2026-04-17T12:55:56Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2067142025-12-04T20:55:24Zcom_2072_1057col_2072_478796col_2072_478917

High-porosity alkali-activated binders based on glass and aluminium recycling industry waste. Maldonado Alameda, Alex Mañosa Bover, Jofre López-Montero, Teresa Catalán Parra, R. Chimenos Ribera, Josep Ma. Alumini Porositat Porcellana Aluminum Porosity Porcelain The potential as alkali-activated precursors of ceramic-stone-porcelain (CSP) and PAVAL, two residues derived from the optical separation of glass cullet and salt slag from secondary aluminium recycling, has been assessed. Alkali-activated CSP and PAVAL binders' formulations were prepared using NaOH 4 M and 6 M as alkaline activator solutions. The effect of the Na2O/Al2O3 ratio and alkaline activator concentration was evaluated from a chemical, physical, mechanical, and environmental perspective. The results revealed the formation of secondary reaction products attributed to the formation of (C,N)-A-S-H gels. It also showed the influence of decreasing Na2O/Al2O3 ratio in the obtained binders, increasing porosity and affecting the mechanical performance. Besides, it was demonstrated that PAVAL acts as a precursor and pore-generator. Finally, the environmental characterisation showed a significant leaching concentration of heavy metal(loid)s such as As, Cr, Mo, Sb, and Se, which decreases with longer curing periods. 2024-01-30T18:29:23Z 2024-01-30T18:29:23Z 2023-08-04 2024-01-30T18:29:24Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0950-0618 https://hdl.handle.net/2445/206714 739073 eng Reproducció del document publicat a: https://doi.org/10.1016/j.conbuildmat.2023.132741 Construction and Building Materials, 2023, vol. 400, p. 1-11 https://doi.org/10.1016/j.conbuildmat.2023.132741 cc-by-nc-nd (c) Maldonado Alameda, Alex et al., 2023 http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess 11 p. application/pdf Elsevier Articles publicats en revistes (Ciència dels Materials i Química Física)