A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Research on the Thermal Insulating Performance of Ceramic Asphalt Concrete Based on Thermophysical Properties
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°C. 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.
Research on the Thermal Insulating Performance of Ceramic Asphalt Concrete Based on Thermophysical Properties
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°C. 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.
Research on the Thermal Insulating Performance of Ceramic Asphalt Concrete Based on Thermophysical Properties
J. Highway Transp. Res. Dev. (English Ed.)
Meng, Fan-qi (author) / Qian, Zhen-dong (author) / Yang, Li-guang (author)
2016-06-01
Article (Journal)
Electronic Resource
English
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