基于热物性的陶瓷沥青混凝土阻热性能研究

doi:10.3969/j.issn.1002-0268.2015.11.004

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摘要 The thermal insulating performance of ceramic asphalt concrete (CAC) is investigated based on the thermophysical parameters of asphalt mixture. CAC is produced by the replacement of the coarse aggregate in SMA-13 with ceramic aggregate by the same volume.The replacement percentages are 10%, 20%, 30%, 40%, and 50%. Thermophysical parameters (i.e., thermal conductivity, thermal diffusivity, and specific heat capacity) of the mixtures with different ceramic replacement contents are tested, and the thermal insulating effect of the CAC surface with different ceramic replacement contents on pavement is simulated. The relationship between the maximum temperature in pavement structure and the thermophysical parameters is analyzed using the gray correlation method. Results show that:(1) the addition of ceramic aggregate changes the thermophysical parameters of the mixture. Approximately 10% ceramic replacement percentage results in a reduction of thermal conductivity and thermal diffusivity by 20.5% and 23.5% respectively, and an increase of specific heat capacity by 20.9%. (2) The influence of ceramic decreases as the ceramic replacement percentage increases. FE analysis results show that, compared with the 4 cm thickness SMA-13 surface, ceramic reduces the temperature in pavement structure effectively, and 40% replacement percentage of CAC-13 significantly reduces temperature on the surface bottom by 5.2℃. Gray correlation analysis shows that three thermal parameters influence pavement temperature, and thermal conductivity has the most significant effect on temperature, followed by thermal diffusivity and specific heat capacity.

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	孟凡奇
	钱振东
	杨理广

关键词 ： road engineering, ceramic asphalt concrete, transient plane heat source method, temperature field simulation, gray correlation analysis, thermophysical parameter, thermal insulating performance

Abstract：The thermal insulating performance of ceramic asphalt concrete (CAC) is investigated based on the thermophysical parameters of asphalt mixture. CAC is produced by the replacement of the coarse aggregate in SMA-13 with ceramic aggregate by the same volume.The replacement percentages are 10%, 20%, 30%, 40%, and 50%. Thermophysical parameters (i.e., thermal conductivity, thermal diffusivity, and specific heat capacity) of the mixtures with different ceramic replacement contents are tested, and the thermal insulating effect of the CAC surface with different ceramic replacement contents on pavement is simulated. The relationship between the maximum temperature in pavement structure and the thermophysical parameters is analyzed using the gray correlation method. Results show that:(1) the addition of ceramic aggregate changes the thermophysical parameters of the mixture. Approximately 10% ceramic replacement percentage results in a reduction of thermal conductivity and thermal diffusivity by 20.5% and 23.5% respectively, and an increase of specific heat capacity by 20.9%. (2) The influence of ceramic decreases as the ceramic replacement percentage increases. FE analysis results show that, compared with the 4 cm thickness SMA-13 surface, ceramic reduces the temperature in pavement structure effectively, and 40% replacement percentage of CAC-13 significantly reduces temperature on the surface bottom by 5.2℃. Gray correlation analysis shows that three thermal parameters influence pavement temperature, and thermal conductivity has the most significant effect on temperature, followed by thermal diffusivity and specific heat capacity.

Key words： road engineering ceramic asphalt concrete transient plane heat source method temperature field simulation gray correlation analysis thermophysical parameter thermal insulating performance

收稿日期: 2015-11-05

基金资助:Supported by the National Natural Science Foundation of China (No.51178114);the National Key Technology R&D Program (No.2009BAG15B03);and the Project of Urumqi Science and Technology Bureau (No.Y131320007)

通讯作者: MENG Fan-qi,E-mail address:328787332@qq.com E-mail: 328787332@qq.com

引用本文:

孟凡奇, 钱振东, 杨理广. 基于热物性的陶瓷沥青混凝土阻热性能研究[J]. Journal of Highway and Transportation Research and Development, 2016, 10(2): 1-7.
MENG Fan-qi, QIAN Zhen-dong, YANG Li-guang. Research on the Thermal Insulating Performance of Ceramic Asphalt Concrete Based on Thermophysical Property. Journal of Highway and Transportation Research and Development, 2016, 10(2): 1-7.

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