Research on the method of evaluating the degree of bonding between salt-storage asphalt mixtures and ice layer
To more accurately evaluate the adhesion degree between salt-storage asphalt mixture and ice layer, this research develops a test method based on a full cross-section of a Marshall specimen by improving the pulling head, ice layer freezing method and pulling mode, with adhesion strength and residual ice ratio as evaluation indexes.Results show the adhesion strength and residual ice ratio increase with decreasing temperature.When the temperature is above - 10℃, salt-storage asphalt mixture decreases the adhesion strength of the specimens and ice layer by over 30％.At a temperature of -7℃, the adhesion strength is reduced by approximately 50％ compared to normal asphalt mixtures.Additionally, at temperatures below -9℃, the residual ice ratio reduction rate is more than 50％.The accuracy of measuring the adhesion strength between the ice layer and the specimen decreases when the residual ice ratio increases.This testing method is only advised when the temperature exceeds -10℃.The self-developed test method used to assess the adhesion degree between the ice layer and the specimen exhibits a significant level of distinction, and the variation coefficient of the test remains within 10％, demonstrating a high stability.
salt-storage asphalt mixtureadhesion strength between ice layer and mixtureevaluation method of deicing performancesalt-storage additive
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