Resumen

GONZALEZ-CRUZ, Jacobo; PEREZ-REA, María de la Luz; HERNANDEZ-PADRON, Genoveva  y  CASTELLANOS-CORDERO, Alejandro. Balanced design of hot mix asphalt with reclaimed pavement (RAP) and virgin aggregate. Ing. invest. y tecnol. [online]. 2024, vol.25, n.1, e-2071.  Epub 07-Abr-2025. ISSN 2594-0732.  https://doi.org/10.22201/fi.25940732e.2024.25.1.008.

Currently, techniques and procedures are being developed to achieve asphalt mix designs capable of withstanding high levels of traffic by improving pavement performance, so the objective of this study is to achieve a mix that meets the specifications of cracking and permanent deformation using a smaller amount of asphalt cement, The objective of this study is to achieve a mix that meets the specifications for cracking and permanent deformation using less asphalt cement, in addition to using a greater amount of reclaimed asphalt pavement (RAP) by implementing a new methodology called Balanced Asphalt Mix Design (BMD), which among its requirements evaluates the performance of the mix in terms of permanent deformation (Hamburg Loaded Wheel) and indirect stress cracking (IDEAL-CT), giving a parameter of the maximum and minimum percentage of asphalt content that could be used in the mix. For this purpose, three mixes were tested with different asphalt percentages, the first with the optimum (5 %) obtained by Superpave volumetric analysis, the second with a lower amount of asphalt (4.5 %) and the third with a higher percentage (5.5 %), resulting in an acceptable asphalt range between 4.8 % and 4.95 %, complying with the evaluated parameters. In addition, four mixes were tested combined with 30 % RAP and with different percentages of asphalt, the first with the optimum (4.65 %), the next three with higher percentages (5.15 %, 5.65 % and 6.15 %). However, the results of the indirect stress cracking test were slightly below the recommended minimum. It is worth mentioning that no rejuvenating additive was added to the mixes combined with RAP; only PG 64-22-H asphalt was used. It is important to mention that, for the virgin design, it was possible to reduce the percentage of acceptable asphalt with respect to that obtained in the volumetric analysis, contributing to the optimization of the monetary cost in the use of asphalt cements and in the emissions of contaminating agents.

Palabras llave : Balanced design; superpave; RAP; IDEAL-CT; CT-Index.

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