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== Abstract ==
 
== Abstract ==
  
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En el presente artículo se presenta una nueva metodología para la caracterización mecánica de mezclas asfálticas con particular interés en las mezclas recicladas, lo que se traduce en la definición de ensayos de laboratorio idóneos y la formulación de un nuevo modelo constitutivo capaz de integrar las propiedades mecánicas del material y reproducir su respuesta en un contexto complejo. La adición de material asfáltico reciclado sobre una mezcla convencional, varía notablemente las propiedades de dicha mezcla. El diseño de mezclas asfálticas recicladas requiere información adicional a la proporcionada por los ensayos habitualmente empleados en el diseño de mezclas convencionales, para medir le evolución de propiedades como la tenacidad o la resistencia a la fisuración, determinantes en el comportamiento de la mezcla reciclada. Para este supuesto e propone el ensayo de tracción directa como referente experimental para la caracterización del material. Se ha formulado un modelo constitutivo en el cual se considera de forma explícita la influencia de la velocidad de deformación del material en la simulación de la respuesta del mismo. El ensayo de tracción directa permite calibrar los parámetros del modelo y por tanto caracterizar su respuesta estructural. Como objetivo final del proceso, se aplica el modelo propuesto para la simulación de la respuesta del material aasfáltico reciclado en una estructura de firme carretera, obteniendo resultados que reproducen la medida experimental con notable aproximación. Summary In this article a new methodology is presented for the mechanical characterization of the asphalt mixes, specially the recycled asphalt mixes, which leads to define the adequate laboratory tests and to formulate a new constitutive model able to integrate the mechanical properties and reproduce the response of the material in a more complex context. The addition of asphaltic recycled material over a conventional mix, change in a significant way the properties of this mix. The design of recycled asphalt mixes requires additional information far away the properties of this mix. The design of recycled asphalt mixes requires additional information far away from the usual test used in the design of conventional mixes, to pick up the evolution of the tenacity of the cracking resistance, determinant variables in the recycled asphalt mix’s behavior. For thid purpose, the direct tensile test in proposed as the experimental reference for the characterization of the material. A new constitutive model in formulated considering in a explicit shape, the influence of the strain shape, the influence of the strain rate of the material in the simulation of its response. The direct tensile test is used to calibrate the parameters of the model, and so characterize its structural response. The main objective of this development is the simulation of the behavior of the recycled asphalt mixture in a fleexible pavement. The results obtained reach a good approximation to the experimental measures with the proposed model.
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In this article a new methodology is presented for the mechanical characterization of the asphalt mixes, specially the recycled asphalt mixes, which leads to define the adequate laboratory tests and to formulate a new constitutive model able to integrate the mechanical properties and reproduce the response of the material in a more complex context. The addition of asphaltic recycled material over a conventional mix, change in a significant way the properties of this mix. The design of recycled asphalt mixes requires additional information far away the properties of this mix. The design of recycled asphalt mixes requires additional information far away from the usual test used in the design of conventional mixes, to pick up the evolution of the tenacity of the cracking resistance, determinant variables in the recycled asphalt mix’s behavior. For thid purpose, the direct tensile test in proposed as the experimental reference for the characterization of the material. A new constitutive model in formulated considering in a explicit shape, the influence of the strain shape, the influence of the strain rate of the material in the simulation of its response. The direct tensile test is used to calibrate the parameters of the model, and so characterize its structural response. The main objective of this development is the simulation of the behavior of the recycled asphalt mixture in a fleexible pavement. The results obtained reach a good approximation to the experimental measures with the proposed model.
  
 
== Full document ==
 
== Full document ==
 
<pdf>Media:draft_Content_713675521RR272E.pdf</pdf>
 
<pdf>Media:draft_Content_713675521RR272E.pdf</pdf>

Latest revision as of 12:08, 14 June 2017

Abstract

In this article a new methodology is presented for the mechanical characterization of the asphalt mixes, specially the recycled asphalt mixes, which leads to define the adequate laboratory tests and to formulate a new constitutive model able to integrate the mechanical properties and reproduce the response of the material in a more complex context. The addition of asphaltic recycled material over a conventional mix, change in a significant way the properties of this mix. The design of recycled asphalt mixes requires additional information far away the properties of this mix. The design of recycled asphalt mixes requires additional information far away from the usual test used in the design of conventional mixes, to pick up the evolution of the tenacity of the cracking resistance, determinant variables in the recycled asphalt mix’s behavior. For thid purpose, the direct tensile test in proposed as the experimental reference for the characterization of the material. A new constitutive model in formulated considering in a explicit shape, the influence of the strain shape, the influence of the strain rate of the material in the simulation of its response. The direct tensile test is used to calibrate the parameters of the model, and so characterize its structural response. The main objective of this development is the simulation of the behavior of the recycled asphalt mixture in a fleexible pavement. The results obtained reach a good approximation to the experimental measures with the proposed model.

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Published on 01/04/11
Accepted on 26/05/17
Submitted on 26/05/17

Volume 27, Issue 2, 2011
Licence: CC BY-NC-SA license

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