Evaluación del diseño concreto autocompactable cemento – arena, utilizando agregado fino del cauce fluvial (río amazonas) y aditivo de alto rango, Iquitos – 2024
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Date
2024-12-16
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Universidad Científica del Perú
Abstract
La industria de la construcción se enfrenta a desafíos específicos en su búsqueda de la calidad total debido a su complejidad y dinamismo inherentes, lo que le distingue de la industria manufacturera, donde la estandarización y control de procesos son más factibles. El concreto autocompactante es una solución innovadora que combina trabajabilidad, productividad y calidad. Por consiguiente, en la investigación realizada se busca determinar un concreto autocompactable cemento – arena, con agregado fino del cauce fluvial y aditivo de alto rango que cumpla con las resistencias requeridas en estado endurecido. El problema general de la investigación se centra en, ¿Cómo influye el uso del agregado fino del cauce fluvial y aditivo de alto rango en el comportamiento del concreto autocompactable cemento – arena en Iquitos 2024?, teniendo como principal objetivo evaluar el diseño del concreto autocompactable cemento – arena, utilizando agregado fino del cauce fluvial (río amazonas) y aditivo de alto rango en estado fresco y endurecido en Iquitos, 2024. La investigación es de tipo exploratoria mientras que el diseño de investigación es de carácter experimental. La metodología utilizada consistió en realizar ensayos físicos en el agregado fino, diseñar mezclas de concreto patrón con relaciones a/c = 0.50 y 0.55. Y a partir de estas generar mezclas en su condición fluida que cumpla con los parámetros de extensibilidad de flujo y flujo de asentamiento. Se utilizaron porcentajes de aditivos de alto rango que van desde 0.75%, 1.00% y 1.25%. Finalmente se realizaron ensayos en estado fresco y endurecido, dando prioridad a los parámetros del concreto autocompactable.
El estudio revela que la resistencia a la compresión disminuye a medida que se incrementan las dosis de aditivo de alto rango (MasterRheobuild 1201), encontrándose la dosificación más óptima en 0.75% del peso del cemento, lo que produce un aumento significativo en la resistencia respecto al concreto patrón y a las otras dosificaciones de aditivo.
The construction industry faces specific challenges in its quest for total quality due to its inherent complexity and dynamism, which distinguishes it from the manufacturing industry, where standardization and process control are more feasible. Self-compacting concrete is an innovative solution that combines workability, productivity and quality. However, its internal complexity requires continuous research to understand its behaviour changes and ensure optimal performance at all stages of its useful life. Therefore, the research carried out seeks to determine a self-compacting cement-sand concrete, with fine aggregate from the riverbed and high-range additive that meets the required strengths in a hardened state. The general research problem focuses on, How does the use of fine aggregate from the riverbed and high-range additive influence the behavior of self-compacting cement-sand concrete in Iquitos 2024? having as main objective to evaluate the design of self-compacting cement-sand concrete, using fine aggregate from the riverbed (Amazon River) and high-range additive in fresh and hardened state in Iquitos, 2024. The research is exploratory while the research design is experimental. The methodology used consisted of performing physical tests on fine aggregate, designing standard concrete mixes with w/c ratios = 0.50 and 0.55. And from these, generating mixes in their fluid condition that meet the parameters of flow extensibility and slump flow. High-range additive percentages were used ranging from 0.75%, 1.00% and 1.25%. Finally, tests were carried out in the fresh and hardened state, giving priority to the parameters of self-compacting concrete. The study reveals that compressive strength decreases as the high-range additive dosage (MasterRheobuild 1201) increases, with the most optimal dosage being 0.75% of the cement weight, which produces a significant increase in strength compared to the standard concrete and the other additive dosages.
The construction industry faces specific challenges in its quest for total quality due to its inherent complexity and dynamism, which distinguishes it from the manufacturing industry, where standardization and process control are more feasible. Self-compacting concrete is an innovative solution that combines workability, productivity and quality. However, its internal complexity requires continuous research to understand its behaviour changes and ensure optimal performance at all stages of its useful life. Therefore, the research carried out seeks to determine a self-compacting cement-sand concrete, with fine aggregate from the riverbed and high-range additive that meets the required strengths in a hardened state. The general research problem focuses on, How does the use of fine aggregate from the riverbed and high-range additive influence the behavior of self-compacting cement-sand concrete in Iquitos 2024? having as main objective to evaluate the design of self-compacting cement-sand concrete, using fine aggregate from the riverbed (Amazon River) and high-range additive in fresh and hardened state in Iquitos, 2024. The research is exploratory while the research design is experimental. The methodology used consisted of performing physical tests on fine aggregate, designing standard concrete mixes with w/c ratios = 0.50 and 0.55. And from these, generating mixes in their fluid condition that meet the parameters of flow extensibility and slump flow. High-range additive percentages were used ranging from 0.75%, 1.00% and 1.25%. Finally, tests were carried out in the fresh and hardened state, giving priority to the parameters of self-compacting concrete. The study reveals that compressive strength decreases as the high-range additive dosage (MasterRheobuild 1201) increases, with the most optimal dosage being 0.75% of the cement weight, which produces a significant increase in strength compared to the standard concrete and the other additive dosages.
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Keywords
Concreto autocompactable, Agregado fino del cauce fluvial, Extensión de flujo (Dmáx), Flujo de asentamiento (T50), Aditivo de alto rango, Self-compacting concrete, Fine aggregate from the river channel, Flow extent (Dmax), Slump flow (T50), High-range admixture
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