Maximizing the use of recycled aggregates from combined thermal/mechanical and accelerated carbonation treatment
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Título: | Maximizing the use of recycled aggregates from combined thermal/mechanical and accelerated carbonation treatment |
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Autor/es: | Wenzel, Bruno | Letelier, Viviana | Zambrano, Gonzalo | Bustamante, Marion | Ortega, José Marcos |
Grupo/s de investigación o GITE: | Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ingeniería Civil |
Palabras clave: | Recycled aggregates | Concrete | Thermal/mechanical treatment | Accelerated carbonation |
Fecha de publicación: | 29-dic-2023 |
Editor: | Elsevier |
Cita bibliográfica: | Developments in the Built Environment. 2024, 17: 100316. https://doi.org/10.1016/j.dibe.2023.100316 |
Resumen: | The global emphasis on using recycled concrete aggregates (RCA) to reduce the depletion of natural resources has grown significantly. However, the presence of adhered mortar limits their usage in concrete to the coarse fraction and at low replacement rates, as complete replacement remains a challenge. This study aims to improve concrete with low-quality recycled aggregates through thermal/mechanical treatment combined with accelerated carbonation. Physical, chemical and mechanical properties of concretes with 100% coarse and fine RCA were evaluated. Results revealed that after the combined treatment the water absorption of coarse and fine RCA decreased by 18% and 6%, respectively. SEM images showed the precipitation of calcite with better crystallinity, resulting in a denser cement matrix, although water absorption and porosity were slightly improved. Furthermore, compressive and flexural strength of treated concrete achieved 91% and 96% of the control series, considering full RCA replacement and a higher w/c ratio. |
Patrocinador/es: | This work was partially supported by Universidad de La Frontera (Chile) under Projects DI18-0023 and DI19-0019. |
URI: | http://hdl.handle.net/10045/139590 |
ISSN: | 2666-1659 |
DOI: | 10.1016/j.dibe.2023.100316 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2024 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.dibe.2023.100316 |
Aparece en las colecciones: | INV - DMCIA - Artículos de Revistas |
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Wenzel_etal_2024_DevelopBuiltEnviron.pdf | 9,63 MB | Adobe PDF | Abrir Vista previa | |
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