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Ingeniare. Revista chilena de ingeniería

versión On-line ISSN 0718-3305

Resumen

VALDES V, Gonzalo A; PEREZ-JIMENEZ, Félix E  y  BOTELLA N, Ramón. New procedure to assess the fatigue behavior in asphalt pavements by Fénix test. Ingeniare. Rev. chil. ing. [online]. 2013, vol.21, n.3, pp.362-371. ISSN 0718-3305.  http://dx.doi.org/10.4067/S0718-33052013000300006.

This article presents an experimental study and its application in a methodology to evaluate the fatigue behavior of asphalt mixtures in pavement structures. This methodology and its application are based on the correlations obtained between stiffness and deformation parameters of a simple new fracture test, named Fénix test, and those obtained by the fatigue laws determined by the three point bending beam fatigue test, which complies with the European standard UNE-EN 12697-24. Four different Spanish asphalt mixture gradations were used, named G-20, S-20, S-20R60 and S-12R40, respectively. Two were also based on standard gradations but had a different percentage of Recycled Asphalt Pavement, RAP (S-20R60 and S-12R40 with 60% and 40% of RAP, respectively). Two mixtures, G-20 and S-20, were manufactured with penetration binders B60/70 and B13/22. Test temperatures were 5 °C and 20 °C. The binders of S-20R60 and S-12R40 mixtures had penetrations of250 and 200 dmm, respectively. Mixtures test temperature was 20 °C. The main conclusion obtained from this research was that the proposed methodology allows evaluating the fatigue life of a pavement structure through a simple procedure. At the same time, this study attempts to solve the problems presented by the fatigue testing of asphalt mixtures due to their complexity and the time required.

Palabras clave : Asphalt mixture; cracking; direct tensile test; fatigue; Fénix test.

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