Research on Ice Suppression and Performance Evaluation of Anti-Freezing Pavement

Under the rainy and snowy weather in winter in the north, the snow and ice on the asphalt pavement have extremely adverse effects on the vehicle driving safety and road traffic capacity, such as the reduction of driving speed and the increase of traffic accident rate. In order to reduce these impacts, a variety of anti-freezing pavement technologies have been developed. At present, the anti-freezing pavement technologies can be divided into active and passive types. As a technology with the advantages of anti-freezing pavement, environmental friendliness, and construction convenience, the chemical material inhibition freezing pavement technology has received extensive attention in recent years. This technology refers to adding a certain amount of salt storage snow melting and ice suppression materials to the asphalt pavement in advance, so that the snow melting components can be actively dissolved and precipitated in the wet environment. In this paper, two different specifications of antifreeze ice modifiers are used to design the mix proportion of antifreeze ice pavement, and the impact breaking test is developed to evaluate the antifreeze effect of the mixture of different antifreeze ice modifiers, the falling rate of asphalt mixture with anti-freezing agent increased obviously, and the falling rate of asphalt mixture with AF-I reached 60%. Finally, the indoor tests show that the high temperature stability and water stability of the mixture meet the performance requirements. The research in this paper shows that chemical inhibiting materials as additives can effectively inhibit the adhesion of ice when the performance of asphalt mixture meets the requirements, it improves the driving safety on bad weather roads and have a positive impact on the practice of anti-freezing pavement technology.