A thin-layer overlay construction method suitable for major and medium repairs and preventive maintenance of road surfaces

Abstract

The present invention provides a thin layer overlaying surface construction method suitable for pavement overhaul and intermediate maintenance and preventive conservation, a synchronous construction process meeting the thin layer overlaying surface technology can be formulated by adjusting and upgrading on the basis of the traditional ultra-thin wearing layer construction process according to the characteristic of a thin layer overlaying surface, especially an extremely-thin wearing layer with the thickness of 0.8 to 1.5cm, the thin layer overlaying surface construction method mainly includes preparation before construction, original pavement disease damage treatment, fine milling napping processing, milling process knife head cooling water spray control, pavement cleaning, mixture mixing, mixture transportation, mixture paving, mixture rolling compaction, detection after forming and opening to traffic, the construction process conditions are clever and flexible to control, by the process using a fine milling machine for processing an old subgrade surface and emulsified asphalt and mixture synchronous paving, construction of the thin layer overlaying surface especially the extremely-thin wearing layer can be effectively realized, the major technical indicators of the constructed extremely-thin wearing layer are equivalent to that of an ultra-thin layer with the thickness of 20mm abroad, the cost is reduced by 25%, and a contribution is made for popularization and application.

Description

technical field [0001] The invention relates to the technical field of pavement restoration, in particular to a thin-layer overlay construction method suitable for overhaul and preventive maintenance of pavement, which can realize the construction of an extremely thin wearing layer with a thickness of 0.8 to 1.5 cm. Background technique [0002] The hot-mix asphalt ultra-thin wear layer technology was first applied in France in 1988. It is mainly used for the surface layer of new pavement and the maintenance of old pavement. After France, other countries such as Britain, Poland, and Sweden also carried out this project Technology research has been applied in Europe for more than 20 years. This technology was introduced to the United States in 1992. As of 2013, the application area has exceeded 10 million square meters per year. 2 . Most of the projects are high-grade highways with super-heavy traffic load, which fully demonstrates its excellent road performance and outstand...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a thin-layer overlay construction method utilizing modified asphalt and its mixture, starting from the original road surface treatment, paving and rolling technology and interlayer bonding, etc., to study the existing application The ultra-thin wearing layer technology has been thoroughly studied and improved to overcome the defects of the original ultra-thin wearing layer construction technology after paving, which is often due to poor bonding with the old pavement layer, easy to fall off, drop grains and poor durability after passing; at the same time, it is 0.8~ The 1.5cm thick ultra-thin wear layer technology provides matching construction technology, which makes the technical advantages of the ultra-thin wear layer more prominent

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