Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Cooling Properties of Asphalt Surfaces
Cooling properties of hot mix asphalt (HMA) are important to transportation agencies and contractors in a surfacing or resurfacing operation. The cooling rate of an HMA overlay dictates how soon a roadway can be opened to traffic without having any potentially serious consequences on the pavement performance. The ease or difficulty of compacting HMA paving mixtures by rolling is influenced by the viscosity-temperature characteristics of the asphalt cement and the temperature of the mix during compaction. Thus, knowing the cooling rate of HMA provides the contractor information such as the extent of time within which breakdown rolling must be completed to ensure quality of the pavement and also when a roadway can be opened to traffic following a surfacing/resurfacing job without any detrimental consequences. A finite difference computer code provided in the reference as well as a general purpose finite element program ABAQUS were used to compute the time needed by a HMA layer to cool to 150 F. In this work, the time to cool to various given average mat temperatures was computed for various laydown (200-300 F) and base temperatures (50-120 F).
Cooling Properties of Asphalt Surfaces
Cooling properties of hot mix asphalt (HMA) are important to transportation agencies and contractors in a surfacing or resurfacing operation. The cooling rate of an HMA overlay dictates how soon a roadway can be opened to traffic without having any potentially serious consequences on the pavement performance. The ease or difficulty of compacting HMA paving mixtures by rolling is influenced by the viscosity-temperature characteristics of the asphalt cement and the temperature of the mix during compaction. Thus, knowing the cooling rate of HMA provides the contractor information such as the extent of time within which breakdown rolling must be completed to ensure quality of the pavement and also when a roadway can be opened to traffic following a surfacing/resurfacing job without any detrimental consequences. A finite difference computer code provided in the reference as well as a general purpose finite element program ABAQUS were used to compute the time needed by a HMA layer to cool to 150 F. In this work, the time to cool to various given average mat temperatures was computed for various laydown (200-300 F) and base temperatures (50-120 F).
Cooling Properties of Asphalt Surfaces
D. H. Chen (Autor:in) / M. Zaman (Autor:in) / J. Laguros (Autor:in)
1994
76 pages
Report
Keine Angabe
Englisch
Construction Equipment, Materials, & Supplies , Highway Engineering , Physics , Hot mix paving mixtures , Asphalt pavements , Cooling , Heat transfer , Finite element method , Road materials , Pavement overlays , Finite difference method , Temperature distribution , Thermal analysis , Compacting , Highway maintenance , ABAQUS finite element program
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