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沥青混凝土在太阳光的照射下温度迅速上升,影响路面的高温稳定性。通过室内试验,采用红外光模拟太阳光照射,利用热管良好的传热特性,可将沥青混凝土内部的热量快速转移,有效降低路面内的升温速率。埋有热管的沥青混凝土试块内部升温速度小于未埋热管试块,且越接近热管热端的部位升温越慢,并增大路面降温过程中的降温速率;埋有热管试块的降温速度明显大于未埋热管试块,90 min时间内埋管试块的降温幅度约高出10℃,从而提高路面的热稳定性。
Asphalt concrete in the sunlight of the rapid rise in temperature, affecting the high temperature stability of the road. Through indoor experiments, the use of infrared light simulation of sunlight, the use of heat pipe good heat transfer characteristics of asphalt concrete internal heat can be quickly transferred to effectively reduce the heating rate within the road. The internal heating rate of asphalt concrete block embedded with heat pipe is less than that without embedded heat pipe, and the closer to the hot end of the heat pipe, the slower the temperature rise, and the lower the cooling rate in the process of cooling; the cooling rate of buried heat pipe is obviously greater than In the test without embedding the heat pipe, the temperature drop of the embedding pipe in 90 min time is about 10 ℃ higher, which improves the thermal stability of the road.