Pavement crack disposal structure and technology

A pavement crack and structure technology, applied to roads, roads, pavement details, etc., can solve the problems of blocking the mutual bonding between asphalt and aggregate, reducing the bearing capacity of pavement structure, and endangering road performance, so as to improve the performance, The effect of reducing traffic noise and standardizing the structural design of asphalt pavement

Inactive Publication Date: 2016-02-17
JIANGSU SINOROAD ENG TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After Top-Down cracks appear on the asphalt pavement, the bearing capacity of the pavement structure will be reduced accordingly, and the cracks will develop in a "V" shape. The inside of the structure, so the asphalt pavement is quickly damaged by water, blocking the mutual bonding between asphalt and aggregate, because the surface of aggregate has a stronger adsorption force to water than to asphalt, so that the contact between asphalt and aggregate surface The surface is reduced, so that the road surface is loose, peeled, potholes and other diseases, which seriously endanger the performance of the road, and the water will pollute the base layer after flowing to the base layer
At this time, if the generated Top-Down cracks expand, more pavement diseases (potholes, cavities, etc.) will appear

Method used

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  • Pavement crack disposal structure and technology
  • Pavement crack disposal structure and technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] First, adjust the width of the slotting machine tool according to the designed crack slotting width, and debug the equipment to ensure that the equipment works normally; secondly, pre-run the equipment before starting slotting; finally, slot along the crack, according to the designed slotting Groove depth, adjust the depth adjuster to reach the designed depth. When grooving, ensure that the centerline of the grooving is consistent with the centerline of the crack. Whether the crack has been grooved or not, there will be more or less water, dust, debris and sundries in the crack. Ensure that the sealing material has good adhesion to the wall of the crack (or groove), and the wall of the crack (or groove) should be thoroughly cleaned and completely dry. The seam cleaning method generally uses compressed air blowing, sandblasting, wire brushing, and high-pressure water spraying. Opening a groove along the crack is mainly to provide a sufficient space for the crack that is...

Embodiment 2

[0024] According to the method of Example 1, the pavement crack treatment process of the present invention is applied to a certain expressway K636+785-K637+885. The test section is about 8m long, and grooves are made at 0.4cm on both sides of the crack, and then filled with high-permeability Epoxy resin material, after fine milling, add 2.5cm thick U-Pave10 asphalt mixture to complete the repair.

Embodiment 3

[0026] According to the method of Example 1, the pavement crack treatment process of the present invention is applied to a certain expressway K636+785~K637+885. The test section is about 10m long, and grooves are made at 0.5cm on both sides of the crack, and then filled with high-permeability Epoxy resin material, after fine milling, add 2.5cm thick U-Pave10 asphalt mixture to complete the repair.

[0027] Various performance indicators of different mixture types

[0028]

[0029]Through the comparison and analysis of previous data, it is found that the high temperature resistance of U-Pave10 asphalt mixture is particularly outstanding, and the water damage resistance and low temperature crack resistance are basically equivalent to SMA. After U-Pave adopts integrated paving construction, the lower layer on the pavement forms a whole, and the anti-fatigue performance is significantly enhanced. Tracking and monitoring data from the test road show that the construction depth ...

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Abstract

The invention discloses a pavement crack disposal structure and technology. The technology comprises operation steps as follows: slotting is performed on two sides of a pavement crack of a lower surface layer in the crack direction, then crack pouring is performed, a crack pouring material is a high-permeability epoxy resin material, fine milling is performed after high-permeability epoxy resin is cured, and a repair overlay is backfilled. The repair overlay is a U-Pave (Ultra-thin asphalt pavement) and adopts an integrated spreading and paving construction technology, so that upper and lower surface layers of a pavement form a whole, and the anti-fatigue performance is significantly enhanced. Test pavement tracking and monitoring data indicate that the structure depth of the U-Pave10 is slightly smaller than SMA (stone mastic asphalt) in the initial period after completion, however, attenuation resistance is higher during long-term usage, the longer the time is, the more obvious the advantages are, besides, the traffic noise of a U-Pave10 pavement is reduced by 1-2 db according to on-site inspection, and the driving comfort is improved.

Description

technical field [0001] The invention relates to a repair technology for road surface cracks, in particular to a road surface crack treatment structure and its technology. Background technique [0002] Top-Down fatigue cracks in asphalt pavement are one of the damage forms of flexible base pavement. Under the stress caused by temperature and climate and repeated traffic load, the initial microscopic cracks in asphalt pavement will continue to produce new cracks. lead to damage to the overall pavement structure. The fatigue cracks of Top-Down may be only local cracks at the beginning. Under the repeated action of rainwater and temperature traffic loads, these cracks will form new pavement cracks and potholes, causing damage to the pavement, making the pavement service ability and road use Performance drops. [0003] Top-Down cracks mainly have three forms and two causes: transverse cracks, longitudinal cracks and network cracks; load type and non-load type, transverse cracks...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/35
CPCE01C7/35E01C11/005
Inventor 耿磊关永胜周文费燕华
Owner JIANGSU SINOROAD ENG TECH RES INST CO LTD
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