Show simple item record 2016-09-27T14:50:14Z 2016-09-27T14:50:14Z
dc.title Use of natural zeolites as ASR inhibitor in basaltic rocks en
dc.type Documento de conferencia es
dcterms.abstract The capacity of a natural zeolite from the province of La Rioja (Argentina) to inhibit the alkali-silica reaction (ASR) was studied. The pozzolanic material corresponds to a mixture of clinoptilolite zeolite with minor gypsum, quartz and feldspar discarded in spoil heaps in a quarry. An alkali-reactive basaltic aggregate from a quarry in the Argentine Mesopotamia region was used for the study. Two series of tests according to the accelerated mortar bar method (IRAM 1674) were carried out. One set with 0% (control specimen), 10%, 15% and 20% replacement of cement by natural zeolite and another with the same percentages but using milled zeolite. To monitor the reaction process, mortar bars were studied after the test by stereomicroscopy, polarizing microscopy and SEM-EDS. After 16 days of testing, a reduction in expansion (~42 %) was detected in the mortars with 20% replacement by natural zeolite. However, their behaviour was still reactive. On the other hand, the mortars with 20% replacement by milled zeolite produced a 90% reduction in expansion at 16 days, below the limit prescribed by the standard. A simple milling process transforms this material into a good pozzolanic material inhibiting the alkali-reactivity of basaltic aggregates. en
dcterms.extent p. 381-392 es
dcterms.issued 2015-09
dcterms.language Inglés es
dcterms.license Attribution 4.0 International (BY 4.0) es
dcterms.spatial La Rioja (Argentina) es
dcterms.subject Zeolitas es
dcterms.subject reacción álcali-sílice es
cic.version info:eu-repo/semantics/publishedVersion es Locati, Francisco es Falcone, Darío Daniel es Marfil, Silvina Andrea es Raggiotti, Belén es
cic.lugarDesarrollo Centro de Geología Aplicada, Agua y Medio Ambiente es
dcterms.subject.materia Ingeniería de los Materiales es
dcterms.isPartOf.item Informe científico de investigador: Marfil, Silvina Andrea (2013-2014) es
dcterms.isPartOf.item Informe de personal de apoyo: Falcone, Darío Daniel (2014-2015) es
dcterms.isPartOf.series International Conference on Sustainable Structural Concrete (La Plata, Argentina) es
cic.isPeerReviewed true es
cic.isFulltext true es


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