Petrography of Potentially Alkali Reactive Sandstone from Argentina

cic.isFulltexttruees
cic.isPeerReviewedtruees
cic.lugarDesarrolloCentro de Geología Aplicada, Agua y Medio Ambiente es
cic.versioninfo:eu-repo/semantics/submittedVersiones
dc.date.accessioned2016-10-25T12:58:49Z
dc.date.available2016-10-25T12:58:49Z
dc.identifier.urihttps://digital.cic.gba.gob.ar/handle/11746/4496
dc.titlePetrography of Potentially Alkali Reactive Sandstone from Argentinaen
dc.typeDocumento de conferenciaes
dcterms.abstractPetrographic 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
dcterms.creator.authorMarfil, Silvina Andreaes
dcterms.creator.authorBatic, Oscar R.es
dcterms.creator.authorMaiza, Pedroes
dcterms.extent7 p.es
dcterms.isPartOf.issueXIV International Conference on Alkali-Aggregate Reactionses
dcterms.isPartOf.seriesInternational Conference on Alkali-Aggregate Reactionses
dcterms.issued2012
dcterms.languageIngléses
dcterms.licenseAttribution 4.0 International (BY 4.0)es
dcterms.subjectsandstoneen
dcterms.subjectamorphous and/or cryptocrystalline silicaen
dcterms.subjectASRen
dcterms.subjectexpansionen
dcterms.subjectfissuresen
dcterms.subject.materiaGeologíaes
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