采用分布分形维数分析不同级配对沥青混合料热物性能的影响

发布时间：2018-06-23 15:51

本文选题：沥青混合料 + 热传导系数　；参考：《武汉理工大学学报》2015年10期

【摘要】：利用热常数分析仪Hot Disk测定沥青混合料热常数,通过对热物性参数热传导系数、热扩散系数、体积比热容3个参数对比分析,以此来比较不同级配对沥青混合料热物性参数的影响。在此基础上,以集料粒径分布分形维数D作为表征不同级配特征的参数,建立了热物性参数与粒径分布分维数D的相关关系。结果表明:热传导系数、热扩散系数和体积比热容与粒径分布分形维数D之间存在着较强的线性相关性;粒径分布分形维数D越大,沥青混合料热传导系数和热扩散系数越小,体积比热容越大。
[Abstract]:The thermal constant of asphalt mixture was measured by hot disk, and the thermal conductivity, thermal diffusion coefficient and volume specific heat capacity of asphalt mixture were compared and analyzed by means of thermal physical parameters, thermal conductivity coefficient, thermal diffusion coefficient and volume specific heat capacity. The effect of different gradation on the thermal properties of asphalt mixture was compared. On this basis, the fractal dimension D of aggregate particle size distribution is taken as the parameter to characterize the different gradation characteristics, and the correlation relationship between the thermal physical property parameters and the fractal dimension D of particle size distribution is established. The results show that there is a strong linear correlation between thermal conductivity coefficient, thermal diffusion coefficient, volume specific heat capacity and fractal dimension D of particle size distribution, and the larger the fractal dimension D of particle size distribution, the smaller the thermal conductivity and thermal diffusion coefficient of asphalt mixture. The larger the specific heat capacity of the volume.
【作者单位】：武汉理工大学硅酸盐建筑材料国家重点实验室;
【基金】：国际合作专项项目(2013DFE83100) 长安大学中央高校基本科研业务费专项资金资助项目(2014G1502012)
【分类号】：U414

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