Evaluación de mezclas de hormigón para el nuevo canal de Panamá mediante la medida de la resistividad y de la resistencia a la difusión de cloruros
Abstract
RESUMEN
El Canal de Panamá fue construido hace unos 100 años y en la actualidad el consorcio “Grupo Unidos por el Canal†(GUPC), coordinado por Sacyr S.A. está construyendo dos nuevas series de esclusas. El hormigón del antiguo Canal no estaba armado pero en el actual se prevé el uso de armadura como parte del diseño antisÃsmico. La Autoridad del Canal de Panamá (ACP), en su Pliego de condiciones definió una vida útil de 100 años para lo que especificó valores del método ASTM 1202 de menos de 1000 culombios y el cálculo de la vida útil mediante un programa. En el presente trabajo se detallan, para algunas de las mezclas diseñadas, los resultados obtenidos tanto de culombios como de resistividad y los coeficientes de difusión que se obtuvieron mediante difusión natural. Igualmente se muestran los resultados al introducir los valores en el método numérico de cálculo de vida útil LIFEPRED.
Palabras clave: hormigón; cloruros; resistividad; difusión.
ABSTRACT
The Panama Canal was built about 100 years ago and a two new sets of locks are being constructed by the consortium "Grupos Unidos por el Canal" (GUPC) which is coordinated by Sacyr S.A. The old Panama Canal was built without steel reinforcement but the new one considered reinforcement as part of the antiseismic design. The Panama Canal Authority (ACP), established a lifespan of 100 years, for which it specified values from the ASTM 1202 method lower than 1000 Coulombs and the estimation of the lifespan by means of a program. The results of both Coulombs resistivity and diffusion coefficients, obtained after natural diffusion, are discussed for some of the designed mixtures. The numerical calculations of service lifespan, as obtained by LIFEPRED method, are also shown.
Keywords: concrete; chlorides; resistivity; diffusion.
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References
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