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热反射沥青路面被尘土污染后会造成降温性能的大幅下降,应用光学原理分析得出,热反射沥青路面降温性能的下降原因有:1)尘土对光线的吸收率高于热反射沥青路面;2)热反射沥青路面被尘土污染后表面粗糙度增大,表面粗糙度增大造成光线在表面反射次数增加,两者都会使热反射沥青路面表面吸收热量增多,降温性能下降。同时提出了热反射沥青路面在应用过程中针对尘土污染所采取的应对措施。
Thermal reflection of asphalt pavement dust pollution caused by a substantial decline in cooling performance, the application of optical theory analysis shows that the thermal reflection of asphalt cooling performance degradation reasons: 1) the dust absorption of light is higher than the heat reflective asphalt pavement; 2 ) Heat-reflective asphalt surface is polluted by dust, the surface roughness increases. The increase of surface roughness causes the increase of light reflection on the surface. Both of them will increase the absorbed heat on the surface of heat-reflective asphalt pavement and decrease the cooling performance. At the same time, the countermeasures for the dust pollution in the application of heat-reflective asphalt pavement are put forward.