Research On Deicing Test And Application Based On The Weakening Of Pavement-Ice Interface

Snow or icing on roads in winter affects road traffic safety and poses a serious threat to people’s lives and property.In view of the problems of low efficiency of deicing and snow removal,high labor cost and environmental pollution in traditional deicing and snow removal technology,based on the principle of weakening the bonding strength of the icing layer and reducing the phase transition point of the icing temperature,it is aimed at reducing the hydrophobicity of the pavement-ice bonding force.Laboratory trial production and experimental research have been carried out on the anti-icing material,and the trial application research on deicing and snow removal has been carried out on the asphalt pavement in cold season.According to the Gibbs free energy formula and the principle of reducing the freezing point of dilute solutions,the main factors affecting the effect of ice and snow melting are discussed;based on the technical route of hydrophobic ice suppression material long-acting slow-release snow-melting agent,the slow-release effect of porous materials is adopted to improve the removal.Ice and snow coating inhibits the persistence of icing.According to the technical route of weakening the cohesive force between the pavement and the ice layer and reducing the adhesion work,the theoretical analysis of improving the hydrophobic performance of the pavement through the hydrophobic mechanism,combined with the hydrophobic theoretical model of the Young equation,the improvement of the pavement is discussed from the change of the contact angle technical approach to hydrophobic properties.Based on theoretical analysis,the auxiliary technical measures to reduce the pavement-ice adhesion force to improve the efficiency of mechanical deicing are proposed.Based on the theory of the weakening of the pavement-ice interface,a hydrophobic ice suppression material scheme consisting of matrix components,melting ice components and hydrophobic components is proposed;through matrix component performance analysis,melting ice composition ratio optimization test,and hydrophobic composition distribution the ratio optimization test determines the mass ratio of each component.After the optimization of the components,the hydrophobic ice suppression material’s deicing and snow removal effect,effective number of actions,pavement anti-skid performance,environmental effects and other aspects were tested and analyzed.The research results show that the hydrophobic icesuppressing coating can increase the contact angle of the pavement solution to 96.3°,obtain strong hydrophobicity,and reduce the bonding strength between the pavement and the ice layer.The surface of the coating is intact after being immersed in water for 48 hours,and the conductivity value is 422μs/cm after four snow melting,which shows that when the road surface encounters four times of icing and deicing,the coating can maintain a more obvious effect of snow melting and deicing.After the pavement is covered with the coating,the antiskid performance is very small,and the pendulum value BPN is reduced by only about 3%;in addition,the leaching solution of the coating material has no obvious effect on the growth of surrounding plants,and has no obvious corrosiveness to the metal of the facility.Based on the field application test of hydrophobic ice suppression material,the material has a relatively convenient field test construction technology,and also has a certain improvement effect on melting-deicing and snow performance in the field environment,especially compared with traditional ice and snow removal technology,it has certain economic benefits and environmental benefits.