Partial eduction treatment method for asphalt pavement of highway

Abstract

A highway asphalt pavement local segregation method includes: determining the area of road to separating, cleaning, preparing cement pulp, bottling, removing the laitance, conservation, cleaning pavement. Said cement pulp is prepared by cement, water and cement pulp additive with the rate of 100:50 ~68:3.1~6.2 and said cement pulp additive is prepared by wetting agent or penetrating agent and mortar additive or dehydragent with the ratio of 2.5~5.0:0.6~1.2. After a number of laboratory studies and on-site construction experiments, the water percolation rate of disposed asphalt pavement is zero, the hydrodynamic stability and the anti-pressure ability is enhanced significantly according the invention to disposing highway asphalt pavement local segregation. These show that the invention is an effective method to disposing the highway asphalt pavement local segregation. The invention has many advantages such as design reasonable, construction simple, operation easy, construction performance significant, pavement performance fine after disposed; the invention can be used to disposing the segregation disease of asphalt pavement.

Description

technical field [0001] The invention belongs to the technical field of methods for repairing asphalt pavement, and in particular relates to a method for treating segregation diseases of asphalt pavement and materials used. Background technique [0002] With the wide application of asphalt pavement structure in high-grade highways, the problems of its durability and early damage of pavement structure have become increasingly prominent. The survey found that many expressways have been open to traffic for one to two years, and some even less than one year, more or less There are a large number of damage phenomena such as pitting, looseness, falling grains, pumping, pits, and network cracks in the asphalt surface layer. These early diseases are more or less related to water, and most of the water damage is due to pavement segregation. It is easy to penetrate into the internal void of asphalt pavement. Asphalt pavement segregation refers to the deviation of mixture gradation, as...

AI Technical Summary

Problems solved by technology

[0005] At present, when the segregation disease occurs on the asphalt pavement, if the segregation disease is not very serious, the treatment method usually adopted in the construction process is to artificially finely screen the stone chips, mix the sieved fine stone chips with asphalt, and spread them on the asphalt pavement The segregation disease area of ​​the asphalt pavement should be rolled in time with a road roller. This treatment method can only alleviate the surface segregation disease of the asphalt pavement, and cannot treat the segregation disease that occurs in the deep layer of the asphalt pavement.

If the segregation disease is serious, the treatment method adopted is to delineate the segregation disease area and eradicate it, and re-pave the asphalt mixture. This method not only wastes manpower and material resources, but also prolongs the construction period.