Influence of Heat Pipe on Cooling Characteristics and High Temperature Stability of Asphalt Mixture

Abstract

Abstract: In order to effectively improve the high temperature stability of the asphalt pavement, the asphalt mixture rutting specimens without embedded and with embedded heat pipe were prepared based on the principle of the gravity heat pipe cooling.The heating and cooling processes of the rutting specimens were simulated by an oven. The temperature sensor and temperature gun were used to collect the temperature data at different positions of the rutting specimens in real time. The enthalpy change value and temperature gradient in a specific calculation range was analyzed to study the effect of heat pipe on the cooling characteristics of the asphalt mixture rutting specimens. The influence of the heat pipe on the rutting resistance of the asphalt mixture was studied. The results show that the heat pipe can adjust the temperature change of the asphalt mixture to a certain extent, and reduce the influence of temperature on the asphalt mixture. The heat pipe can enhance the dynamic stability and improve the high-temperature rutting resistance of the asphalt mixture significantly.

Key words: asphalt mixture, heat pipe, cooling characteristic, enthalpy change, temperature gradient, high temperature stability

CLC Number:

U416.217

FENG Zhengang, MA Jinyuan, LIU Chang, WANG Wei, DENG Xinlong, LIN Songshan. Influence of Heat Pipe on Cooling Characteristics and High Temperature Stability of Asphalt Mixture[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2437-2443.

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