Milling, mixing, paving and compacting method for synchronous paving cold in-place recycling

Abstract

The invention relates to a milling, mixing, paving and compacting method for synchronous paving cold in-place recycling. The method comprises the following steps: (1) milling, crushing and mixing: milling, crushing and mixing a pavement according to a set regeneration depth by adopting a Wirtgen 3800CR / W380CR cold in-place recycling machine; (2) paving: in the paving process, always embedding a spiral feeder in a material storage box into a cold-recycled mixture at a height of not less than 3 / 4 so as to reduce the segregation of the cold-recycled mixture in the paving process, wherein the paving speed is controlled to be 2-4 m / min, and the loose paving coefficient of the cold-recycled mixture is 1.2-1.4; and (3) compacting: compacting the surface of the paved cold regeneration layer by adopting a road roller. The method has the advantages that: one lane can be milled, planed and mixed at a time, then a paver is used for synchronous paving, a compacted regeneration layer can be quickly opened for traffic, and finally a high-quality lower surface layer of the asphalt pavement is obtained.

Description

technical field [0001] The application relates to the technical field of asphalt mixture, in particular to a milling, mixing, paving and compacting method for synchronous paving and in-situ cold regeneration. Background technique [0002] According to the current situation of road construction in my country and according to the design life of asphalt pavement, a considerable proportion of asphalt pavement in my country has entered the period of large and medium maintenance. Traditional maintenance methods have problems such as unreasonable use of old materials, high consumption of pavement materials and energy, etc. , there is an urgent need for a more economical and applicable pavement regeneration technology that can not only maintain the normal operation of the road, but also reasonably dispose of waste pavement materials. Foamed asphalt cold recycling technology has emerged as the times require. [0003] In my country, although the trial application of in-situ cold recycl...

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Problems solved by technology

[0002] According to the current situation of road construction in my country and according to the design life of asphalt pavement, a considerable proportion of asphalt pavement in my country has entered the period of large and medium maintenance. Traditional maintenance methods have problems such as unreasonable use of old materials, high consumption of pavement materials and energy, etc. , there is an urgent need for a more economical and applicable pavement regeneration technology that can not only maintain the normal operation of the road, but also reasonably dispose of waste pavement materials. Foamed asphalt cold recycling technology came into being

[0003] In my country, although the trial application of in-situ cold recycling of foamed asphalt began as early as 2005, and was subsequently promoted and applied in various parts of my country, due to the limitations of equipment and technology, and the immature design method of cold recycled mixture, As a result, the foamed asphalt cold recycled mixture is mainly used in light traffic and low-grade pavement, and is mainly used as a base layer in high-grade roads, while the application of heavy-duty traffic asphalt pavement is still blank, which severely limits the application of this technology. Application and Development

[0004] The traditional cold recycling treatment method is mainly based on the tire-type cold recycling machine. After milling and mixing, it is directly paved on the road, which inevitably produces segregation of the gradation of the recycled mixture; moreover, milling, mixing and spreading The paving is carried out separately, which cannot improve the construction efficiency; in addition, because the traditional process requires a grader to level the surface after paving, this process will again cause segregation on the surface of the regenerated layer, and the surface flatness is also difficult to control

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