methods for External Sulfate Attackcitations
- 2021Accelerated Aging Behavior in Alkaline Environments of GFRP Reinforcing Bars and Their Bond with Concrete.citations
- 2020Experimental and Numerical Investigation on the Strain Response of Distributed Optical Fiber Sensors Bonded to Concrete : Influence of the Adhesive Stiffness on Crack Monitoring Performancecitations
- 2019Durability of flax/bio-epoxy composites intended for strengthening applications in construction
- 2018Mobile device to perform a single lap shear test on frp bonded on a concrete real structure
- 2018Durability of flax/bio-based epoxy composites intended for structural strengtheningcitations
- 2017Effects of Ageing on the Bond Properties of Carbon Fiber Reinforced Polymer/Concrete Adhesive Joints: Investigation Using a Modified Double Shear Testcitations
- 2016Experimental study of corrosion-induced degradation of reinforced concrete elements
- 2016Instrumentation of large scale direct shear test to study the progressive failure of concrete/rock interface
- 2014Mechanical behaviour of aramid fiber reinforced polymer (AFRP) rebar/concrete interfaces
- 2013Recent experimental investigations on reinforced UHPFRC for applications in earthquake engineering and retrofitting
- 2013Low temperature bond behavior of concrete with braided aramid fiber bars
- 2013Low temperature behavior of braided aramid fiber bars/concrete interface
- 2012Adhesively bonded composite reinforcements for steel structures: durability of the stress transfer
- 2012AN INNOVATIVE EXPERIMENTAL DEVICE TO CHARACTERIZE THE CREEP BEHAVIOR OF CONCRETE /FRP ADHESIVE BOND
- 2012Analysis of the non linear creep behaviour of FRP-concrete bonded assembliescitations
- 2011Durability of FRP strengthened concrete specimens under accelerated ageing, In : Organic Material for Sustainable Construction
- 2010Use of a single lap shear test to characterize composite-to-concrete or composite-to-steel bonded interfacescitations
- 2010Experimental and numerical analysis of corrosion induced cover cracking in reinforced concrete beam
- 2010Durability of adhesively bonded composite reinforcements for concrete structures
- 2010Influence of the properties of externally bonded CFRP on the shear behavior of concrete/composite adhesive jointscitations
- 2010Effects of accelerated ageing on the adhesive bond between concrete specimens and external CFRP reinforcements
Places of action
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article
Chemical Mechanisms Involved in the Coupled Attack of Sulfate and Chloride Ions on Low-Carbon Cementitious Materials: An In-Depth Study
Abstract
<jats:p>This study aims to analyze the individual and combined chemical attacks of sulfate and chloride ions on cementitious materials and assess the efficiency of some selected additives (fly ash, blast furnace slag, and metakaolin) in countering this combined attack. This research is conducted in the context of construction in marine environments, where reinforced concrete structures are often subject to significant challenges due to early exposure to sulfate and chloride ions. This early exposure results in concrete expansion, cracking, and, ultimately, the corrosion of steel reinforcements. Nevertheless, the interaction between sulfate ions, chloride ions, and the cementitious matrix remains poorly understood. Previous research has drawn conflicting conclusions, with some suggesting that sulfate ions mitigate chloride attacks, while others have come to the opposite conclusion. During this study, experimental investigations were conducted by immersing powders obtained from crushed ordinary Portland cement (CEM I) paste specimens, as well as binary, ternary, and quaternary blends, in sulfate, chloride, and sulfate–chloride solutions over the course of 25 days at an early age. Results from different characterization techniques (thermogravimetric analysis, Fourier Transform Infrared spectroscopy, Raman spectroscopy, etc.) indicate that chloride ions delay the formation of ettringite, while the presence of sulfate ions accelerates the chloride attack by limiting the formation of Friedel’s salt. The Mercury Intrusion Porosimetry test confirmed these results by showing a pronounced increase in specimens’ porosity after exposure to solely sulfate after 25 days, compared to the ones exposed to both sulfate and chloride ions. Furthermore, the incorporation of multiple additives, particularly in ternary and quaternary blends, demonstrates the enhanced durability of the studied samples. This was confirmed by a Fourier Transform Infrared spectroscopy analysis, which indicated a delayed ettringite formation in these mixtures. This delay was further affirmed by the complete depletion of sulfate ions in the sulfate solutions upon contact with powders derived from the 100% CEM I paste.</jats:p>