Reacción Álcali – Sílice en hormigones con ceniza de cáscara de arroz residual
| cic.isFulltext | true | es |
| cic.isPeerReviewed | true | es |
| cic.lugarDesarrollo | Laboratorio de Entrenamiento Multidisciplinario para la Investigación Tecnológica | es |
| cic.parentType | Articulo | |
| cic.version | info:eu-repo/semantics/submittedVersion | es |
| dc.date.accessioned | 2014-12-15T11:53:14Z | |
| dc.date.available | 2014-12-15T11:53:14Z | |
| dc.identifier.uri | https://digital.cic.gba.gob.ar/handle/11746/129 | |
| dc.title | Reacción Álcali – Sílice en hormigones con ceniza de cáscara de arroz residual | es |
| dc.type | Artículo | es |
| dcterms.abstract | Since 2006, the LEMIT-CIC has developed research projects together with the Centro de Tecnología, Departamento de Estruturas e Construção Civil (GEPECON/UFSM Universidade Federal de Santa Maria, Brasil) and the Universidad de la República (UDELAR, Montevideo, Uruguay) on the use of residual rice-husk ash (RHA) in concrete. The RHA is a supplementary cementing material of great interest in many developing countries. To obtain a good pozzolan the rice-husk needs to be burnt at a controlled temperature and ground before incorporating in concrete. In other conditions a residual RHA is obtained with a lower quality, but it can be improved by grinding (GRHA). As a way to simplify RHA processing, it was demonstrated in the performed joint projects that it is possible to produce structural concretes incorporating residual RHA without previous grinding (NRHA), adapting concrete mixing process to optimize the ash particle size. In this way the use of RHA nearby where it is produced can be enhanced. Nevertheless as RHA has siliceous vitreous minerals and cristobalite, deleterious reactions with portland cement can take place when alkalis and certain environmental conditions are present. This paper describes the studies performed at LEMIT on the development of alkali - silica reaction (ASR) in mortars and concretes prepared with NRHA and GRHA. Results of mortar and concrete expansions, mechanical properties, and field studies on prototypes are discussed. The research shows that when using NRHA there can be risks of cracking according to the alkali content and binders used. | en |
| dcterms.alternative | Alkali-Silica reaction in concretes with residual rice-husk ash | en |
| dcterms.creator.author | Giaccio, Graciela Marta | es |
| dcterms.creator.author | Zerbino, Raúl | es |
| dcterms.extent | 10 p. | es |
| dcterms.isPartOf.issue | nº 2 | es |
| dcterms.isPartOf.series | Ciencia y Tecnología de los Materiales | es |
| dcterms.issued | 2012 | |
| dcterms.language | Español | es |
| dcterms.license | Attribution 4.0 International (BY 4.0) | es |
| dcterms.subject | rice-husk ash | en |
| dcterms.subject | concrete | en |
| dcterms.subject | alkali-silica reaction | en |
| dcterms.subject | waste management | en |
| dcterms.subject.materia | Hormigón | es |
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