ANÁLISIS DE AFECTACIONES POR CORROSIÓN ATMOSFÉRICA EN ESTRUCTURAS DE HORMIGÓN ARMADO EN UNA ZONA COSTERA DE MANTA, MANABÍ ECUADOR.

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Bibliographic Details
Title:	ANÁLISIS DE AFECTACIONES POR CORROSIÓN ATMOSFÉRICA EN ESTRUCTURAS DE HORMIGÓN ARMADO EN UNA ZONA COSTERA DE MANTA, MANABÍ ECUADOR.
Alternate Title:	ANALYSIS OF EFFECTS BY ATMOSPHERIC CORROSION ON REINFORCED CONCRETE STRUCTURES IN A COASTAL ZONE OF MANTA, MANABÍ ECUADOR.
Authors:	Moreira Basurto, Fabián Eudoro¹, Guerra Mera, Juan Carlos¹ juan.guerra@utm.edu.ec
Source:	Revista CENIC Ciencias Quimicas. 2024, Vol. 55, p87-100. 14p.
Subjects:	CONCRETE construction, REINFORCING bars, REINFORCED concrete, SERVICE life, LINEAR statistical models
Abstract (English):	The insufficient performance of diagnostic studies on reinforced concrete structures aimed at analyzing the effects by atmospheric corrosion on reinforcement steels is a reality in along the entire coastal coast of Ecuador. As a preliminary experience for the solut ion of this current problem in civil engineering, eight reinforced concrete structures located at different distances from the coastline were sel ected in a zone of Manta canton, province of Manabí, Ecuador. To evaluate the effects of atmospheric corrosion in the structures was the main objective of the study was. Apparent Resistivity measurements that allowed obtaining the Corrosion Current Intensity as an indicator of atmospheric corrosion in reinforcement steels, as well as the Compressive Strength estimated from Sclerometry, were carried out in a column in the eight selected structures. The estimation of the service life of the structures was possible. The results obtained showed that five structures are at their ultimate or residual service life and one at its design service life. Only two of them could be found in their project service life while maintaining their initial conditions of aesthetics, functionality and safety against to the impact of the aggressive coastal environment of the atmosphere prevailing in the study zone. This experience can be acquired along the entire coastline of Ecuador. The good fit of statistical models based on linear and exponential increasing regressions, as well as multiple linear regressions, allowed to demonstrate as specific objectives of the study, the influence of Compressive Strength on Electrical Resistivity, and of both parameters on Corrosion Current Intensity respectively. It was confirmed that Electrical Resistivity, besides defining the risk of atmospheric corrosion in construction elements, is a necessary and sufficient parameter to be used in diagnostic studies. The visual observation in a column that presented serious effects due to atmospheric corrosion in the reinforcement steels in one of the eight selected structures, allowed the confirmation of the results. [ABSTRACT FROM AUTHOR]
Abstract (Spanish):	La insuficiente ejecución de estudios de diagnóstico en estructuras de hormigón armado, destinados al análisis de afectaciones producidas por la corrosión atmosférica en los aceros de refuerzo, es una realidad existente en todo el litoral costero del Ecuador. Como una experiencia preliminar para la solución de esta problemática actual en la ingeniería civil, ocho estructuras de hormigón armado emplazadas a diferentes distancias desde la línea costera fueron seleccionadas en una zona del cantón de Manta, provincia de Manabí, Ecuador. Evaluar las afectaciones por corrosión atmosférica en las estructuras fue el objetivo general del estudio. Mediciones de Resistividad Aparente que permitieron la obtención de la Intensidad de Corriente de Corrosión como un indicador de la corrosión atmosférica en los aceros de refuerzo, así como de la Resistencia a la compresión estimada de la Esclerometría, fueron real izadas en una columna en ocho estructuras seleccionadas. La estimación del tiempo de vida útil en las estructuras fue posible. Los resultados obtenidos permitieron demostrar, que cinco estructuras se encontraron en sus tiempos de vida útil última o residual y una en su tiempo de vida útil de diseño. Solamente dos, pudieron encontrarse en su tiempo de vida útil de proyecto manteniendo sus condiciones iniciales de estética, funcionalidad y seguridad frente al impacto del ambiente agresivo costero de la atmósfera predominante en la zona de estudio. Esta experiencia puede ser adquirida en todo el litoral costero del Ecuador. El buen ajuste de modelos estadísticos basados en regresiones lineales y exponenciales crecientes, así como regresiones lineales múltiples, permitió demostrar como objetivos específicos del estudio, la influencia de la Resistencia a la Compresión en la Resistividad Aparente y la de ambos parámetros en la Intensidad de Corriente de Corrosión respectivamente. Se confirmó, que la Resistividad Aparente, además de definir el riesgo por corrosión atmosférica en elementos constructivos, es un parámetro necesario y suficiente para ser usado en los estudios de diagnóstico. La observación visual en una columna que presentó serias afectaciones debido a la corrosión atmosférica en los aceros de refuerzo de las ocho estructuras seleccionadas, permitió la confirmación de los resultados. [ABSTRACT FROM AUTHOR]
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Database:	MedicLatina

Description
Abstract:	The insufficient performance of diagnostic studies on reinforced concrete structures aimed at analyzing the effects by atmospheric corrosion on reinforcement steels is a reality in along the entire coastal coast of Ecuador. As a preliminary experience for the solut ion of this current problem in civil engineering, eight reinforced concrete structures located at different distances from the coastline were sel ected in a zone of Manta canton, province of Manabí, Ecuador. To evaluate the effects of atmospheric corrosion in the structures was the main objective of the study was. Apparent Resistivity measurements that allowed obtaining the Corrosion Current Intensity as an indicator of atmospheric corrosion in reinforcement steels, as well as the Compressive Strength estimated from Sclerometry, were carried out in a column in the eight selected structures. The estimation of the service life of the structures was possible. The results obtained showed that five structures are at their ultimate or residual service life and one at its design service life. Only two of them could be found in their project service life while maintaining their initial conditions of aesthetics, functionality and safety against to the impact of the aggressive coastal environment of the atmosphere prevailing in the study zone. This experience can be acquired along the entire coastline of Ecuador. The good fit of statistical models based on linear and exponential increasing regressions, as well as multiple linear regressions, allowed to demonstrate as specific objectives of the study, the influence of Compressive Strength on Electrical Resistivity, and of both parameters on Corrosion Current Intensity respectively. It was confirmed that Electrical Resistivity, besides defining the risk of atmospheric corrosion in construction elements, is a necessary and sufficient parameter to be used in diagnostic studies. The visual observation in a column that presented serious effects due to atmospheric corrosion in the reinforcement steels in one of the eight selected structures, allowed the confirmation of the results. [ABSTRACT FROM AUTHOR]
ISSN:	10158553