High-performance economical asphalt mixture and construction method thereof

Abstract

The invention discloses a high-performance economical asphalt mixture and a construction method, the high-performance economical asphalt mixture is used for preparing a wearing thin layer of a pavement, the wearing thin layer comprises high-viscoelasticity modified asphalt, mineral aggregate and a stabilizer, the asphalt-aggregate ratio of the high-viscoelasticity modified asphalt to the mineral aggregate is 6.0-7.5%, and the stabilizer is 0.3-0.6% of the asphalt mixture; and during construction, the asphalt mixture is paved on a treated base surface and rolled. The paving thickness of the wearing thin layer paved by the asphalt mixture is 1-3cm, so that the wearing thin layer has the advantages of saving cost and resources, and the price of the wearing thin layer is 30% lower than that of similar materials and 50% lower than that of similar product stones; and according to the invention, the consumption of manpower, machinery, fuel and the like is saved in the aspects of stone heating, mixture production, mixture transportation, pavement rolling and the like, the carbon emission is directly reduced by 70%, the pollution is reduced by 50%, and the noise of the specially designed special texture of the paved pavement is reduced by 5-10dB compared with that of the traditional pavement.

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 driving load, but also is affected by the water and temperature environment. Its performance directly affects the safety, smoothness and comfort of driving. Wear layer materials put forward higher requirements. [0003] However, there are some problems in the wearing course of asphalt pavement in my country 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 an...

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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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