Evaluación de normativas ACI 365.1R y EHE-08 para la predicción de vida útil por ataque de cloruros en edificios afectados por corrosión
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Date
2025-02-06
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Pontificia Universidad Católica del Perú
Abstract
Con el objetivo de evaluar la aplicabilidad de los modelos predictivos ACI 365.1R y
EHE-08, se llevó a cabo una campaña experimental en seis estructuras afectadas por
corrosión en las proximidades del litoral peruano. El estudio implicó la realización de
inspecciones visuales, auscultación de acero, ensayos de carbonatación, extracción
de especímenes diamantinos y muestreo de concreto triturado. Luego, se sometieron
las muestras a ensayos de resistencia a la compresión del concreto y obtención de
concentración de cloruros en las superficies de concreto. La información recopilada
se analizó en gabinete utilizando medidas de dispersión y métodos estadísticos. Los
resultados revelaron que el modelo europeo EHE-08 presenta una estimación de vida
útil menos conservadora, con una media de 44 años y el rango más amplio de
periodos, abarcando 66 años. Este modelo también exhibe la mayor dispersión entre
los casos estudiados, junto con el coeficiente de variación más bajo, con un valor del
22%. Por otro lado, el modelo americano ACI 365 muestra una vida útil más
conservadora, con una media de 16 años y el rango más reducido de valores, limitado
a 10 años. Este modelo presenta la menor dispersión y uno de los coeficientes de
variación más bajos, con un valor del 23%. Los análisis de correlación de Pearson y
el método ANOVA demostraron una notable similitud entre ambos modelos, reflejada
en la proximidad de los resultados. Sin embargo, el modelo europeo EHE-08 es más
directo en ejecución y forma. Por lo tanto, es la principal elección para este estudio.
In order to assess the applicability of the service life prediction models ACI 365.1R and EHE-08, an experimental campaign was conducted on six structures affected by corrosion in the vicinity of the Peruvian coastline. The study involved visual inspections, steel auscultation, carbonation tests, extraction of diamond core samples, and sampling of crushed concrete. Subsequently, the samples underwent compressive strength tests and chloride concentration determination on concrete surfaces. The collected information was analyzed using dispersion measures and statistical methods. The results revealed that the European model EHE-08 provides a less conservative estimate of service life, with an average of 44 years and the widest range of periods, spanning 66 years. This model also exhibited the greatest dispersion among the cases studied, coupled with the lowest coefficient of variation at 22%. On the other hand, the American model ACI 365 presented a more conservative service life estimate, with an average of 16 years and a narrower range of values, limited to 10 years. This model showed the least dispersion and one of the lowest coefficients of variation at 23%. Pearson correlation analyses and ANOVA demonstrated a notable similarity between both models, as reflected in the proximity of the results. However, the European model EHE-08 is more straightforward in execution and presentation. Therefore, it is the primary choice for this study.
In order to assess the applicability of the service life prediction models ACI 365.1R and EHE-08, an experimental campaign was conducted on six structures affected by corrosion in the vicinity of the Peruvian coastline. The study involved visual inspections, steel auscultation, carbonation tests, extraction of diamond core samples, and sampling of crushed concrete. Subsequently, the samples underwent compressive strength tests and chloride concentration determination on concrete surfaces. The collected information was analyzed using dispersion measures and statistical methods. The results revealed that the European model EHE-08 provides a less conservative estimate of service life, with an average of 44 years and the widest range of periods, spanning 66 years. This model also exhibited the greatest dispersion among the cases studied, coupled with the lowest coefficient of variation at 22%. On the other hand, the American model ACI 365 presented a more conservative service life estimate, with an average of 16 years and a narrower range of values, limited to 10 years. This model showed the least dispersion and one of the lowest coefficients of variation at 23%. Pearson correlation analyses and ANOVA demonstrated a notable similarity between both models, as reflected in the proximity of the results. However, the European model EHE-08 is more straightforward in execution and presentation. Therefore, it is the primary choice for this study.
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Resistencia de materiales, Corrosión marina, Análisis de datos de tiempo de falla
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