Effects of Red Mud Addition in the Microstructure, Durability and Mechanical Performance of Cement Mortars
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Título: | Effects of Red Mud Addition in the Microstructure, Durability and Mechanical Performance of Cement Mortars |
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Autor/es: | Ortega, José Marcos | Cabeza, Marta | Tenza-Abril, Antonio José | Real, Teresa | Climent, Miguel-Ángel | Sánchez, Isidro |
Grupo/s de investigación o GITE: | Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura | Tecnología de Materiales y Territorio (TECMATER) |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ingeniería Civil |
Palabras clave: | Sustainability | Red mud | Microstructure | Durability | Chloride ingress resistance | Mechanical properties | Impedance spectroscopy |
Área/s de conocimiento: | Ingeniería de la Construcción |
Fecha de publicación: | 8-mar-2019 |
Editor: | MDPI |
Cita bibliográfica: | Ortega JM, Cabeza M, Tenza-Abril AJ, Real-Herraiz T, Climent MÁ, Sánchez I. Effects of Red Mud Addition in the Microstructure, Durability and Mechanical Performance of Cement Mortars. Applied Sciences. 2019; 9(5):984. doi:10.3390/app9050984 |
Resumen: | Recently, there has been a great effort to incorporate industrial waste into cement-based materials to reach a more sustainable cement industry. In this regard, the Bayer process of obtaining alumina from bauxite generates huge amounts of waste called red mud. Few research articles have pointed out the possibility that red mud has pozzolanic activity. In view of that, the objective of this research is to analyse the short-term effects in the pore structure, mechanical performance and durability of mortars which incorporate up to 20% of red mud as a clinker replacement. As a reference, ordinary Portland cement and fly ash Portland cement mortars were also studied. The microstructure was characterised through mercury intrusion porosimetry and non-destructive impedance spectroscopy, which has not previously been used for studying the pore network evolution of red mud cement-based materials. The possible pozzolanic activity of red mud has been checked using differential scanning calorimetry. The non-steady state chloride migration coefficient and the mechanical properties were studied too. According to the results obtained, the addition of red mud entailed a greater microstructure refinement of the mortar, did not worsen the resistance against chloride ingress and reduced the compressive strength compared to control binders. |
Patrocinador/es: | Part of this research was funded by the Spanish Agencia Estatal de Investigación (grant code BIA2016-80982-R) and by the European Regional Development Fund (grant code BIA2016-80982-R). |
URI: | http://hdl.handle.net/10045/89447 |
ISSN: | 2076-3417 |
DOI: | 10.3390/app9050984 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.3390/app9050984 |
Aparece en las colecciones: | INV - TECMATER - Artículos de Revistas INV - DMCIA - Artículos de Revistas |
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