Petrography of Potentially Alkali Reactive Sandstone from Argentina

cic.isFulltext true es
cic.isPeerReviewed true es
cic.lugarDesarrollo Centro de Geología Aplicada, Agua y Medio Ambiente es
cic.version info:eu-repo/semantics/submittedVersion es 2016-10-25T12:58:49Z 2016-10-25T12:58:49Z
dc.title Petrography of Potentially Alkali Reactive Sandstone from Argentina en
dc.type Documento de conferencia es
dcterms.abstract Petrographic characteristics of sandstone from the Province of Corrientes, Argentina, were studied. The rock has been classified as potentially alkali reactive in previous work using the accelerated mortar bar test method (ASTM C 1260). The average expansion was 0.337% at 16 days and 0.432% at 28 days. Moreover, the concrete prism test (ASTM C 1293) was used. The expansion measured at 1 year was 0.074%, exceeding, at 4 weeks, the limit established for 1 year (0.040%). The rock was classified as quartzose sandstone. The cement is chalcedony, cristobalite, opal and cryptocrystalline quartz, all of them potentially alkali reactive. The study made in fragments of the mortar bar, determined that particles near the surface have no cement, forming an unconsolidated aggregate. Cracks are abundant, affecting the lithological components and the mortar. Siliceous cement in the aggregate particles has been leached, and silica is deposited mainly in voids. The mortar microstructure was studied by SEM-EDS in order to evaluate the characteristics of the deleterious reaction. en Marfil, Silvina Andrea es Batic, Oscar R. es Maiza, Pedro es
dcterms.extent 7 p. es
dcterms.isPartOf.issue XIV International Conference on Alkali-Aggregate Reactions es
dcterms.isPartOf.series International Conference on Alkali-Aggregate Reactions es
dcterms.issued 2012
dcterms.language Inglés es
dcterms.license Attribution 4.0 International (BY 4.0) es
dcterms.subject sandstone en
dcterms.subject amorphous and/or cryptocrystalline silica en
dcterms.subject ASR en
dcterms.subject expansion en
dcterms.subject fissures en
dcterms.subject.materia Geología es
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