Publicación: Investigación experimental sobre polvo de mármol y metacaolín como reemplazo parcial del cemento en mortero autocompactante
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2024-10-22
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info:eu-repo/semantics/openAccess
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Universidad Nacional de Educación a Distancia (España), Universidad de Concepción - Chile. Departamento de Ingeniería Mecánica
Resumen
En los últimos años, ha habido un aumento significativo en la producción mundial de cemento, lo que lo convierte en el tercer mayor contribuyente a las emisiones de dióxido de carbono. El uso de un nuevo aditivo con cementos binarios y ternarios minimiza las emisiones de CO2. En este estudio, se prueban el polvo de mármol (MP) y el metacaolín (MK) como cemento parcial y agregado fino. Como alternativa al cemento, este estudio utilizó polvo de mármol y metacaolín para hacer una variedad de mezclas de mortero autocompactante (SCM). La relación metacaolín a cemento es del 10% y los agregados finos se reemplazan con un 5% a 25% de polvo de mármol en comparación con el hormigón de la muestra de control. Se evalúa la trabajabilidad y la densidad del hormigón recién preparado para determinar su calidad. Examinamos las propiedades mecánicas de la muestra y realizamos pruebas mecánicas, así como pruebas de absorción de agua y sorptividad de acuerdo con las normas ASTM para evaluar las propiedades del hormigón. Al sustituir el cemento por metacaolín y polvo de mármol en las mezclas de hormigón, se descubrió que la densidad fresca aumentó mientras que la trabajabilidad disminuyó. Las propiedades mecánicas del hormigón se mejoran sustituyendo el cemento y las partículas finas por polvo de mármol y metacaolín. La sustitución del cemento por metacaolín y de los áridos finos por polvo de mármol dio lugar a una disminución de la sorptividad y de la absorción de agua. Las cualidades mecánicas y de durabilidad se mejoraron en la mezcla ideal que se realizó sustituyendo el 10% del metacaolín en lugar del cemento y el 20% del polvo de mármol por áridos finos. Estos resultados sugieren que el uso de MK y MP junto con el cemento como sustituto parcial podría reducir las emisiones de CO2 generadas por la industria del cemento.
In recent years, there has been a significant surge in global cement output making it the third largest contributor to carbon dioxide emissions. Using a new additive with binary and ternary cements minimises CO2 emissions. In this study marble powder (MP) and metakaolin (MK) are tested as partial cement and fine aggregate. As an alternative to cement this study used marble powder and metakaolin to make a variety of self-compacting mortar (SCM) mixtures. Metakaolin to cement ratio is 10% and fine aggregates are replaced with 5% to 25% marble dust compared to the control specimen concrete. Workability and density of the freshly prepared concrete is assessed to determine its quality. We examined the specimen's mechanical properties and conducted mechanical tests, as well as water absorption and sorptivity tests in accordance with ASTM standards to assess the concrete's properties. By substituting metakaolin and marble powder for cement in the concrete mixes it is found that the fresh density increased while the workability decreased. The mechanical properties of concrete are enhanced by substituting cement and fine particles with marble powder and metakaolin. Replacing cement with metakaolin and fine aggregates with marble powder resulted in a decrease in sorptivity and water absorption. The mechanical and durability qualities were improved in the ideal mixture that was made by replacing 10% of the metakaolin instead of cement and 20% of the marble powder with fine aggregates. These results suggest that using MK and MP together with cement as a partial substitute could reduce CO2 emissions generated by the cement industry.
In recent years, there has been a significant surge in global cement output making it the third largest contributor to carbon dioxide emissions. Using a new additive with binary and ternary cements minimises CO2 emissions. In this study marble powder (MP) and metakaolin (MK) are tested as partial cement and fine aggregate. As an alternative to cement this study used marble powder and metakaolin to make a variety of self-compacting mortar (SCM) mixtures. Metakaolin to cement ratio is 10% and fine aggregates are replaced with 5% to 25% marble dust compared to the control specimen concrete. Workability and density of the freshly prepared concrete is assessed to determine its quality. We examined the specimen's mechanical properties and conducted mechanical tests, as well as water absorption and sorptivity tests in accordance with ASTM standards to assess the concrete's properties. By substituting metakaolin and marble powder for cement in the concrete mixes it is found that the fresh density increased while the workability decreased. The mechanical properties of concrete are enhanced by substituting cement and fine particles with marble powder and metakaolin. Replacing cement with metakaolin and fine aggregates with marble powder resulted in a decrease in sorptivity and water absorption. The mechanical and durability qualities were improved in the ideal mixture that was made by replacing 10% of the metakaolin instead of cement and 20% of the marble powder with fine aggregates. These results suggest that using MK and MP together with cement as a partial substitute could reduce CO2 emissions generated by the cement industry.
Descripción
Organizado y patrocinado por: Federación iberoamericana de Ingeniería Mecánica y 'Universidad de Concepción - Chile. Departamento de Mecánica', FeIbIm – FeIbEM
Categorías UNESCO
Palabras clave
Polvo de mármol, metacaolín, hormigón, resistencia mecánica, Marble Powder, Metakaolin, Concrete, Mechanical Strength
Citación
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Centro
E.T.S. de Ingenieros Industriales
Departamento
Mecánica