An integrated and eco-friendly approach for corrosion inhibition and microstructural densification of reinforced concrete by immobilizing Bacillus subtilis in pyrolytic sugarcane-bagasse. (25th June 2022)

• Record Type: Journal Article
• Authors: Kanwal, Maria; Khushnood, Rao Arsalan; Shahid, Muhammad; Wattoo, Abdul Ghafar
• Is Part Of: Journal of cleaner production. Volume 355(2022)
• Publication Date: 2022-06-25
• Subjects: Pyrolysis -- Sugarcane bagasse -- Biochar -- Corrosion inhibition -- Chlorides migration -- Tafel polarization; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2022.131785
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: The potential use of carbonaceous sugarcane bagasse as carrier media of Bacillus subtilis in amending microstructure and corrosion inhibition of reinforced concrete is explored in this study. The chlorides migration inside the concrete, electrochemical performance of embedded steel along with healing and densification in microstructure were assessed. There was a 53.78% reduction in the depth of migrated chlorides due to the densification of concrete matrix by spherical to rhombohedral calcite precipitation in voids. Besides, bio-immobilized formulation offered 97.5% corrosion inhibition efficiency compared to the control samples when exposed to 5% NaCl-based electrolyte for 12.5 months. Therefore, the integrated bacterial spores and pyrolytic bagasse biochar could be employed in concrete to improve the microstructure, corrosion inhibition, and to add environmental benefits. Graphical abstract: Image 1