室内光照下沥青混凝土内部温度的理论和试验研究

Theoretical and Testing Research on Internal Temperature of Asphalt Concrete under Light Irradiation

随着"热光电"在沥青路面中交叉应用研究的逐渐流行,在实际研究中,有时需要在室内模拟太阳光对沥青混凝土的照射。为了计算光照下沥青混凝土内的温度,在室内用红外灯进行模拟,利用传热学的原理对沥青混凝土的温度场进行数学运算,得出解析解,该解与沥青混凝土初温、导热系数、热扩散系数、光照时间、热流密度、被测点深度等因素密切相关。同时通过实验实测温度分布,将解析解与实测值进行对比,光照时间越短、深度越大,沥青混凝土内的温度实测值与理论计算值越接近。因此,该解析解在一定条件下可用于光照下沥青混凝土内部温度的快速判断。

As the research of heat - light - electricity in asphalt pavement is becoming popular, it is necue was measured. Compared with analytical value, it showed that two values were closer to each other with light irradiation time getting shorter or depth of measuring point getting larger. Therefore, the analytical solution could be taken as a quick method in some occasions to determine internal temperature of asphalt concrete under light irradiation.