改进试验测定沥青混合料导热系数与分析

An Improved Test for the Measurement and Analysis of Thermal Conductivity

导热系数是沥青混合料最重要的热物理性能参数之一。在有限的实验条件下,针对热线法测量沥青混合料导热系数的不足,对其进行设计改进,并且用改进试验对石墨等体积替代矿粉的沥青混合料导热系数进行了测定,得到在一定百分数范围内导热系数随石墨等体积替换矿粉百分数的增加而变大,为将来工程应用提供了一定的参考。

Coefficient of thennal conductivity is one of the most important themnophysical parameters of asphalt mixture. Under limited experimental conditions, for the hot - wire method measuring asphalt mixture thermal conductivity sholtcomings, we design and improve it, and we use it to detemline the thermal conductivity of asphalt mixture which use graphite instead of part of the mineral powder with same volume, It indicate that replacing same volume mineral powder with graphite in certain proportions thermal conductivity becomes larger with the increase of percentage of graphite. It also can prmvide reference for future engineerin; aoolications.