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Laboratory investigation of engineering properties of rubberized asphalt mixtures containing reclaimed asphalt pavement

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Abstract:

An improved understanding of the rheological and engineering properties of a rubberized asphalt concrete (RAC) pavement that contains reclaimed asphalt pavement (RAP) is important to stimulating the use of these recycled and by-product materials in asphalt mixtures. The uses of RAP and rubberized asphalt in the past have proven to be economical, environmentally sound, and effective in hot mix asphalt (HMA) mixtures across the US and the world. The objective of this research was to investigate the binder and mixture performance characteristics of these modified asphalt mixtures through a series of laboratory tests to evaluate properties such as the fatigue factor G*sin, rutting resistance, resilient modulus, and fatigue life. The results of the experiments indicated that the use of RAP and crumb rubber in HMA can effectively improve the engineering properties of these mixes.

Il est important de mieux comprendre les propriétés rhéologiques et techniques d’une chaussée en béton bitumineux caoutchouté (RAC) qui contient un revêtement bitumineux récupéré (RAP) afin de simuler l’utilisation de ces matériaux recyclés et de ces sous-produits dans les mélanges bitumineux. Les utilisations du RAP et de l’asphalte caoutchouté dans le passé se sont montrées économiques, environnementales et efficaces dans les mélanges bitumineux chauds (HMA) aux États-Unis et ailleurs dans le monde. L’objectif de la présente recherche était d’étudier les caractéristiques du comportement du liant et du mélange ce ces mélanges bitumineux modifiés par une série d’essais en laboratoire, tels que G*sin, la résistance à la création d’ornières, le module de résilience et la durée de vie en fatigue. Les résultats des essais ont indiqué que l’utilisation de RAP et de caoutchouc granulaire dans les mélanges bitumineux chauds peut réellement améliorer les propriétés techniques de ces mélanges.

Document Type: Research Article

Publication date: November 1, 2010

More about this publication?
  • Published since 1974, this monthly publication is the official journal of the Canadian Society for Civil Engineering. It contains articles on environmental engineering, hydrotechnical engineering, structure engineering, construction engineering, engineering mechanics, and engineering materials, and a history of civil engineering. Contributors include recognized researchers and practitioners in industry, government, and academe. New developments in engineering design and construction are also featured.
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