A high-strength composite structural layer for anti-rutting and its preparation method

Abstract

The invention discloses a high-strength composite structural layer for anti-rutting and a preparation method thereof. The composite structural layer is, from bottom to top, an exposed stone layer arranged on a cement stabilized crushed stone base, a lower layer of high-ductility MMA resin bonding layer, and a lower layer of reinforcement Reinforced structural layer, middle high-strength MMA resin bonding layer, middle graded gravel, middle reinforced structural layer, upper high-strength MMA resin bonding layer, upper graded crushed stone, upper wear layer. The pavement structure designed by the present invention is composed of a stable interlocking system between layers, a high-strength structural layer and an easy-to-maintain wear layer. The overall thickness of the composite structure is thin, light in weight, and excellent in coordination. The high-strength structural layer has excellent High-temperature deformation resistance, can effectively inhibit vertical and lateral shear deformation, and has good low-temperature cracking resistance, fatigue resistance and water stability. At the same time, the preparation method of the composite structure layer is highly mechanized, and the construction temperature requirements are relaxed. Strong feasibility, simple operation, easy maintenance and easy promotion.

Description

technical field [0001] The invention belongs to the field of road engineering, and relates to an asphalt pavement composite structural layer and a preparation method thereof, in particular to a high-strength composite structural layer with outstanding anti-rutting performance, taking into account low-temperature cracking resistance, fatigue resistance, skid resistance and water stability, and its Preparation. Background technique [0002] Asphalt pavement is the main structural form of high-grade road pavement in my country, accounting for more than 85% of the total number of pavements that have been built. According to the "2016 China Highway Maintenance Market Survey Report" issued by the National Bureau of Statistics, in the early stages of use, asphalt pavement in my country is prone to rutting, which rapidly reduces the level of road service. Because traditional asphalt pavement materials and structures are difficult to resist high temperature and heavy loads, the posi...

AI Technical Summary

Problems solved by technology

[0004] At present, research on asphalt pavement rutting mainly focuses on unstable rutting, usually using three methods: optimizing the performance of modified asphalt, adjusting the gradation of asphalt mixture, and adding anti-rutting agents. Relatively speaking, due to the optimization of modified asphalt Usually, polymer modified or hard asphalt is used. Compared with ordinary modified asphalt, the optimization effect is not significant and the cost is high. At the same time, adjusting the grading of asphalt mixture has a limited effect on improving the anti-rutting deformation ability of the mixture. There are relatively many applications of adding anti-rutting agents to the mixture

However, in China, due to the large number of heavy-duty vehicles, the hot service environment, and the lack of theoretical calculation methods for anti-rutting requirements for the design and evaluation of asphalt pavement structural layers, simply using one or more of the above three methods is often too complex. It cannot meet the use requirements of anti-rutting disease, which seriously affects the quality and service life of the asphalt pavement structure

Images