Adhesion enhancement and protection of concrete against aggressive environment using graphite-Fe2O3 modified epoxy coating. (23rd May 2023)

• Record Type: Journal Article
• Authors: Dorado, F.; Toledo, L.; de la Osa, A.R.; Esteban-Arranz, A.; Sacristan, J.; Pellegrin, B.; Steck, J.; Sanchez-Silva, L.
• Is Part Of: Construction & building materials. Volume 379(2023)
• Publication Date: 2023-05-23
• Subjects: Adhesion enhancement -- Epoxy resin coatings -- Fe2O3 nanoparticles -- Nanoparticles emission; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2023.131179
• Languages: English
• ISSNs: 0950-0618

Abstract

Graphical abstract: Highlights: Synthetized Fe2 O3 NPs into a graphite matrix offered promising adhesion values. 3 wt% composite into epoxy resin fulfil a compromise between adhesion and solubility. An improvement over a 20% in adhesion was detected before and after ageing. Better abrasion resistance in the nano-enabled epoxy resin than the original one. Abstract: This study aimed to improve the performance of epoxy resin coatings for protecting concrete structures from chemical corrosion and surface abrasion. The research involved incorporating Fe2 O3 nanoparticles into a carbonaceous matrix in a two-part epoxy resin coating. Concrete slabs with the modified coating underwent accelerated ageing under harsh conditions. It was found that the nanomodified coatings showed a significant improvement in performance compared to unmodified coatings. The effect of the amount of composite added to the epoxy system was analyzed. Results show that adding 3 wt% of the synthesized Fe2 O3 nanoparticles into a graphite carbonaceous matrix offered the most promising adhesion values. Moreover, adding 3 wt% of the composite into epoxy resin fulfilled a compromise between adhesion improvement and limiting solubility. Finally, it was found a reduction in the number of nanoparticles emitted after ageing. Overall, the incorporation of Fe2 O3 nanoparticles into epoxy resin coatings shows potential for improving their performance and durability.