Construction method of premixed foamed asphalt base and bottom layer with cold recycling in situ

Abstract

This application relates to the field of pavement restoration technology, in particular to a construction method for in-situ cold regeneration of premixed foamed asphalt base and bottom surface layer, including the following steps: construction preparation, traffic closure of the construction road section, and cleaning of the construction road surface with high-pressure water guns; First cut both sides of the construction road surface, form an isolation ditch between the construction road surface and the intact road surface, and clean up the road residue in the isolation ditch; carry out preliminary crushing on the construction road surface to destroy the overall structure of the construction road surface; Recycled stabilizer, water and filler asphalt are paved on the surface of the construction pavement; the base and subsurface layers of the construction pavement are milled through a cold recycling machine, the old asphalt aggregate and mixture are mixed together, and paving is carried out again; The re-paved road surface shall be leveled, compacted after leveling, and then maintained. While using the original damaged pavement materials, it is also regenerated into a semi-flexible base, which is in line with the construction concept of energy saving, emission reduction and green road.

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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