Environment-friendly high-performance long-service-life pavement structure and construction method

Abstract

The invention provides an environment-friendly high-performance long-service-life pavement structure and a construction method, relates to the technical field of highway and municipal engineering, andcan reduce the material consumption, reduce the manufacturing cost, improve the crack resistance and prolong the service life of a pavement. The pavement structure is of a layered structure and sequentially comprises a wearing layer in the thickness of 0.5-3 cm, a bearing layer in the thickness of 8-20 cm and a semi-rigid base layer in the thickness of 32-40 cm from top to bottom. A bonding layerbetween the wearing layer and the bearing layer is a modified emulsified asphalt bonding layer; the wearing layer is any one selected from AC asphalt concrete, SMA asphalt concrete, an OGFC drainagepavement material, a micro-surfacing, an ultra-thin wearing layer and NovaChip; the semi-rigid base layer is a low-crack cement stabilized macadam semi-rigid base layer; and the bearing layer is madeof coarse-grained asphalt concrete and / or medium-grained asphalt concrete. The technical scheme provided by the invention is suitable for the pavement paving process.

Description

【Technical field】 [0001] The invention relates to the technical field of highways and municipal engineering, in particular to an environment-friendly, high-performance and long-life pavement structure and a construction method. 【Background technique】 [0002] Long-life asphalt pavements (Long-life Asphalt Pavements) or permanent pavements (Perpetual Pavements) refer to the use of thicker asphalt layer flexible pavements to reduce the cracking at the bottom of the traditional asphalt layer and avoid structural rutting, so that the damage of the pavement is limited to the top (25 ~l00mm), so only periodic surface milling, overlay repair is required, and no major structural reconstruction of the pavement structure is required during the service life. The design of long-life pavement structure requires consideration of design standard axles, load, tire pressure, maintenance difficulty, construction adaptability, construction speed, safety, durability and reproducibility, and min...

AI Technical Summary

Problems solved by technology

[0006] The existing long-life asphalt pavement structure has a single form and only considers the service life of the pavement structure. Usually, the technical means are to improve the road performance of the mixture or increase the thickness of the structural layer, such as using high-performance SMA mixture instead of AC Mixture, or replace the bottom layer of traditional pavement structure with 6-7cm AC-25 asphalt concrete with 1 or 2 layers of 8-12cm ATB-25 or ATB-30 asphalt stabilized macadam

Although the above measures can effectively prolong the service life of the pavement structure, the engineering cost will increase significantly (for example, when SMA is used as the surface layer, it is necessary to use high-quality basalt and add fiber stabilizers to meet the wear requirements due to the direct bearing of traffic and weather loads. ; increasing the thickness of the asphalt structure layer will significantly increase the project cost), making many projects discouraged from long-life pavement structures

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