Abstract: The present work aims to determine the efficacy of various pollution conditions on the cooling performance of road cooling coating. We fabricated two kinds of cooling coatings and obtained their basic road performance, and also established three kinds of simulated working conditions, i.e. dust pollution, oil pollution and chemical pollution, which were expected to imitate actual pollution situation of road. Based on Matlab, the pollution level of the cooling coating surface under different pollution conditions was analyzed, and the cooling efficacy of the above mentioned cooling coatings subjected to different pollution conditions were evaluated systematically by a mean of outdoor cooling efficacy test. Our experiment, indicated the small and mutually unequal decrements of the cooling coatings’ efficacy under different levels of those three conditions. The dust pollution conditions lead to the efficacy declines ranging from 0.4 ℃ to 1.3 ℃, compared to the original efficacy level. The efficacy reduction was about 1.2—3.1 ℃ with respect to the cooling coating subjected to various types of oil pollution conditions, in which the diesel oil pollution holds the greatest attenuation effect upon the cooling performance. We also observed the slight efficacy deterioration within 2.3—2.4 ℃ induced by different types of chemical pollution condition, in which the NaOH and HCl solutions exhibit approximately equivalent influence.
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2018, Vol. 32 
