Study on snow melting effect and evaluation index of phase change asphalt mixture
To determine the snow melting effect and the evaluation index of DTC phase change material(PCM)in asphalt pave-ment,the snow melting effect of phase change asphalt mixture under low temperatures was studied and analyzed by designing indoor and outdoor snow melting tests.The asphalt mixture specimens without phase change materials was taken as the control group.The results show that the phase change material in asphalt mixture has a noticeable thermoregulation effect,and the larger the dosage,the greater the snow melting effect.When the phase change material dosage is 0.5%and the snow thickness are 1.5 cm and 3.0 cm,respectively,the phase change asphalt mixture snow melting rate increased by 19.0%and 16.0%compared with ordinary asphalt mixture.Based on the indoor and outdoor snow melting tests,the snow thickness change rate(Δh)and residual snow cover-age(RSC)were proposed as the comprehensive evaluation indexes of the snow melting effect of phase change asphalt mixture.
phase change asphalt mixtureindoor snow-melting testoutdoor snow-melting testsnow-melting effectevaluation index
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