Published

2017-01-01

Mechanical characterization of porous asphalt mixes modified with fatty acid amides -FAA-

Caracterización mecánica de mezclas asfálticas porosas modificadas con amidas de ácidos grasos

Keywords:

modified asphalt, porous asphalt mixes, hot asphalt mixes, hydroplaning, fatty acid amides, Cantabro test (en)
Cemento asfáltico modificado, mezclas asfálticas porosas, mezclas asfálticas en caliente, hidroplaneo, amidas de ácidos grasos, ensayo Cántabro (es)

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Porous asphalt mixes (PAM), form a special road surface for asphalt pavement structures, have a special particle size distribution that lets infiltrate to the runoff storm water through of it because of its voids content about 20 %. Many researchers conducted studies and have concluded that the use of modified asphalts is completely necessary to design PAM. Organic and chemical additives and special procedures as foamed asphalt have enhanced the performance of PAM, during their service life. This paper is focused on the mechanical characterization of PAM and how the asphalt modified with fatty acid amides, influenced on their behavior and performance. Based on an experimental methodology with laboratory tests aimed at establishing a comparison between porous asphalt mixes, using for its design and production a penetration 60-70 pure asphalt and another one asphalt modified with fatty acid amides.

Las mezclas asfálticas porosas (PAM), conforman una superficie de rodadura especial para los pavimentos flexibles. Tienen una granulometría característica, lo cual permite la infiltración de las aguas de escorrentía pluvial, gracias al contenido de vacíos que posee, alrededor del 20 %. Muchos investigadores han realizado estudios que han permitido concluir que el uso de asfaltos modificados es completamente necesario para diseñar las PAM. Aditivos químicos y orgánicos y procesos especiales tales como el de asfalto espumado y la inclusión de fibras en el diseño de la mezcla, han mejorado el comportamiento de las PAM, durante su periodo de servicio. El presente artículo aborda la temática de la caracterización mecánica de mezclas asfálticas porosas (PAM) y hace énfasis en cómo el cemento asfáltico modificado con amidas de ácidos grasos, influye en su comportamiento y desempeño. Esta investigación, basada en una metodología experimental a través de ensayos de laboratorio, estableció una comparación entre las mezclas asfálticas porosas, empleando para su diseño y producción una, con asfalto puro de penetración 60-70 en 1/10 mm a 25 °C y otra, cuyo asfalto está modificado con amidas de ácidos grasos.

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