Influence in the fracture resistance of HMA when varying recycled content and air voids

Reclaimed Asphalt Pavement (RAP) is a material that is milled of existing aged asphalt pavements. It is used as an alternative methodology to reduce the amount of energy required to produce Hot Mixed Asphalts (HMA), minimize pollutants and the use of natural resources like aggregates and crude oil. However, it exists a concern due to the variability of RAP mainly in the long-term pavement performance. For this reason, it is important to determine the fracture characteristics of asphalt mixtures and the influence of varying the air voids and the recycled content as these parameters vary the mechanical behavior of mixes. This paper consists on obtaining the cracking resistance in terms of fracture energy, peak load and fracture toughness when varying the air voids (4±1% AV and 8±1% AV) and the recycled content (0% and 30% RAP). To assess the effect of the recycled content and the air voids the samples were evaluated using SCB test. The results showed that mixes containing RAP had higher peak loads, fracture toughness and work of fracture for both AV content. However, regarding fracture energy, there was a notable difference on RAP mixes and control mixes due to the methodology used to obtain the ligament area

• Autores: Espitia Daza, Paula Andrea
• Tipo de recurso: Trabajo de grado de pregrado
• Fecha de publicación: 2017
• Institución: Universidad de los Andes
• Repositorio: Séneca: repositorio Uniandes
• Idioma: eng
• OAI Identifier: oai:repositorio.uniandes.edu.co:1992/39797
• Acceso en línea: http://hdl.handle.net/1992/39797
• Palabra clave: Reciclaje de pavimentos; Pavimentos de asfalto; Pavimentos; Ingeniería
• Rights: openAccess
• License: https://repositorio.uniandes.edu.co/static/pdf/aceptacion_uso_es.pdf