Preparation method of epoxy asphalt road surface materials

Abstract

The invention relates to a preparation method of modified asphalt, in particular to modified asphalt which is used on the road surface, belonging to the technical field of chemical materials. The invention has the beneficial effects of easy operation, low cost, low energy consumption and short solidification time, thus shortening traffic closing time and being beneficial for rapid and smooth traffic. The epoxy asphalt road surface materials prepared by the method in the invention feature high elongation; the anti-fatigue life is 10 to 30 times of that of ordinary asphalt under the action of equal fatigue stress; the epoxy asphalt road surface materials have good deformation ability and durability, have dramatic effects in preventing tracking under high temperature, resisting cracks under low temperature and resisting water damage in the rainy season and have good anti-fatigue property.

Description

technical field [0001] The invention relates to a method for preparing modified asphalt, in particular to a method for preparing modified asphalt for road surfaces, and belongs to the technical field of composite asphalt materials. Background technique [0002] Asphalt is neither a complete viscous liquid nor a complete solid elastic body, but a typical viscoelastic body. Asphalt is thermoplastic, that is, viscosity dominates at high temperatures, making it fluid; at low temperatures, elasticity dominates, making it resistant to flow. Therefore, asphalt-paved roads are prone to rutting under heavy loads during the high temperature season in summer, and shrinkage cracks are prone to appear on the pavement during the cold winter season. This reversible property greatly limits the application range of asphalt. As a result, bitumen must be modified to change ordinary thermoplastic bitumen into thermoset bitumen. [0003] The research and development and application of modifie...

AI Technical Summary

Problems solved by technology

The applicant searched and found that the Chinese patent application with the application date of April 28, 2006, the application number 200610039988.8, and the name "thermosetting epoxy asphalt material for road and bridge and its preparation method" discloses an epoxy asphalt material and its The preparation method of the material is obtained by reacting the epoxy resin of component A and component B in a mass ratio of 2:1-8:1, wherein the raw material of component A needs to be modified asphalt with carboxyl group or acid anhydride group, There are many raw materials for aliphatic dibasic acid, dimer acid or alkyd resin, fatty acid anhydride, and curing accelerator. When preparing, it is necessary to modify the asphalt in component A first, then raise the temperature to 140-160°C, and then add The remaining components heated to 140-160°C form component A, and then mix with component B to obtain the product. There are many steps in the whole preparation process and the reaction time is long, especially the nitrogen filling, vacuuming, Steps such as mechanical dispersion not only have many types of raw materials, but also high reaction temperature and high energy consumption; because the raw materials contain aliphatic epoxy resin (mostly water-based epoxy resin) after synthesis, the epoxy asphalt prepared after use Water stability is poor, and there is no explanation for the water stability test in the patent application

An application date similar to it is April 22, 2008, the application number is 200810023956.8, and the name is "Epoxy Asphalt Material for Road and Bridge and Its Green Preparation Method", which also requires the above multiple raw materials and tedious preparation process. High cost and high energy consumption

[0004] The modified asphalt of the above prior art is difficult to meet the needs of modern road construction due to the variety of raw materials, complicated preparation process and poor water stability during road construction, which is labor-intensive and time-consuming

Images