Shear failure behavior of the interface between asphalt mixture and ice layer by electromagnetic induction heating

Abstract

Induction heating has been widely applied for asphalt pavement deicing. However, it is challenging in practice to accurately determine the optimal deicing times, which can lead to inefficiency and extra energy consumption. To address these issues, an electromagnetic induction heating shear deicing detection device was developed to capture the deicing times in this research. The heating characteristics of steel fiber modified asphalt mixtures were investigated under different steel fiber contents, heating distances and currents. The Interface Failure Times (IFTs) were obtained from shear force curves recorded by the device. The response surface methodology was applied to the prediction of the heating characteristics and IFTs. Afterwards, the effects of the texture depth and solution media on the shear deicing behavior were evaluated. The deicing performance of steel fiber coatings with varying areal densities was assessed. The results indicated that the heating characteristics and IFTs were well predicted by the ternary quadratic equation under different test conditions. The deicing times obtained from the IFTs were shorter and more intuitive than the ones derived from the heating rate. The removal of the ice from the mixture surface was hindered by its interaction with the surface texture. The salt ions promoted the generation of bubbles and pores in the ice, resulting in shorter IFTs. In addition, the steel fiber coating improved deicing efficiency by 26.2 % and reduced the steel fiber content by 90.3 % compared to the steel fiber modified asphalt mixture. These findings further contribute to high-efficiency deicing with low energy consumption and cost.