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Construction method for restoring surface structure and cracks on asphalt pavement

A technology of asphalt pavement and surface structure, which is applied in the field of road rolling, which can solve the problems of obstructing traffic, slow construction period, and stone consumption, and achieve the effects of less interference, improved anti-skid performance, and increased surface structure depth

Inactive Publication Date: 2013-04-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding a layer of asphalt mixture not only consumes stone materials, but also slows down the construction period and hinders traffic.

Method used

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  • Construction method for restoring surface structure and cracks on asphalt pavement
  • Construction method for restoring surface structure and cracks on asphalt pavement
  • Construction method for restoring surface structure and cracks on asphalt pavement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Five years after the asphalt pavement of an expressway was opened to traffic, the pavement surface was smooth. The structural depth and lateral force coefficient of the pavement surface were measured according to the method stipulated in the "On-site Test Regulations for Highway Subgrade Pavement" (JTG E60-2008). The results are shown in Table 1. Also, the pavement has more surface cracks. Select a 2km long road section, apply the hot-spur rolling equipment and construction technology of the present invention to repair the surface structure of the asphalt pavement, and fill up the surface cracks at the same time.

[0024] First, traffic in the pending lane is closed. Use an emulsified asphalt sprinkler to evenly spread 0.2kg / m on the dry and clean asphalt road surface 2 emulsified asphalt. After the emulsified asphalt is demulsified, hot-spur rolling begins.

[0025] Heat the rolling wheel 30 minutes in advance so that the temperature of its surface is 120°C, and sta...

Embodiment 2

[0032] On the same expressway as in Example 1, select a 2km long road section adjacent to Example 1, and apply the hot-spur rolling equipment and construction technology of the present invention to repair the surface structure of the asphalt pavement and fill up the surface cracks simultaneously.

[0033] First, traffic in the pending lane is closed. Use an emulsified asphalt sprinkler to evenly spread 1.0kg / m on the dry and clean asphalt road surface 2 emulsified asphalt. After the emulsified asphalt is demulsified, hot-spur rolling begins.

[0034] Heat the rolling wheel 50 minutes in advance so that the surface temperature is 180°C, and start rolling. The rolling speed is 6km / h. 10 minutes after the end of the rolling, the road surface temperature drops below 60°C, and the vehicle traffic will resume.

[0035] A heating device is arranged inside the rolling wheel adopted. The heating device is a ZYR-50 gas-fired air heater produced by Shanghai Maolu Electric Co., Ltd.,...

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Abstract

The invention discloses a construction method for restoring a surface structure and cracks on an asphalt pavement. The construction method comprises the following steps of: (1) uniformly scattering 0.2 kg / m<2> to 1.0 kg / m<2> of emulsified asphalt on the dried and clean asphalt pavement by an emulsified asphalt scattering truck, and turning to the step (2) after the emulsified asphalt is demulsified; (2) heating rolling wheels in advance so that the temperature on the surfaces of the rolling wheel is 120 to 180 DEG C, wherein the rolling speed is 2 to 6 km / h, and the surfaces of the rolling wheels are provided with steel stabs; and (3) after rolling is finished, and the surface temperature of the pavement is reduced to below 60 DEG C, recovering vehicle traffic. By the construction method, the cracks on the pavement surface are closed, and the surface structure depth is increased; and therefore, the antiskid performance of the pavement is improved. Compared with the conventional technology for adding a 'cover surface' and 'a micro surface place' of a layer of asphalt admixture on the conventional pavement, the construction method has the advantages that stone resources are not consumed; the construction speed is high; and the traffic interference is low.

Description

technical field [0001] The invention relates to the technical field of road rolling, in particular to the construction of repairing the surface structure and cracks of asphalt pavement by hot-spur rolling. Background technique [0002] After the asphalt pavement has been used for a period of time, smooth and cracked diseases appear on the surface. Spraying a certain dose of emulsified asphalt on the surface, that is, "fog seal layer", is a commonly used technical measure to treat surface cracks, with low cost and fast speed. However, this process reduces the surface friction coefficient, making the road smoother and threatening driving safety. The existing methods deal with the smoothness and cracks of asphalt pavement surface at the same time, mainly laying an additional layer of asphalt mixture on the original pavement, such as the "overlay" of hot-mix asphalt mixture and the "micro-surfacing" of emulsified asphalt cold-mix mixture wait. However, laying an additional la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C23/09
Inventor 葛折圣
Owner SOUTH CHINA UNIV OF TECH
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