A kind of anti-ultraviolet asphalt and its preparation method and application

Abstract

The invention discloses an anti-ultraviolet asphalt and its preparation method and application. The anti-ultraviolet asphalt is mainly prepared from the following components in parts by weight: 75-85 parts of asphalt, 3-5 parts of modifier, "sandwich 3-5 parts of light shielding agent with "structure, 3-5 parts of auxiliary light shielding agent, 1-3 parts of antioxidant, 1-3 parts of anti-aging agent, 1.5-1.7 parts of ultraviolet absorber, 1-3 parts of free radical scavenger parts, light stabilizer 0.3-0.5 parts. The modified material added in the anti-ultraviolet asphalt has good compatibility with asphalt, and is uniformly dispersed to form a continuous phase protective layer. The double-layer inorganic light covering layer can reflect and scatter ultraviolet rays, reducing the damage of ultraviolet rays to the road surface. The infrared absorption is small, and part of the absorbed ultraviolet rays can be converted into heat energy, so that the road surface has an energy storage function, greatly improving the anti-ultraviolet ability of the asphalt pavement, and prolonging the service life of the road surface.

Description

technical field [0001] The invention relates to the technical field of road asphalt, in particular to an anti-ultraviolet asphalt and its preparation method and application. Background technique [0002] The aging of asphalt is generally divided into thermal aging caused by high temperature and ultraviolet aging caused by ultraviolet radiation contained in sunlight. Photo-oxidative aging is the main cause of long-term aging of asphalt pavements. The energy of ultraviolet rays exceeds C-C, and the bond energy of C-H bond breaks, the weaker chemical bonds inside the asphalt molecules break, and a chemical reaction occurs, which leads to changes in the molecular structure, resulting in a decrease in performance. A large number of condensed ring compounds in asphalt, SBS modifier and other strong ultraviolet absorption ability, photolysis reaction occurs, leading to aging, affecting performance and road life. Asphalt mixture is a black material, and the anti-ultraviolet absorb...

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Problems solved by technology

[0004] Aiming at the problem that the existing asphalt has weak anti-ultraviolet ability, is prone to ultraviolet aging, reduces the anti-temperature cracking and fatigue damage ability of the asphalt pavement, and shortens the service life of the asphalt pavement, the embodiment of the present invention provides a new type of anti-ultraviolet asphalt and its The preparation method and application, the modified material added in the anti-ultraviolet asphalt has good compatibility with the asphalt, and is uniformly dispersed to form a continuous phase protective layer, which can reflect and scatter ultraviolet rays through the double-layer inorganic light covering layer, reducing the damage of ultraviolet rays to the road surface, and The asphalt has little absorption of infrared rays, and can convert the absorbed ultraviolet rays into heat energy, so that the road surface has the function of energy storage

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