Anti-rut high-strength composite structure layer and preparation method thereof

Abstract

The invention discloses an anti-rut high-strength composite structure layer and a preparation method thereof. A composite structure layer sequentially comprises an exposed stone layer, a lower high-ductility MMA resin bonding layer, a lower reinforced reinforcing structure layer, a middle high-strength MMA resin bonding layer, a middle graded broken stone, a middle reinforced reinforcing structurelayer, an upper high-strength MMA resin bonding layer, an upper graded broken stone and an upper wearing layer which are arranged on the cement stabilized macadam base layer from bottom to top. A pavement structure designed by the invention is composed of an interlayer stable interlocking system, a high-strength structural layer and an easy-to-maintain wearing layer; the composite structure is thin in overall thickness, light in weight and excellent in coordination; the high-strength structure layer has excellent high-temperature deformation resistance, vertical and lateral shear deformationcan be effectively inhibited, and the high-strength structure layer has good low-temperature cracking resistance, fatigue resistance and water stability. Meanwhile, the preparation method of the composite structure layer is high in mechanization degree, loose in construction temperature requirement, high in feasibility, easy to operate, convenient to maintain and easy to popularize.

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

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