Artículo
Stability of acid volcanic glasses in alkaline solutions: Understanding their potential to participate in the alkali-silica reaction
Fecha de publicación:
06/2022
Editorial:
Elsevier
Revista:
Materials Today Communications
ISSN:
2352-4928
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
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.
Palabras clave:
VOLCANIC GLASS
,
REACTIVITY
,
ALKALI-SILICA REACTION
,
ZEOLITES
,
ALKALINE SOLUTIONS
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CICTERRA)
Articulos de CENTRO DE INVEST.EN CS.DE LA TIERRA
Articulos de CENTRO DE INVEST.EN CS.DE LA TIERRA
Citación
Locati, Francisco; Perez Marfil, Paula Mariana; Marfil, Silvina Andrea; Lescano, Leticia; Stability of acid volcanic glasses in alkaline solutions: Understanding their potential to participate in the alkali-silica reaction; Elsevier; Materials Today Communications; 31; 103515; 6-2022; 1-12
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