Experimental Study on the Bond Destruction Between Snow/Ice and Anti-Freezing Pavements, Depending on Properties of Snow/Ice and Number Of Wheel Load Passes

The bond destruction between snow/ice and anti-freezing pavements is mainly assessed quantitatively by the relationships between bare pavement ratio (using computer image processing), the degree of scatter or stripping of snow/ice, the friction coefficient (u), and the number of wheel load passes. Results are compared with test results from the dense-graded asphalt pavement used as a control pavement. As for the snowpack, the bond-destruction and the increase of u are evaluated on the gum-rolled pavement that has a flexible surface texture under 100 to 500 passes at -5 deg C and 5 kN wheel load (200 kPa tire pressure). As a result of tests, the anti-freezing effects of anti-freezing pavements are evaluated and confirmed at -5 deg C. For the same tests and pavement but at -10 deg C, increased friction effects were found to be insufficient under the passenger car wheel load. Therefore, it is necessary in the future to develop a more effective hybrid type anti-freezing pavement (such as gum-rolled pavement combined with a deicing chemical in the asphalt mixture) to cause bond-destruction to all of snow/ice surfaces at -10 deg C.