Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Impact of Pavements on the Urban Heat Island
Increasing urbanization has led to the development of Urban Heat Islands (UHIs), with serious implications for the environment. Pavements play a role in this by absorbing and storing more heat than the natural surfaces that they replace. To quantify this effect, a method based on radiation view factors was developed to measure the surface albedo of pavement mixes. Furthermore, the aging behavior of both asphalt and concrete was also investigated. These inputs were then used in a 1D pavement thermal model, ILLI-THERM, and several criteria were developed to study the UHI impact of the pavement. The radiative forcing (RF) metric showed that albedo was the most significant thermal property affecting pavement UHI. However, considering the energetics through the pavement during an average seasonal day revealed that RF does not take into account lags in the temperature field that have the potential to mitigate UHI during certain hours of the day. Finally, a demonstration of how concrete inlays may be used to mitigate UHI through multi-functional materials and mix designs was conducted.
Impact of Pavements on the Urban Heat Island
Increasing urbanization has led to the development of Urban Heat Islands (UHIs), with serious implications for the environment. Pavements play a role in this by absorbing and storing more heat than the natural surfaces that they replace. To quantify this effect, a method based on radiation view factors was developed to measure the surface albedo of pavement mixes. Furthermore, the aging behavior of both asphalt and concrete was also investigated. These inputs were then used in a 1D pavement thermal model, ILLI-THERM, and several criteria were developed to study the UHI impact of the pavement. The radiative forcing (RF) metric showed that albedo was the most significant thermal property affecting pavement UHI. However, considering the energetics through the pavement during an average seasonal day revealed that RF does not take into account lags in the temperature field that have the potential to mitigate UHI during certain hours of the day. Finally, a demonstration of how concrete inlays may be used to mitigate UHI through multi-functional materials and mix designs was conducted.
Impact of Pavements on the Urban Heat Island
J. Roelser (Autor:in) / S. Sen (Autor:in)
2016
112 pages
Report
Keine Angabe
Englisch
Transportation , Highway Engineering , Construction Equipment, Materials, & Supplies , Road Transportation , Transportation & Traffic Planning , Urban Heat Island , Concrete pavement , Heat flux , Environmental benefits , Albedo variations , Multi-functional materials , Concrete inlays , Heat measurement
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