Abstract

ABRIL ZULETA, Sandra Lizeth; FERNANDEZ GOMEZ, Wilmar Darío  and  REYES LIZCANO, Fredy Alberto. Performance period of prefabricated asphalt mixtures stored for patching activities in Bogotá D.C. Cienc. Ing. Neogranad. [online]. 2022, vol.32, n.1, pp.25-41.  Epub June 03, 2022. ISSN 0124-8170.  https://doi.org/10.18359/rcin.5294.

The objective of this work is to determine the performance period of three prefabricated asphalt mixtures used for patching activities in flexible pavement. The materials were evaluated by granulometry tests, bulk specific gravity, and maximum specific gravity. The performance of the mixtures was evaluated through stability and flow tests, Cantabro and rutting tests, resilient modulus, trapezoidal fatigue and evaluation of susceptibility to water by indirect traction (TSR). According to the results for mixture I, the conclusion is that this material is not recommended for use, since it presented unfavorable performance during and after laboratory tests. For type II and III mixtures, the evaluation of the number of equivalent axes was determined using the French mechanistic empirical and AASTHO-93 methodologies. As a result of the modeling, it was evidenced that the mixtures supported low traffic classified between T1 and T2, with a performance period for the type II mixture between five and six months, and for the type III mixture between one and fifteen months. Results obtained according to the evaluated methodology. It was concluded that mixtures type II and III are adequate mixtures to carry out emergency interventions in road corridors that support low traffic.

Keywords : trapezoidal fatigue; precast mix; resilient module; flexible pavement patching.

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