Bituminous pavement preventative regeneration and maintenance method

Abstract

The invention provides a bituminous pavement preventative regeneration and maintenance method, comprising the following steps: firstly washing the pavement using water, heating the pavement using microwave to make the pavement clean and dry; spraying the bitumen regenerant on the dry pavement to make the regenerant sufficiently penetrate; heating the pavement using microwave until the pavement can be remolded; compacting and remolding the heated pavement to make the pavement compact and flat. The method is economical, practical, convenient and feasible without destruction of pavement.

Description

technical field [0001] The invention relates to a construction method for pavement maintenance, more specifically a preventive maintenance construction method for asphalt pavement. Background technique [0002] According to relevant statistics, the cost of asphalt concrete pavement accounts for 1 / 4 to 1 / 3 of the total road construction cost, and most of the maintenance funds are used for pavement. There are two main technical and quality problems common to asphalt concrete pavement. One is poor durability. At present, the longest service life of asphalt concrete pavements in China is 8 to 12 years, which is generally shorter than the design service life of 15 to 20 years. Moreover, due to the poor natural environment and operating conditions, some pavements even last 3 to 5 years. In need of a total overhaul. Second, the early damage to the pavement is serious. Some new roads need to be repaired 1 to 3 years after opening, and 6 to 8 years after they have pits, cracks, rut...

AI Technical Summary

Problems solved by technology

One is poor durability. At present, the longest service life of asphalt concrete pavements in China is 8 to 12 years, which is generally shorter than the design service life of 15 to 20 years. Moreover, due to the poor natural environment and operating conditions, some pavements even last 3 to 5 years. In need of a total overhaul

Second, the early damage to the road surface is serious

[0008] 1. Due to the rapid enlargement and severe overloading of vehicles, rutting, especially on heavy lanes, is very serious;

[0009] 2. Due to asphalt aging and insufficient cohesion with aggregates, asphalt spalling, insufficient compaction of asphalt pavement, and large void ratio lead to micro-cracks, cracks, network cracks, looseness, pitting, water seepage, etc.

[0016] At present, the application of asphalt rejuvenator mainly includes: 1. Direct spray method to form a spray layer on the surface of asphalt concrete. Although this method is simple, it cannot achieve a good repair effect. If it is not heat treated, the integrity is not good 1. The damage to the skeleton of the lower layer cannot be repaired, the flatness of the surface is not good, etc.; 2. The original asphalt concrete is broken and added with regenerating agent, and it is regenerated by thermal or cold mixing. This way destroys the road surface