Mostrar el registro sencillo del ítem
dc.contributor.author
Zerbino, Raul Luis
dc.contributor.author
Giaccio, Graciela Marta
dc.contributor.author
Marfil, Silvina Andrea
dc.date.available
2018-01-15T18:17:18Z
dc.date.issued
2014-11
dc.identifier.citation
Zerbino, Raul Luis; Giaccio, Graciela Marta; Marfil, Silvina Andrea; Evaluation of alkali–silica reaction in concretes with natural rice husk ash using optical microscopy; Elsevier; Construction And Building Materials; 71; 11-2014; 132-140
dc.identifier.issn
0950-0618
dc.identifier.uri
http://hdl.handle.net/11336/33270
dc.description.abstract
The use of rice husk ash as a supplementary cementing material is of great interest to many developing countries where rice production is in abundance. A highly reactive pozzolan is obtained when rice husk ash is burnt under controlled conditions. Previous work showed that it is possible to use residual rice husk ash “as nature” (natural rice husk ash). Nevertheless, it was observed that the incorporation of natural rice husk ash implies risks of expansions and mechanical degradation due to the reactions with alkalis. Based on the performance of slab prototypes placed outdoors during more than 3 years, this work analyzes the causes and the damage processes involved in the development of expansions in presence of natural rice husk ash. Optical microscopy observations on thin sections; crack patterns of the slabs and the strength and surface strain evolution along the time were evaluated. Visual and microscope observations showed clear signs of damage due to expansive reactions in concretes incorporating natural rice husk ash when high alkalis contents are available; although not gel was found, numerous cracks and voids were observed close to unburned rice husk particles, as well as high expansions and significant decreases in strength and stiffness. In concretes with alkalis contents lower than 3 kg/m3, even with the same percentages of natural rice husk ash, there were no significant decreases in the mechanical properties.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Cement
dc.subject
Concrete
dc.subject
Mechanical Properties
dc.subject
Microscopy
dc.subject
Rice-Husk Ash
dc.subject.classification
Ingeniería de los Materiales
dc.subject.classification
Ingeniería de los Materiales
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
Evaluation of alkali–silica reaction in concretes with natural rice husk ash using optical microscopy
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-01-15T17:35:13Z
dc.journal.volume
71
dc.journal.pagination
132-140
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Zerbino, Raul Luis. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de La Plata; Argentina. Laboratorio de Entrenamiento Multidisciplinario para la Investigación Tecnológica. La Plata; Argentina
dc.description.fil
Fil: Giaccio, Graciela Marta. Universidad Nacional de La Plata; Argentina. Laboratorio de Entrenamiento Multidisciplinario para la Investigación Tecnológica. La Plata; Argentina
dc.description.fil
Fil: Marfil, Silvina Andrea. Universidad Nacional del Sur; Argentina
dc.journal.title
Construction And Building Materials
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.conbuildmat.2014.08.022
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0950061814009337
Archivos asociados