Comparative Analysis of Thermally Investigated Pigment-Modified Asphalt Binders
Publication: Airfield and Highway Pavements 2023
ABSTRACT
Non-black pavement surfaces may be more vulnerable to distress associated with high temperatures due to the high surface temperatures of conventional black asphalt. Since asphalt is viscoelastic and temperature sensitive, it is more likely to be damaged by traffic loading at higher temperatures. This contributes to the urban heat island (UHI) effect, thus necessitating the use of coloring or cooling additives to help lower pavement surface temperatures. In response to these issues, iron oxide red, titanium dioxide white-modified bituminous mixtures, and clear asphalt binder were thermally investigated under different heat fluxes and compared with a conventional binder. In addition, the corresponding asphalt mixtures were prepared and compared with conventional asphalt mixtures. Each combination has also been observed for the rate of heating and cooling. Compared to traditional black bitumen, the clear binder and pigment-modified binder absorb up to 15% less heat. In addition, asphalt made with a clear asphalt binder and pigmented asphalt takes more time to heat and less time to cool than conventional asphalt.
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Information
Published In
Airfield and Highway Pavements 2023
Pages: 174 - 184
History
Published online: Jun 13, 2023
ASCE Technical Topics:
- Asphalt pavements
- Asphalts
- Binders (material)
- Comparative studies
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Gravels
- Infrastructure
- Materials characterization
- Materials engineering
- Measurement (by type)
- Methodology (by type)
- Mixtures
- Pavement condition
- Pavements
- Research methods (by type)
- Temperature effects
- Temperature measurement
- Thermal analysis
- Thermodynamics
- Transportation engineering
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