Damage behaviours of concrete and prediction models under the joint effect of freeze–thaw attack and ultraviolet radiation

R. J. Wang; R. Qin; Y. Li; J. X. Li; C. Zhang

doi:10.3989/mc.2019.12018

Autores/as

R. J. Wang State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi’an University of Technology https://orcid.org/0000-0002-4421-6765
R. Qin State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi’an University of Technology https://orcid.org/0000-0003-0343-1167
Y. Li State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi’an University of Technology https://orcid.org/0000-0002-6001-758X
J. X. Li College of Civil and Environmental Engineering, University of New South Wales https://orcid.org/0000-0002-4489-5489
C. Zhang State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi’an University of Technology https://orcid.org/0000-0002-0865-3191

DOI:

https://doi.org/10.3989/mc.2019.12018

Palabras clave:

Hormigón, Hielo/deshielo, Microscopía Electrónica de Barrido (MEB), Durabilidad, Resistencia a la flexión

Resumen

Se analiza la relación, en hormigones, del efecto conjunto del ataque hielo-deshielo y la radiación ultravioleta en función de sus parámetros de Pérdida de Masa (PM), Módulo Dinámico de Elasticidad (MDRE) y Resistencia a la Flexión, a partir del tratamiento estadístico de los resultados (ANOVA). Se ha constatado que la proporción agua/cemento (o aglomerante) (w/c) influyó significativamente sobre la Pérdida de Masa (PM), MDRE y Resistencia a la Flexión. La radiación UV, tuvo un efecto significativo sobre PM pero apenas en los otros dos parámetros analizados. La evolución del deterioro en el hormigón se evaluó estudiando su microestructura a partir de Microscopía Electrónica de Barrido de Electrones Secundarios (MEB-SSE). A partir de esta investigación se propuso un modelo predictivo del grado de deterioro del hormigón, concluyéndose que los datos de predicción tenían una buena relación con los datos experimentales encontrados.

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Citas

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