Construction method of highway asphalt pavement

Abstract

The invention relates to a construction method of a highway asphalt pavement with long service life, which is suitable for ensuring highway quality. The construction method comprises the following steps: carrying out initial rolling by using a tyre roller: the tyre roller rolls 2-3 times after a spreading machine, and the temperature of the pavement is 120-150 DEG C in the rolling process; and finishing final rolling by using the steel roller. In order to prevent the material from attaching to the tyres, the temperature of the pavement is kept above 100 DEG C when the tyre roller is used for finishing initial rolling. Since the temperature of the pavement during initial rolling is high and the kneading amplitude of the tyres is high, the weight of the tyre roller can be properly reduced, and the design requirement for pavement compactness can be satisfied only by rolling 2-3 times. The rolling quality of the pavement is determined by temperature. Asphalt in the materials can easily form a thick seal oil film layer on the pavement, thereby preventing the invasion of water, mud and air, being beneficial to preventing the pavement from being damaged by water and enhancing the durability of the pavement.

Description

technical field [0001] The invention relates to a construction method of highway asphalt pavement. Background technique [0002] Asphalt pavement is various types of pavement paved with asphalt materials mixed with mineral materials. Asphalt binder improves the ability of paving aggregates to resist road damage from driving and natural factors, making the road smooth, less dusty, impermeable and durable. Therefore, asphalt pavement is the most widely used high-grade pavement in road construction. [0003] Asphalt binder bonds the mineral aggregates into a whole, increases the strength and enhances the ability of the pavement to resist driving damage, and makes the pavement water-resistant. The asphalt materials suitable for road construction are mainly petroleum asphalt and coal asphalt. [0004] 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: i...

AI Technical Summary

Problems solved by technology

[0009] 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;

[0010] 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;

[0011] 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;

[0012] 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;

[0013] 5. The temperature of the asphalt mixture is low during repressing, and tire marks are not easy to eliminate;

[0014] 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

[0015] The deficiencies of the prior art lead to the unsatisfactory quality of the existing highway asphalt pavement, and the service life of the highway is relatively short