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Evaluación de los beneficios de la captura de CO2 para el tratamiento de agregados finos reciclados de concreto, como una estrategia para combatir el cambio climático

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Evaluación de los beneficios de la captura de CO2 para el tratamiento de agregados finos reciclados de concreto, como una estrategia para combatir el cambio climático.pdf (2.82 MB)
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Molano Camargo, Marfa Carolina
Torres Castellanos, Nancy
Molano Camargo, Cindy Natalia
Abstract (Spanish)
Considerar los desechos de la industria de la construcción como fuente de recursos para producir materiales de construcción con baja huella de carbono, a partir de escombros derivados de las actividades de demolición del concreto y a través de la innovadora tecnología de captura y almacenamiento de dióxido de carbono (CAD), por medio de carbonatación acelerada, es un novedoso enfoque para contribuir al cerramiento del ciclo del carbono en los materiales de construcción, aportando al desarrollo sostenible y resiliente de la región. En este artículo se presentan los resultados experimentales de la evaluación a corto plazo de algunas propiedades físicas y de durabilidad de muestras de mortero elaboradas con agregados finos reciclados de concreto (AR), expuestos a carbonatación acelerada. Se realizaron mezclas de mortero, con diferentes porcentajes de remplazo de arena natural por ARSC (agregado fino reciclado sin carbonatar) y ARC (agregado fino reciclado carbonatado) en porcentajes del 0, 25, 50 y 100 %. Aunque las mezclas de mortero elaboradas con ARC registraron unos valores de propiedades mecánicas y de durabilidad inferiores a la muestra control (100 % arena natural), las mezclas de mortero elaboradas con ARC presentaron mejor desempeño en todas las propiedades, en comparación con las mezclas de mortero elaboradas con ARSC. Esto demostró la factibilidad de aplicar la tecnología CAD como un proceso para mejorar las propiedades de los agregados reciclados, a la vez que se combate el cambio climático. La mezcla de mortero elaborada con agregados finos reciclados, que obtuvo los mejores resultados, correspondió a 25 % ARC.
Abstract (English)
Considering the construction industry’s waste as a source to manufacture construction materials with a low carbon footprint, using debris derived from concrete demolition activities and through the innovative technology of carbon capture and storage (CCS), through accelerated carbonation, is a breakthrough approach to help to close the carbon cycle in construction materials, supporting a sustainable and resilient development in the region. This paper presents the experimental results of a short-term assessment of some of the physical and durability properties of mortar tests done with fine recycled concrete aggregates (RCA) exposed to accelerated carbonation. Mortar mixtures were prepared with different percentages of natural sand replacement by un-carbonated RCA and carbonated RCA in percentages of 0, 25, 50, and 100. Even though the mortar mixtures prepared with carbonated RCA registered lower values in their mechanical and physical properties than the control sample (100% natural sand), the mixtures prepared with carbonated RCA showed a better performance in all properties than mortar mixtures prepared with un-carbonated RCA. This showed the feasibility of applying CCS technology as a process to improve the properties of recycled aggregates, as well as fighting climate change. The mortar mixture prepared with fine recycled aggregates that showed the best results was 25% carbonated RCA
Extent
14 páginas
URI: https://repositorio.escuelaing.edu.co/handle/001/2531
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AM - Grupo de Investigación en Estructuras y Materiales
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