Multi-level precise surface treatment preventive maintenance method

Abstract

The invention discloses a multi-level preventive maintenance method for fine surfacing. The method comprises the following steps of treating a to-be-cured pavement base surface, spreading curing agentas a bottom layer, spreading a first layer of resin liquid asphalt and gravels on the bottom layer at the same time, carrying out primary rolling compaction, spreading a second layer of resin liquidasphalt, carrying out secondary rolling compaction, finally spraying wear-resistant agent, curing for 0.5-1 hour, and opening. The maintenance method is advantaged in that a four-in-one maintenance mode is adopted, the thickness of formed fine surface curing molding is 0.3-0.6 cm, the method can be used for maintaining skid resistance of the existing pavement, improving driving conditions of the original pavement, improving the skid resistance, repairing slight cracks, improving a friction coefficient BPN of the original pavement to be more than or equal to 55, reducing the water permeabilitycoefficient to be 0 ml / min, prolonging the service life of the original pavement and greatly reducing maintenance cost of the pavement with insufficient skid resistance; conventional construction equipment is adopted, so large-scale popularization and application are facilitated.

Description

technical field [0001] The invention belongs to the field of pavement maintenance, and in particular relates to a preventive maintenance method for multi-level fine surfaces. Background technique [0002] The fine surface is a method of spraying epoxy asphalt pavement maintenance agent evenly on the asphalt pavement with professional mechanical equipment when the original pavement structure strength is large enough and the driving quality is good. A series of physical and chemical reactions with the old pavement to form a protective layer with a spatial network structure is one of the most effective preventive maintenance technologies today. [0003] Asphalt pavement is more and more widely used in the construction of highways and urban roads because of its good anti-skid performance, comfortable driving, low noise, and easy maintenance. In recent years, with the rapid increase of traffic flow, and affected by design, construction, materials, climate, etc., the pavement has...

AI Technical Summary

Problems solved by technology

Although these road surface preventive maintenance technologies can meet the basic functional requirements, they have the following disadvantages: insufficient interlayer adhesion can easily cause flakes to fall off, and the seal layer containing sand mist has weak functionality and short service life; the slurry seal The noise of the layer and the micro-surface is high, and the noise of the gravel seal layer is large, and flying stones are easy to be generated, which affects driving safety; Novachip ultra-thin wear layer requires special construction equipment, and the cost is high

[0005] The publication number is CN107299586A, and the invention titled "A Pre-maintenance Method for Asphalt Pavement with Low-noise and Anti-skid Function" discloses a method of synchronously or asynchronously spreading adhesive materials, anti-skid and noise-reducing aggregates, adhesive However, the modified emulsified asphalt used in this process is slow to demulsify and takes a long time to maintain. It needs to be open to traffic about 2-4 hours after construction, which affects construction efficiency.

Wu Xiangyan reported in "The Mechanism and Construction Technology of Asphalt Pavement Fine Surface Treatment Technology" that the epoxy-modified asphalt was uniformly sprayed as a road maintenance agent on the asphalt pavement with special fine surface treatment equipment, and a layer of special fine surface treatment agent was spread on the asphalt pavement. Sand, through a series of physical and chemical reactions between the material and the old pavement, forms a protective layer with a spatial network structure, but this technology must use a special fine surface during construction, which is not conducive to large-scale promotion

The publication number is CN108103875A, and the invention titled "anti-slip gravel seal pavement and construction method" discloses a gravel seal comprising basalt gravel between the emulsified asphalt of the upper layer, the emulsified asphalt of the lower layer and the emulsified asphalt of the second layer, but This technology needs to sieve basalt crushed stone in a mixing plant and pre-mix it with base asphalt. It needs an asphalt mixing plant at the construction site, and the emulsified asphalt used is SBS modified emulsified asphalt, which is bonded with the original road surface. Poor force, short service life

The invention with the publication number CN201610535117.9 and titled "A Surface Treatment Method for Low-Noise and Anti-skid Pavement" discloses a special "five-in-one" construction vehicle for interlayer resin liquid asphalt, modified Emulsified asphalt, anti-skid and noise-reducing materials, modified emulsified asphalt, and wear-resistant agent are sprayed in sequence and at one time to form an ultra-thin overlay structure layer of 2-9mm on the highway pavement. However, this method requires integrated construction equipment and cannot Large-scale promotion and application of big laws

[0006] In view of the above-mentioned existing anti-skid pavement surface treatment technology that requires special construction equipment, or the crushed stone needs to be pre-mixed in a mixing plant, has poor adhesion to the original pavement, and insufficient durability, it is urgent to research and develop a new one. A new type of maintenance method for fine surface

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