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A platform for research: civil engineering, architecture and urbanism
Finite element simulation of self-heated pavement under different mechanical and thermal loading conditions
Aiming to overcome the hazards associated with icy roads, a new technique to de-ice pavement surfaces is proposed in this paper. The idea of this technique is to bury small-diameter heat exchange loops in the pavement’s base layer, which will be heated using geothermal or solar energy via a circulating fluid. The fluid will be circulated using a pump that will be powered by a solar system. In order to optimise the design of pavement loops, i.e. geometry and material, to ensure acceptable thermal and mechanical performance, finite element analyses were conducted. The simulation results show that the loop geometry and material have a limited effect on the mechanical performance of pavement due to their small diameter-to-length ratio. From the thermal performance standpoint, the material of the loop affects the temperature distribution in the pavement significantly; the higher the thermal conductivity of the loops, the hotter the pavement section. Moreover, the pavement surface temperature remains ice-free when warm water at 23°C is circulated in aluminium loops spaced at 300 mm and placed at depth 25 mm below the bottom of the asphalt, indicating that sufficient amount of thermal energy can be provided to the pavement via the presented technique to keep its surface ice-free.
Finite element simulation of self-heated pavement under different mechanical and thermal loading conditions
Aiming to overcome the hazards associated with icy roads, a new technique to de-ice pavement surfaces is proposed in this paper. The idea of this technique is to bury small-diameter heat exchange loops in the pavement’s base layer, which will be heated using geothermal or solar energy via a circulating fluid. The fluid will be circulated using a pump that will be powered by a solar system. In order to optimise the design of pavement loops, i.e. geometry and material, to ensure acceptable thermal and mechanical performance, finite element analyses were conducted. The simulation results show that the loop geometry and material have a limited effect on the mechanical performance of pavement due to their small diameter-to-length ratio. From the thermal performance standpoint, the material of the loop affects the temperature distribution in the pavement significantly; the higher the thermal conductivity of the loops, the hotter the pavement section. Moreover, the pavement surface temperature remains ice-free when warm water at 23°C is circulated in aluminium loops spaced at 300 mm and placed at depth 25 mm below the bottom of the asphalt, indicating that sufficient amount of thermal energy can be provided to the pavement via the presented technique to keep its surface ice-free.
Finite element simulation of self-heated pavement under different mechanical and thermal loading conditions
He, Xin (author) / Abdelaziz, Sherif (author) / Chen, Fangliang (author) / Yin, Huiming (author)
Road Materials and Pavement Design ; 20 ; 1807-1826
2019-11-17
20 pages
Article (Journal)
Electronic Resource
English
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