Construction method of highway asphalt pavement by adopting tire initial pressing process

Abstract

The invention relates to a construction method of a highway asphalt pavement by adopting a tire initial pressing process. The method comprises the following steps that A, an adopted asphalt mixture comprises coarse aggregate, fine aggregate and asphalt, and the particle size of coarse aggregated rock in the coarse aggregate corresponds to the thickness of the asphalt pavement after construction; and B, a pneumatic tyred roller is adopted for initial pressing, that is, a paver paves the asphalt mixture on the roadbed, and the pneumatic tyred roller rolls after following the paver. After initialpressing is completed 2-3 times in a reciprocating manner, a steel cylinder road roller is adopted for final pressing. The top surfaces of the coarse aggregated rock directly form a road surface, andgaps between the adjacent coarse aggregated rock are filled with the fine aggregate. In the highway use process, the top surface of the coarse aggregated rock is directly rubbed with vehicle tires, and the aggregated rock hardness is far higher than that of the tires, so that the pavement is durable and wear-resistant; and meanwhile, the coarse aggregated rock is fixed on the hard roadbed and does not have a space for moving up and down, so that the compaction force and the bearing capacity of the whole pavement are relatively high and are far higher than those of an asphalt pavement in the prior art.

Description

technical field [0001] The invention relates to a construction method of highway asphalt pavement adopting tire initial pressure technology. Background technique [0002] The asphalt mixture is paved on the road surface by a paver, and then the road surface is compacted by a road roller; the road surface compaction is divided into three stages: initial pressure, re-pressure, and final pressure. The discharge temperature of the treatment of the paver is generally 130-150°C. [0003] The purpose of initial pressure is to level and stabilize the mixture and create conditions for re-pressure. The initial compaction should be rolled immediately after the paver, and the length of the initial compaction zone should be kept short, so as to quickly compact the surface and reduce heat loss. The initial compaction is the basis of compacting asphalt mixture. In the prior art, light steel drum rollers or vibratory rollers with vibration devices closed (both are steel wheel rollers) are...

AI Technical Summary

Problems solved by technology

[0007] 1. Steel wheels are used for the initial pressure to compact the road surface, and a large amount of water is sprinkled at the same time, resulting in temperature loss;

[0008] 2. When tires are used for repressing, the temperature of the asphalt mixture is low, which can easily cause the asphalt mixture to stick to the tire tread; it is necessary to use diesel to clean the tires, which takes time and effort and wastes diesel;

[0009] 3. The steel wheel will cause the asphalt mixture to move during the initial pressure, and horizontal ridges are easy to form at the turning back, resulting in insufficient road surface smoothness;

[0010] 4. There is vibration when the steel wheel rolls the road surface, which leads to the basic formation of the road surface. When repressing, the rubbing effect brought by the tire is small, and the rubbing effect of the tire cannot be exerted, resulting in the compactness of the road surface not meeting the design requirements;

[0011] 5. The temperature of the asphalt mixture is low during repressing, and tire marks are not easy to eliminate;

[0012] 6. The temperature of the asphalt mixture is low during repressing, and it is not easy to form a sealing oil film on the road surface

Its shortcoming is that the type of asphalt mixture used and the particle size selection of coarse aggregate have a great influence on the compaction force and bearing capacity of the road surface.

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