Material Composition Design And Performance Study Of Slow-release Anti-icing Fog Seal

Roads,especially in special areas such as mountain roads,bridge tunnels,etc.,are prone to produce ice condensation on the pavement in winter.In these cases,the anti-sliding ability of roads drops dramatically,which can easily cause traffic accidents.Therefore,research scholars at home and abroad are committed to study various methods of removing ice and snow on the roads.To solve the problems of low deicing efficiency and serious environmental pollution of traditional passive de-icing and snow methods,a core-shell structured slow-release anti-icing material has been prepared and applied to the fogging layer in this paper based on the research program of Henan province department of transportation,which combines preventive maintenance with active de-icing and snow technology.In order to meet the requirements of road ice melting durability,the structural design and action mechanism of slow-release anti-icing material with the core-shell structure are proposed based on the principle of reducing the freezing point of salted asphalt pavement.Moreover,a slow-release anti-icing material is developed from the preparation of the slow-release inorganic salt core material and the synthesis of the polymer shell.The preparation method of the slow-release inorganic salt core material is proposed by the the evaluation index and method of the adsorption performance of the porous carrier.The type of porous carrier and the ratio of each material in the slow-release inorganic salt core material can be determined by the adsorption rate test.A polymer shell with a glass transition temperature close to 0℃is synthesized by in-situ polymerization based on the polymer’s glass transition theory.The performance of the slow-release anti-freeze ice material is evaluated from the aspects of microscopic performance,coating performance and ice melting performance.A slow-release anti-icing fog seal material is designed to achieve the desired requirement of function and usage,and its ice-melting performance,mechanical properties and permeability properties are evaluated.The optimization design theory of response surface method is used to study the performance of slow-release anti-icing fog seal material influenced by the amount of the slow-release anti-icing fog seal material,penetrant and waterborne epoxy resin modifier and the types of penetrant.Ice melting performance,mechanical properties and permeability are used to evaluate the performance of slow-release anti-icing fog seal material.A Box-Behnken model is established to determine the optimized ratio of slow-release anti-icing fog seal material,penetrant and waterborne epoxy resin modifier by the optimization design theory of response surface method.This model is about the performance of slow-release anti-icing fog seal material influenced by the slow-release anti-icing fog seal material,penetrant and waterborne epoxy resin modifier and the types of penetrant.The optimal ratio of the slow-release anti-icing fog seal material,waterborne epoxy resin modifier and penetrant are 13%,20%and 12%,respectively.The proposed pavement spreading amout of the slow-release anti-icing fog seal material is 0.75kg/m~2based on the curing characteristics,anti-sliding properties and permeability of the slow-release anti-icing fog seal material.By testing the wear resistance of the slow-release anti-icing fog seal material by different lithology wear-resistant particles,it can be concluded that wear resistance is improved by the alkaline,hard and strong stones.The freezing point of the slow-release anti-icing fog seal material after a single freeze-thaw roll is-3.8℃by the freezing point test.According to freezing point by repeated freezing and thawing and rolling cycles of the slow-release anti-icing fog seal material,the inorganic salts in the fog sealing layer can be effectively and continuously precipitated,and it has a lasting melting effect.