Stability of acid volcanic glasses in alkaline solutions: Understanding their potential to participate in the alkali-silica reaction

Locati, Francisco ORCID: https://orcid.org/0000-0001-9067-1497, Pérez Marfil, Paula M., Marfil, Silvina A. and Lescano, Leticia (2022) Stability of acid volcanic glasses in alkaline solutions: Understanding their potential to participate in the alkali-silica reaction. Materials Today Communications, 31. ISSN 2352-4928

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Resumen

Experimental laboratory tests were performed using volcanic glasses from Argentina of variable chemical composition and texture, in 1 N KOH, NaOH, Ca(OH)2 and combined NaOH + KOH + Ca(OH)2 solutions, at 40 °C and up to 10 weeks. The initial materials were characterized by petrography, chemical analysis, XRD, FT-IR and DSC-TGA. The reaction progress was evaluated by XRD, and the final products studied by SEM-EDS. The reactivity of the most reactive glass is attributed to a combination of its high porosity/permeability and alteration degree (indirectly assessed by the volatile mass loss up to ~250 °C). The glass silica content and Ca/(Al+Si) ratio could be other factors affecting the glass reactivity; however, more studies are needed to understand the influence of these variables.

Tipo de documento:	Artículo
DOI:	https://doi.org/10.1016/j.mtcomm.2022.103515
Palabras clave:	Reacción álcali-sílice. Soluciones alcalinas. Reactividad. Vidrio volcánico. Zeolitas.
Temas:	Q Ciencia > Q Ciencia (General) Q Ciencia > QD Química
Unidad académica:	Universidad Católica de Córdoba > Facultad de Ingeniería
Google Académico:	Ver citaciones
URI:	http://pa.bibdigital.ucc.edu.ar/id/eprint/3300

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