Especificaciones de cálculo de la vida útil y estado límite de corrosión

C. Andrade

Abstract


RESUMEN

Los cálculos de vida útil de las estructuras de hormigón están pasando rápidamente de los laboratorios a las normativas y a ser especificados en la licitación de grandes infraestructuras. Así vidas útiles de 100 años o más se han requerido en puentes como Oresund o en el nuevo canal de Panamá. Sin embargo la especificación se realiza de forma resumida sin que se defina la forma de demostrar esa durabilidad y en algunos casos, sin siquiera mencionar los ensayos y sus valores limites que se deben utilizar. En la presente comunicación se describen los aspectos más importantes que se deben especificar en los modelos que deben ser además de los coeficientes de difusión, la concentración superficial, los factores de envejecimiento y el límite de cloruros así como la probabilidad de corrosión que se considera inaceptable.

Palabras Clave: hormigón; cloruros; resistividad; difusión.


ABSTRACT

Estimates of service life of concrete structures are rapidly moving from laboratories to the standards and to be specified in the construction for large infrastructures. So service life of 100 years or more were required to Oresund bridge or the new Panama Canal. However, the specification is made without defining how to prove the specified durability and in some cases, without even mentioning the tests and limit values to be used. Present communication describes the most important aspects to be specified in the chloride prediction models in addition to the diffusion coefficients, which are the surface concentration, the aging factor, the limit of chlorides and the acceptable probability of corrosion.

Keywords: concrete; chlorides; resistivity; diffusion.


Keywords


hormigón; cloruros; resistividad; difusión

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References


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DOI: http://dx.doi.org/10.21041/ra.v3i2.45

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