Asfaltos altamente modificados con polvo de NFU en mezclas asfálticas retardantes de la fisuración refleja
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Date
2019
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Universidad Tecnológica Nacional Regional Córdoba.
Abstract
El deterioro prematuro de las capas retardantes de las fisuras reflejas, ocasiona reiteradas tareas de mantenimiento en las capas de rehabilitación colocadas sobre ellas, generando incrementos en los costos de conservación de los pavimentos. En búsqueda de mejorar esta situación, se han interpuesto geogrillas y geosintéticos en dichas capas, implicando mayores costos, que en algunos proyectos, puede resultar prohibitivo. Se genera así la necesidad de mejorar las capas arena – asfalto normalmente utilizadas en estas tareas, como una de las alternativas más competitivas. Es por ello que se plantea como hipótesis que las capas arena – asfalto con alto contenido de polvo de neumáticos fuera de uso (NFU) presentarán mejores características elásticas y resistencia a fatiga, en conjunto con la capa de rehabilitación colocada por encima, dando por resultado una mayor vida útil del sistema. Por esto el objetivo planteado es estudiar la respuesta bajo solicitación dinámica de mezclas asfálticas retardantes de la fisuración refleja elaboradas con asfaltos fuertemente modificado con polvo de NFU y su comparación con sistemas convencionales.
The premature deterioration of the retarding layers of the reflected fissures causes repeated maintenance tasks in the rehabilitation layers placed on them, generating increases in the costs of pavement conservation. In search of improving this situation, geogriilas and geosynthetics have been interposed in these layers, implying higher costs, than in some projects, it can be prohibitive. This creates the need to improve the sand - asphalt layers normally used in these tasks, as one of the most competitive alternatives. That is why it is hypothesized that the sand - asphalt layers with high dust content of out-of-use tires (NFU) will have better elastic characteristics and fatigue resistance, together with the rehabilitation layer placed above, resulting in longer system life For this reason, the objective is to study the response on dynamic request of asphalt mixtures retarding the cracking reflex elaborated with asphalts strongly modified with NFU powder and its comparison with conventional systems.
The premature deterioration of the retarding layers of the reflected fissures causes repeated maintenance tasks in the rehabilitation layers placed on them, generating increases in the costs of pavement conservation. In search of improving this situation, geogriilas and geosynthetics have been interposed in these layers, implying higher costs, than in some projects, it can be prohibitive. This creates the need to improve the sand - asphalt layers normally used in these tasks, as one of the most competitive alternatives. That is why it is hypothesized that the sand - asphalt layers with high dust content of out-of-use tires (NFU) will have better elastic characteristics and fatigue resistance, together with the rehabilitation layer placed above, resulting in longer system life For this reason, the objective is to study the response on dynamic request of asphalt mixtures retarding the cracking reflex elaborated with asphalts strongly modified with NFU powder and its comparison with conventional systems.
Description
Keywords
Asfalto, Neumátic, Reología, Fisuración Refleja
Citation
Tecnología y Ciencia- UTN
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Except where otherwised noted, this item's license is described as info:eu-repo/semantics/openAccess

