Slow-release salt-melting material for road surface thin ice, ice- inhibiting fog sealing layer material and application

Abstract

The invention discloses a slow-release salt-melting material for road surface thin ice and an ice-inhibiting fog sealing layer material. An ice-melting salt is dissolved into high-temperature water atthe maximum concentration to prepare a saturated solution of the ice-melting salt, diatomite powder is added to adsorb and store ice-melting salt ions to obtain an adsorption salt, the adsorption salt is dried and crushed to obtain the slow-release salt-melting material, and the slow-release salt-melting material is mixed with slow-breaking emulsified asphalt to obtain the ice-inhibiting fog sealing layer material. The diatomite salt storage material in the ice-inhibiting fog sealing layer absorbs water when being wetted and escapes along with salt, and the demulsification curing time is shorter than that of a pure emulsified asphalt fog sealing layer, so that rapid opening of traffic is facilitated; meanwhile, the diatomite can adsorb the asphalt droplets, a large amount of structural asphalt with a high strength is formed around the asphalt droplets, and the durability of the pure emulsified asphalt fog sealing layer is improved.

Description

technical field [0001] The invention belongs to the field of environmental technology, and in particular relates to a preparation method and application of an ice-fog suppressing sealing layer material. Background technique [0002] The winter climate in the mountainous areas of central and southern my country is characterized by sunny, cold and rainy weather, and roads are prone to freezing in the early morning. The research on the characteristics of this climate shows that the application range of the anti-ice fog seal is very wide, and it is suitable for the winter road conditions of small ice and snow in many areas in the central and southern regions. Because such areas are located in areas with high humidity such as mountainous areas, and the temperature at night in winter is low, it is easy to form a layer of ice film on the road surface when it rains. Common chemical deicing methods not only pollute the environment, but also waste deicing agent too much. Thin ice on...

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Problems solved by technology

[0004] In the same type of anti-icing fog sealing layer, according to the mechanism of anti-icing, some use hydrophobic agent as the main material to add to the emulsified asphalt. The mechanism is to form a special water-resistant structure on the surface of the fog sealing layer (change contact Corner) makes the surface have strong hydrophobic, water-repellent, and waterproof effects. Its disadvantages are that the hydrophobic agent has poor abrasion resistance and poor ice suppression durability; it is composed of ethylene glycol, non-ionic surfactants, and organic macromolecules. The disadvantage of adding antifreeze to emulsified asphalt is that the content of ice-melting substances is small and the number of times of ice-melting is small; there are those who directly add ice-melting salt to high-temperature asphalt, and the disadvantage is that the low-temperature performance of asphalt is significantly reduced and the construction is difficult

[0005] In similar anti-icing and fog sealing layers, it is divided according to the function of added fine materials. Some fine sand is added as a raw material, but the main function of fine sand is to increase the adhesion and friction of the fog sealing layer, which has a great impact on anti-icing. The prolongation of the effect is not beneficial; some nano-titanium dioxide is treated with low surface energy to obtain super-hydrophobic particles, which are compounded with moisture-curing polyurethane to prepare a new type of anti-icing coating. The disadvantage is that the cost is high, and it is suitable for high-grade roads, airports, etc.; There are those who use salt-containing ceramsite to make modified aggregates and add them to cement concrete pavement instead of fine aggregates to suppress pavement freezing. Some use mafion salt to replace part of the asphalt concrete aggregates for pavement. Their disadvantage is that once After the paving is formed, it cannot be replaced, and the amount of salt release cannot be guaranteed in the later stage

The main disadvantage of the existing road ice suppression materials is that the composition is complex, mostly containing organic macromolecules such as esters, amines, alkanes and modifiers, or the granulation process of salt-containing particles is complicated in the early stage