Bidirectional Heat-induced Phase Change Structure of Asphalt Pavement for Reducing the Pavement Temperature
GONG Xing1, YING Hong1, LIANG Fengxin1, LIU Weidong1,2,*, XU Xiuquan1
1 School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, Guangxi, China 2 Guangxi Key Laboratory of Road Structure and Materials, Guangxi Transportation Science and Technology Group Co., Ltd., Nanning 530007, China
Abstract: To reduce the temperature and rutting of asphalt pavement, a bidirectional heat-induced phase change structure (BHI-PCS) was designed through the combination of phase transition heat storage and heat induction. And a blank structure (BS), phase change structure (PCS) with only phase change added, and bidirectional heat-induced structure (BHIS) with only thermal conductive material added were set as the control group. Based on the ABAQUS finite element analysis, the internal heat change and rutting resistance of different structures were simulated, and the cooling effect was verified by the laboratory temperature test. The results show that compared with the control group, BHI-PCS has a more significant effect on reducing road temperature, with the maximum simulated temperature reduced by 4.1 ℃. The laboratory temperature test results are in good agreement with the simulation calculation results. At the same time, BHI-PCS has a strong ability to resist rutting, and the maximum rutting depth can be reduced by 46.5%. The proposed structure can provide reference for reducing the temperature of asphalt pavement in high-temperature areas and alleviating the rutting problem of pavement.
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2023, Vol. 37 
