## 1 Introduction  
The snow-icing phenomenon of roads is a common and urgent problem, which is serious in North America, northern Europe, Russia, and northeast China. At present, countries generally use mechanical snow removal or a snow melting agent for melting ice [1]. The snow removal efficiency of traditional machinery is high, but most of them are only suitable for removing fresh snow that has not been roller compacted. The removal efficiency of thin or thicker ice accumulations on frozen road sections is not ideal, and the road surface is seriously damaged by forced eradication, resulting in additional costs for road maintenance [2, 3]. The vast majority of snow melting agents are inefficient, costly, and are pollutants, causing serious corrosion to pavements and bridge decks [4]. Considering the harm of ice and snow in cold areas to road traffic and the defects of existing snowmelt ice methods, how to achieve scientific, effective, and environmentally-friendly economic road (especially alpine region) has become an urgent problem to be solved nowadays. Considering the deficiencies of traditional deicing methods, in the field of de-icing agents, people began to consider how to reduce harm to the environment and the main project, tending to adopt environmentally-friendly snow-removing agents [5]; in terms of snow-melting ice technology, researchers focused on the suppression of frozen pavements, thermal heating, energy conversion, and other new technologies for melting snow [6; 7]. Among them, the road deicing technology using microwave heating for de-icing has been widely popularized and applied. The new method of thermal snowmelt ice-melting has demonstrated incomparable advantages to other deicing methods in practical engineering. The microwave deicing method utilizes a microwave heating technique to increase the road surface temperature, thereby melting and separating the contact layer between the ice layer and the road surface, and then breaking the separated ice layer through other mechanical actions [8; 9]. The microwave deicing method has a high deicing efficiency, and does not leave ice slag after clearing the ice layer. It is an environmental protection method that has no damage to the road and has promising prospects. In the 1970s, some developed countries began to study the application of microwave heating technology in the pavement thermal regeneration field, using microwave energy to heat the road surface and achieve thermal protection of it [10]. In 1987, [PERSON] studied the winter road non-contact deicing project and designed a microwave deicer. The project failed to be implemented because the deicing efficiency was too low [11; 12]. [PERSON] et al. established the microwave deicing model, designed the microwave deicing test vehicle [13; 14], and conducted further research on road microwave deicing technology. In 2003, [PERSON] proposed the idea of using microwave heating technology to deicing roads for the first time in China. Microwave deicing experiments were conducted using microwave ovens. The results show that microwave deicing is feasible. The deicing efficiency of different road materials were studied through design experiments, and it was proposed that different road materials have different microwave deicing efficiencies [15; 16]; In 2004, the NRRI (National Regulatory Research Institute) organization in Minnesota of the United States proposed to build a pavement with strong microwave absorption capacity using the twill rock asphalt mixture. It is advantageous for pavement rapid microwave repair and microwave deicing, and to use this technology to build a microwave road test section [17; 18]. [PERSON] et al. analyzed the application of 5.8 GHz microwaves in the deicing of asphalt pavements.