Abstract

PAREDES CHERREZ, Luis Alberto; REYES ORTIZ, Óscar Javier  and  CAMACHO TAUTA, Javier Fernando. Behavior of dense asphalt mixtures by the simply supported semicircular beam. Tecnura [online]. 2014, vol.18, n.41, pp.103-119. ISSN 0123-921X.

Mechanic characterization of asphalt mixtures uses to be expensive and time consuming. How-ever, some researches try to correlate such properties by simple, fast and less expensive tests. The main goal of this investigation consisted into establish the viability of use the simply supported semicircular beam (SCB) to characterize dense asphalt mixtures designed under specifications of the Instituto de Desarrollo Urbano (IDU) and the Instituto Nacional de Vías (In-vias). The study started with the production of SCB specimens using different materials (soil aggregate, asphalt, asphaltite, reclaimed asphalt pavement and lime) and compaction techniques (vibration and gyratory compaction). The SCB tests were carried at a velocity of lmm/min and 15°C of temperature. From these tests, different parameters were obtained based on the definition in the Fénix test (maximum load, displacement at maximum loading, energy released during the cracking process, traction stiffness index and tenacity index). From the results, it was found that the SCB tests were useful as a tool to characterize the mechanical properties of the asphalt mixtures. This conclusion is applicable for all kind of mixtures tested, ageing periods, compaction level and filler content.

Keywords : Asphaltite; asphalt; energy dissipation; Fénix test; SCB test; RAP.

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