Development of a test method to determine the colour durability of coloured bituminous mixtures

Destrée, Alexandra; Piérard, Nathalie; Vanelstraete, A

doi:10.1080/14680629.2015.1029670

Cited by 8 publications

(3 citation statements)

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“…In this paper, the major findings related to the mechanical performance and mix design are reported. Other important issues such as the objective determination of the colour or its durability are discussed at length elsewhere (Denolf et al 2012;Destrée et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Coloured Asphalt Pavements: Mix Design and Laboratory Performance Testing

et al. 2015

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Coloured asphalt pavements are increasingly used in large public areas and at dangerous intersections such as crossroads, roundabouts or pedestrian crossings. In the former application, the role of the coloured pavement is often to give the space a particular aesthetic character or to integrate it well in its surroundings; in the latter, its major role is to enhance the safety of users by improving visibility and road legibility. However, coloured pavements are also subjected to traffic and climate-induced stresses and must, therefore, exhibit a similar mechanical performance as their uncoloured counterparts. Desired colours are obtained by using specific materials such as coloured aggregates, pigments and clear binders. However, the application of latter constituents may affect the performance and durability of coloured asphalt mixtures. Therefore, in a first step, BRRC (Belgian Road Research Centre) determined the characteristics of these particular materials such as the rheological behaviour of clear binders both at high and low temperatures and the stiffening effect of pigments acting as filler. Subsequently, the impact of the material characteristics on volumetric mix design was investigated. In a next phase their effect on the mechanical performance of coloured mixtures was studied in the laboratory. The latter performance was evaluated by testing for water sensitivity, rutting resistance and low-temperature cracking. This contribution summarizes the major findings from the study.

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Section: Introductionmentioning

confidence: 99%

Coloured Asphalt Pavements: Mix Design and Laboratory Performance Testing

et al. 2015

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“…A new awareness on environmental impact and driver safety has risen more and more interest in non-black asphalt pavements since the color of the road pavement helps in achieving numerous advantages. Indeed, the development of non-black asphalt mixtures may play a significant role to improve functional, aesthetical, and environmental issues for road pavements [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Non-black asphalt pavements can be obtained in several ways such as using colored aggregates and pigments to traditional bitumen or clear binders (or a combination of them) in surface treatments and in asphalt mixtures for surface layer [4]. However, after weathering and wearing, the color of aggregates becomes dominant in influencing the aesthetic and durability of pavement color [2]. erefore, the most effective and durable method appears to be the selection of aggregates, in terms of both physicochemical properties and color, and translucent binders, or so-called "clear binders."…”

Section: Introductionmentioning

confidence: 99%

Mechanical Characterization and Chemical Identification of Clear Binders for Road Surface Courses

Grilli

Bocci

Virgili

et al. 2020

Advances in Materials Science and Engineering

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The development of non‐black asphalt mixtures for surface courses may play a significant role to improve functional, aesthetic and environmental issues of road pavements. Nowadays, the development of clear binders as substitutes for traditional bitumen in asphalt mixtures, which combine durability and mechanical properties, exalting the color of pavements for a better integration of road networks in urban and environmentally sensitive areas, is undoubtedly a timing challenge. However, the selection and classification of clear binders are often based only on color and standard requirements referred to traditional bitumen that do not describe consistently the binder behavior. A better understanding on clear binder properties is required to guide the aggregate selection and the mix design for surface layer, merging safety, aesthetical and environmental benefits into long lasting pavement. This paper presents a comprehensive experimental program, including empirical tests, infrared spectrum analysis, and rheological testing over a wide range of temperature and frequency, to determine the overall mechanical behavior of three clear binders. Results highlighted that the selected clear binders differ from traditional bitumen in terms of mechanical behavior. Different composition or origin can induce to completely different performance. Moreover, the combination of several testing procedures allowed suggesting specific application methods and uses for the three clear binders.

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