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Process for quickly repairing semi-rigid substrate damage of asphalt pavement

A semi-rigid base, asphalt pavement technology, applied in road repair, roads, roads, etc., can solve problems such as repair process defects, long maintenance time, and repair quality that does not meet the requirements of specifications, reducing specific surface area and shortening operation time. , the effect of improving the ability of anti-reflection cracks and pavement deformation

Inactive Publication Date: 2013-07-24
杭州市市政设施监管中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to solve the defects of the current semi-rigid base damage repair process, which is greatly restricted by urban traffic conditions, the repair quality cannot meet the specification requirements, and the maintenance time is long, etc., to provide a rapid repair process for semi-rigid base damage on asphalt pavement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The thickness of the base layer of a secondary arterial road in a city is 40cm, and the road surface is seriously cracked and damaged. Mill the asphalt surface layer and mill the loose base at room temperature, level the road bed, pave 10cm thick gravel, and then pave 30cm large particle size asphalt mixture twice, lay glass fiber grid, and pave coarse grain Type asphalt, open to traffic for 2 days, and finally pave the surface layer of asphalt concrete to complete the rapid repair of the damaged semi-rigid base of the asphalt pavement. After 3 years of use, the current pavement is intact.

Embodiment 2

[0018] The thickness of the base layer of a main road in a city is 45cm, the road surface is severely cracked and damaged, and the deflection value is 1.14mm after testing. Mill the asphalt surface layer and mill the loose base at room temperature, level the road bed, pave 10cm thick gravel, and then pave 35cm large particle size asphalt mixture twice, lay glass fiber grid, and pave coarse grain Type asphalt, open to traffic for 3 days, and finally pave the surface layer of asphalt concrete to complete the rapid repair of the damaged semi-rigid base of the asphalt pavement. The deflection value is 0.34mm after re-testing, which meets the requirements of the specification.

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Abstract

The invention discloses a process for quickly repairing semi-rigid substrate damage of an asphalt pavement, which comprises the following steps: milling and planing an asphalt topping and a loose substrate at normal temperature, leveling a roadbed, spreading gravels having a thickness of 10-20cm, spreading large stone asphalt mixtures of 25-40cm at twice, paving glass fiber grids, spreading coarse graded asphalt, cooling before opening to traffic for 2-3 days, and finally spreading topping asphalt concrete, thus finishing the quick repair of the semi-rigid substrate damage of an asphalt pavement. The invention can resist high plastic and shear deformation and bear heavy-duty traffic action, has fine rutting resistance, improves the high-temperature stability and water stability of the asphalt pavement, and has fine drainability; the on-site construction process is simple and feasible, and the operation time is short; the reflection crack resistance and pavement deformation resistance of the pavement are improved; the bonding property with the asphalt topping is fine, and the pavement structure can be stressed more evenly, thereby having high lasting quality; and by increasing large stone aggregate and reducing powdered ore, the construction cost is lowered.

Description

technical field [0001] The invention relates to the field of urban road maintenance, in particular to a rapid repair process for damaged semi-rigid base of asphalt pavement. Background technique [0002] At present, most urban roads in my country use asphalt pavement. Due to construction technology and economic reasons, semi-rigid base asphalt pavement is the main structural form of asphalt pavement that has been built. However, semi-rigid materials are prone to drying shrinkage cracks and temperature cracks. Due to the existence of cracks, water intrusion into the subgrade is provided. Severe water damage has a great impact on the appearance and durability of the pavement, and the performance of the pavement is also greatly reduced. , coupled with the increase in heavy-duty traffic in recent years, the problem of insufficient deformation resistance of semi-rigid base asphalt concrete pavements has become prominent. After a period of operation, it must be modified to restor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/18E01C23/12
Inventor 方辉王福建陈春雷
Owner 杭州市市政设施监管中心
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