A high-performance economical asphalt mixture and its construction method

Abstract

The invention discloses a high-performance and economical asphalt mixture and a construction method, which are used for preparing a wear-resistant thin layer of a road surface, including high-viscoelastic modified asphalt, mineral material, and a stabilizer. The high-viscoelastic modified asphalt and mineral material The asphalt ratio is 6.0-7.5%, and the stabilizer is 0.3-0.6% of the asphalt mixture; during construction, the asphalt mixture is spread on the treated base surface and rolled. The paving thickness of the wear thin layer paved by the asphalt mixture of the present application is 1cm to 3cm, which has the advantages of saving costs and resources, and is 30% lower than the price of similar materials, and saves 50% compared with similar product stones; , mixture production, mixture transportation, road rolling, etc. have saved the consumption of manpower, machinery, fuel, etc., directly reducing carbon emissions by 70%, reducing pollution by 50%, and the specially designed special texture ratio of the paved road Traditional road surfaces reduce noise by 5‑10dB.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a high-performance economical asphalt mixture and a construction method thereof. Background technique [0002] As of 2019, the mileage of expressways in my country has exceeded 140,000 kilometers, of which asphalt roads account for more than 90%. The wear layer of asphalt pavement is the first line of defense to ensure the performance of the pavement. It not only directly bears the traffic load, but also is affected by the water and temperature environment. Its performance directly affects the safety, smoothness and comfort of the road. Wear layer materials put forward higher requirements. [0003] However, at present, there are some problems in the wear layer of asphalt pavement in China: 1. The structural design of the wear layer does not match the functional positioning of the layer, and the contradiction between the design of the excessively thick wear layer and the lack of h...

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Problems solved by technology

[0003] However, there are some problems in the wearing course of asphalt pavement in China at present: 1. The structural design of the wearing course does not match the functional positioning of the layer, and the contradiction between the design of the wearing course that is too thick and the shortage of high-quality stone materials is extremely prominent; 2. Bridges, tunnels The structure design of the pavement is conservative, and the structure of the upper layer of the asphalt in the adjacent subgrade section is excessively accommodated, which not only increases the self-weight of the bridge, limits the choice of later pavement maintenance schemes, but also increases the unnecessary cost of engineering construction, resulting in resources Waste; 3. The contradiction between dense water in the wearing layer and anti-rutting and anti-sliding has not been effectively resolved. High-temperature rutting and water damage occur from time to time, and the problem of insufficient anti-sliding durability has long plagued the road surface management department; 4. Maintenance surface materials such as mist seals, slurry seals, and micro-surfaces have poor durability. Novachip technology for ultra-thin wear layers has been monopolized by foreign material manufacturers for a long time, and the quality of ultra-thin wear layer materials under research is uneven. There is a complete set of supporting construction equipment, and there is no mature and systematic application technology system and norms recognized nationwide

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