Premixed foamed asphalt in-situ cold recycling base layer and bottom surface layer construction method

Abstract

The invention relates to the technical field of pavement repair, in particular to a premixed foamed asphalt in-situ cold-recycling base layer and bottom surface layer construction method which comprises the following steps: construction preparation: performing traffic closing on a construction road section, and cleaning a construction pavement through a high-pressure water gun; firstly, cutting two sides of a construction pavement, forming an isolation ditch between the construction pavement and an intact pavement, and cleaning pavement residues in the isolation ditch; preliminarily crushing the construction pavement, and destroying the overall structure of the construction pavement; taking the isolation ditch as a traffic lane, and paving the surface of the construction pavement with regenerated stabilizer, water and filler asphalt; milling a base layer and a bottom surface layer of the construction pavement through a cold recycling machine, mixing the old asphalt aggregate and the mixture together, and re-paving; and leveling the re-paved road surface, performing compaction after leveling is completed, and performing later maintenance. The original damaged pavement material is utilized and regenerated into a semi-flexible base layer at the same time, so that the construction concepts of energy conservation, emission reduction and green roads are met.

Description

technical field [0001] The application relates to the field of pavement repair technology, in particular to a construction method for premixed foamed asphalt in-situ cold regeneration base and bottom surface. Background technique [0002] Highway is an important symbol to measure a country's economic strength and modernization level, and it has an obvious role in promoting national economic and social development. With the rapid development of my country's highway industry, the task of highway maintenance is becoming increasingly arduous. And my country's highway is mainly based on asphalt pavement, and asphalt pavement is widely used in road engineering, from country roads to urban roads, from tertiary roads to expressways, all generally adopt. However, due to the differences in the asphalt concrete material itself, as well as the design, construction and maintenance level and the external environment, the asphalt pavement often has cracks, looseness, subsidence, cracking,...

AI Technical Summary

Problems solved by technology

The inventors found that this process has obvious disadvantages, firstly, the asphalt and other waste materials need to be treated harmlessly, and secondly, it will cost a lot of construction cost to re-pave, which is not in line with the industrial chain of the circular economy model advocated by the state.

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