Ultra-thin asphalt wearing layer structure and construction method thereof

Abstract

The invention discloses an ultra-thin asphalt wearing layer structure. The structure comprises an ultra-thin asphalt wearing layer, a bonding layer and a pavement from the upper part to the lower partin sequence, wherein the bonding layer is arranged in a gap at the lower part of the ultra-thin asphalt wearing layer in an embedded extruding manner; the thickness of the ultra-thin asphalt wearinglayer is 8 to 12 mm. The formed ultra-thin asphalt wearing layer is bonded with the pavement in the lower layer through hot asphalt at the bottom to form a firm whole body, and poor integrality and delaminating risks caused by thin layers are eliminated. The ultra-thin asphalt wearing layer structure belongs to a novel technology for preventive maintenance of asphalt pavements; after an asphalt pavement is subjected to a quantity of years of traffic use, surface function problems, such as degenerative skid resistance function, poor flatness, big noise and slight pit slots, occur, and the structure can rapidly, simply and effectively repair surface functions of the asphalt pavement at low cost, and prevent further occurrence of diseases. The invention further discloses a construction methodof the ultra-thin asphalt wearing layer structure.

Description

technical field [0001] The invention relates to the field of highway high-grade pavement engineering, in particular to an extremely thin asphalt wear layer structure and a construction method thereof. Background technique [0002] Highway preventive maintenance refers to a maintenance measure taken to restore the surface service function surface when the pavement structure strength is sufficient and only the surface function is attenuated. It is a maintenance method to keep the road system in good condition for a longer period of time, delay future damage, and improve the functional condition of the road system without increasing the structural bearing capacity. It is relative to corrective maintenance, which is a maintenance operation for diseases that have occurred. The concept of road preventive maintenance was put forward by the United States in the 1980s. Its basic starting point is to delay the development of road surface diseases through early maintenance, thereby de...

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Problems solved by technology

[0005] Disadvantages of using traditional techniques: The main purpose of conventional fog seal maintenance is to prevent the further development of water damage by spraying emulsified asphalt seal, which does not have the effect of repairing the surface of the pavement

In the asphalt overlay with a thickness of less than 2cm, the use of emulsified asphalt as the adhesive layer material has the following disadvantages: 1. The performance of emulsified asphalt is inferior to that of hot asphalt, and its cohesive force is not as good as that of hot asphalt. The overall performance of the road is poor.

2. Emulsified asphalt is not conducive to project quality

The bad consequence is that the volatilization of water in the emulsified asphalt must consume the heat energy of the hot mix asphalt mixture, so that the temperature of the hot mix asphalt mixture drops too fast, which is very unfavorable to the compaction of the mixture, especially when the thickness drops to about 1cm. ultra thin layer

At the same time, there is still a small part of water that is inevitably too late to volatilize, and it exists in the sticky layer, which will also cause adverse effects on the bonding between the new pavement and the original road surface

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