Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Influence of mesostasis in volcanic rocks on the alkali-aggregate reaction
Abstract Mesostasis material present in the interstices of volcanic rocks is the main cause of the alkali-aggregate reaction (AAR) in concretes made with these rock aggregates. Mesostasis often is referred to as volcanic glass, because it has amorphous features when analyzed by optical microscopy. However, this study demonstrates that mesostasis in the interstitials of volcanic rocks most often consists of micro to cryptocrystalline mineral phases of quartz, feldspars, and clays. Mesostasis has been identified as having different characteristics, and, thus, this new characterization calls for a re-evaluation of their influence on the reactivity of the volcanic rocks. The main purpose of this study is to correlate the characteristics of mesostasis with the AAR in mortar bars containing basalts and rhyolites.
Influence of mesostasis in volcanic rocks on the alkali-aggregate reaction
Abstract Mesostasis material present in the interstices of volcanic rocks is the main cause of the alkali-aggregate reaction (AAR) in concretes made with these rock aggregates. Mesostasis often is referred to as volcanic glass, because it has amorphous features when analyzed by optical microscopy. However, this study demonstrates that mesostasis in the interstitials of volcanic rocks most often consists of micro to cryptocrystalline mineral phases of quartz, feldspars, and clays. Mesostasis has been identified as having different characteristics, and, thus, this new characterization calls for a re-evaluation of their influence on the reactivity of the volcanic rocks. The main purpose of this study is to correlate the characteristics of mesostasis with the AAR in mortar bars containing basalts and rhyolites.
Influence of mesostasis in volcanic rocks on the alkali-aggregate reaction
Tiecher, Francieli (Autor:in) / Dal Molin, Denise Carpena Coitinho (Autor:in) / Gomes, Márcia Elisa Boscato (Autor:in) / Hasparyk, Nicole Pagan (Autor:in) / Monteiro, Paulo José Meleragno (Autor:in)
Cement and Concrete Composites ; 34 ; 1130-1140
30.07.2012
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Volcanic rock , Mesostasis , Crystallinity , Reactivity , Quartz , Basalt , Rhyolite
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