Method for repairing crack of asphalt concrete pavement

A technology for asphalt concrete and pavement cracks, which is applied in the field of pavement crack repair. It can solve the problems of insufficient penetration of repair materials, easy aging, and non-environmental protection. It can improve the ability of vehicle load and environmental factors, improve structural strength, and extend The effect of service life

Inactive Publication Date: 2015-04-01
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This material avoids the defects of easy aging, short service life, and environmental protection that exist in hot asphalt, SBS modified asphalt, emulsified asphalt and other materials for repairing, so it can be regarded as a repairing material with superior performance
But at present, in terms of construction methods and equipment, the repairing level of asphalt concrete pavement cracks at home and abroad is relatively low at present, and the repairing effect is poor: small cracks are all treated with direct sealing, which cannot guarantee that the repairing material will fully penetrate into the micro cracks; For large cracks, slotting and filling are used, which still remain at the level of manual cutting, blowing and filling. The construction technology is backward and the repair effect is not good.

Method used

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  • Method for repairing crack of asphalt concrete pavement
  • Method for repairing crack of asphalt concrete pavement
  • Method for repairing crack of asphalt concrete pavement

Examples

Experimental program
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Effect test

Embodiment 1

[0056] For serious structural damage cracks and through cracks such as reflection cracks formed by subgrade settlement and pavement hollowing out, the width is generally more than 5 mm, and drilling pressure grouting is suitable at this time. The repair method of drilling pressure grouting specifically includes the following steps:

[0057] S1: Groove or expand along the direction and shape of the crack to obtain slot 2;

[0058] S2: Remove impurities, debris and loose and broken concrete on the wall surface of slot 2 that affect the bonding effect, and expose a solid wall surface;

[0059] S3: According to the damage condition of the crack, select the drilling point along the slot 2, and drill the hole after the drilling point is determined, and clean the hole 4 and the slot 2 after the hole is drilled;

[0060] S4: install the lower end of the grouting nozzle 1 into the hole 4, the height of the grouting nozzle 1 is higher than the road surface 3;

[0061] S5: filling the ...

Embodiment 2

[0085] For road surface fatigue cracks, temperature cracks and secondary cracks with large width and depth, etc., the width is generally 3-5 mm. At this time, the repair method of slotting and filling is suitable. The method for slotting and filling joints comprises the following steps:

[0086] Step S1: slotting or expanding along the direction and shape of the crack to obtain slot 2;

[0087] Step S2: removing impurities, debris and loose and broken concrete on the wall surface of the slot 2 that affect the bonding effect, exposing a solid wall surface;

[0088] Step S3: According to the damage of the crack, select a drilling point along the slot 2, and perform drilling after the drilling point is determined, and clean the hole 4 and the slot 2 after the hole is drilled;

[0089] Step S4: pouring repair material along the slot 2 until the sealing is completed.

[0090] During the specific repairing process, the pouring of the repairing material can be carried out by using ...

Embodiment 3

[0093] For the initial cracks such as micro cracks at the corners or secondary cracks derived from the main cracks, the width is generally within 3mm and the cracks are relatively shallow. At this time, it is suitable to use the non-destructive filling method. Non-destructive perfusion repair does not need to go through slits and expansions, and specifically includes the following steps:

[0094] Step S1: According to the damage condition of the cracks on the road surface 3, select drilling points along the cracks on the road surface 3, and perform drilling after the drilling points are determined;

[0095] Step S2: cleaning the drilled holes 4 and cracks;

[0096] Step S3: pouring repair material into the crack until the sealing is completed.

[0097] In the specific implementation process, compressed air can be used to blow away the sundries and dust in the cracks when cleaning the cracks, and then the spray gun of the grouting machine can be used to pour repair materials int...

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Abstract

The invention relates to the technical field of repair of a pavement crack, and provides a method for repairing a crack of an asphalt concrete pavement. According to the method, the pouring of the crack is saturated by effectively guiding a repair material through a mode of drilling along the crack of the pavement or along a slit obtained by slotting and crack expansion, so that the adhesive force between the repair material and the pavement is increased, and the structural strength of the repaired crack is enhanced; the adhesion area of an integral structure formed by a self hole and the crack is enlarged, and the connection between the repair material and the pavement is only limited to the upper part of a surface layer, so that the connected relation between the repair material and an original pavement is further consolidated. In conclusion, According to the method disclosed by the invention, the capability of resisting the influence of vehicle loads and environmental factors by the asphalt concrete pavement can be greatly improved, the service life of the asphalt concrete pavement can be prolonged, and the maintenance and repair cost of a highway can be outstandingly reduced.

Description

technical field [0001] The invention relates to the technical field of pavement crack repair, in particular to a method for repairing asphalt concrete pavement cracks. Background technique [0002] With the wide use of asphalt pavement structure in my country's high-grade highways, various early diseases of asphalt pavement gradually appear, such as cracks, ruts, potholes, etc. Among them, cracks are the most common and one of the most important diseases of asphalt pavement. If the micro-cracks are not repaired at the initial stage, the expansion of the cracks will cause the road surface rainwater to penetrate into the roadbed through the cracks, which will seriously weaken the strength and stability of the base layer and cause serious damage to the road surface. Therefore, with the rapid development of highway asphalt pavement in my country, the research on asphalt pavement crack repair technology has a major engineering application demand, which is of great significance fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C23/09
CPCE01C11/005
Inventor 尹健吴昊周爱国周振华李俊田冬梅任海波刘玉莹何凌侠高婷桑正辉胡雄伟熊曜林娜
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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