A road construction method for in-situ cold regeneration of asphalt pavement

Abstract

The invention relates to a road construction method for on-site cold regeneration of asphalt pavement, comprising 1) construction preparation; 2) preparing new aggregate and composite slurry according to the quality of the old asphalt pavement milling material; 3) premixing the new aggregate: Mix the new aggregate and compound slurry evenly to make wet aggregate; milling and mixing: mill the old asphalt pavement according to the designed milling depth, spray the compound slurry into the milling material of the old asphalt pavement, and spread the wet aggregate In-situ mixing and regeneration; 4) Initial pressure shaping: perform initial pressure on the regeneration operation surface, and flat ground shaping; 5) Pouring composite slurry: pour composite slurry on the initial pressure operation surface, and vibrate rolling to infiltrate; 6 ) rolling forming; 7) health preservation. This road construction method does not need to spread cement, mineral powder, etc. on the working surface, the loss of raw materials is small, the utilization rate of milling materials and external raw materials is high, and the degree of mechanization of in-situ cold regeneration is higher; the obtained regeneration layer has low porosity and structure. Dense, fast early strength development, high quality stability.

Description

technical field [0001] The invention belongs to the technical field of road construction, and in particular relates to a road construction method for in-situ cold regeneration of asphalt pavement. Background technique [0002] my country's infrastructure construction and transportation industry have experienced a stage of rapid development in full swing. High-grade road construction mostly uses asphalt pavement, which has the advantages of safe driving, smooth and comfortable, and low noise. However, the service life of asphalt pavement is usually 10-15 years, and more and more asphalt roads built in the early stage have entered the period of overhaul, renovation and reconstruction, or need to be rebuilt and expanded. During this process, the old asphalt pavement is milled, which produces a large amount of solid waste, which is difficult to dispose of. Not only the transportation cost is high, the floor space is large, but also resources are wasted; how to mill a large amoun...

AI Technical Summary

Problems solved by technology

However, pre-spreading new materials (including cement, mineral materials, etc.) Harsh environment, material loss and uneven paving will also cause the composition of the mixture to deviate from the design, resulting in unstable quality and reduced strength of the recycled layer, which is not conducive to the durability of the recycled structural layer

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