Asphalt pavement paving method

A technology of asphalt pavement and asphalt surface layer, which is applied in the engineering field, can solve problems such as insufficient bonding strength, achieve the effects of enhanced bonding strength, solving insufficient penetration depth, and good penetration effect

Active Publication Date: 2015-05-13
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect of insufficient bonding strength between the semi-rigid base and the surface layer existing in the road in the prior art, and provide a method that can improve the bonding performance and torsional shear resistance of the asphalt surface layer and the semi-rigid base. Capacity of asphalt road paving method

Method used

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  • Asphalt pavement paving method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The asphalt pavement paving method of this embodiment includes the following steps:

[0018] (1) Transport the mixed cement stabilized crushed stone mixture to the construction site, and use a paver to spread evenly according to the thickness of the loose paving. After paving, shape the mixture immediately. When the moisture content of the mixture is greater than When the specified optimal moisture content (+1%~+2%), immediately roll the mixture until the degree of compaction is greater than the specified degree of compaction (95%), immediately start to keep in good health for 3 days, the specific rolling the way is:

[0019] Use a heavy-duty bulldozer with a dead weight of more than 25t to compact the lower part of the compacted layer, and use a heavy-duty three-wheel roller to continue compacting to make the upper part of the compacted layer compact and smooth, forming a semi-rigid base layer 3.

[0020] (2) Carry out fine milling, cleaning, and removing loose stones on the...

Embodiment 2

[0030] The asphalt pavement paving method of this embodiment includes the following steps:

[0031] (1) The same as Example 1.

[0032] (2) Carry out fine milling, cleaning, and removing loose stones on the semi-rigid base layer 3 that has been well maintained.

[0033] The specific precision milling method is:

[0034] 2.1) Accurately adjust the datum plane, cross slope, and milling depth of the milling machine according to the datum point. The leveler always keeps the normal working state and starts milling. The milling machine runs at a constant speed of 5m / min, and the milling is controlled within the first 10 meters. The milling depth of the planer should be slowly adjusted from zero to the required milling depth of 4mm;

[0035] 2.2) Keep the milling depth at 4mm. When driving at a constant speed to the last 10m, control the milling depth of the milling machine to slowly decrease from 4mm to zero, and perform a strong cleaning on the surface of the semi-rigid base 3 after finishi...

Embodiment 3

[0039] The asphalt pavement paving method of this embodiment includes the following steps:

[0040] (2) Same as Example 1.

[0041] (2) Carry out fine milling, cleaning, and removing loose stones on the semi-rigid base layer 3 that has been well maintained.

[0042] The specific precision milling method is:

[0043] 2.1) Accurately adjust the reference plane, cross slope, and milling depth of the milling machine according to the reference point. The leveling instrument always keeps the normal working state and starts milling. The milling machine runs at a constant speed of 3m / min, and the milling is controlled within the first 10 meters. The milling depth of the planer should be slowly adjusted from zero to the required milling depth of 6mm;

[0044] 2.2) Keep the milling depth at 6mm. When driving at a constant speed to the last 10m, control the milling depth of the milling machine to slowly decrease from 6mm to zero, and perform a strong cleaning on the surface of the semi-rigid base...

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Abstract

The invention relates to an asphalt pavement paving method. Before penetration oil is sprayed, a fine milling process is added, so that the interface structure depth of a semi-rigid base is obviously increased and the bond area is increased, and thus, the friction interlocking between an asphalt covering and the semi-rigid base is improved to a great extent, the anti-shear capacity between the asphalt covering and the semi-rigid base is greatly strengthened, the bonding strength is strengthened and the interlocking friction effect and the bonding action of the asphalt covering and the semi-rigid base are strengthened; and moreover, the penetration oil has a better penetration effect, so that the problem of insufficient penetration depth of the penetration oil is solved and the penetration oil really takes effects of consolidation, stabilization, connection, waterproofness and the like.

Description

Technical field [0001] The invention relates to the field of engineering technology, and is a new road paving method capable of improving the connection state between a semi-rigid base layer and a surface layer. Background technique [0002] The bonding performance between the asphalt surface layer and the semi-rigid base layer directly affects the performance and service life of the road. It can be seen from the core samples taken at the site of asphalt pavement damage that a considerable part of the pavement base layer and the surface layer are completely separated, which directly or indirectly leads to the occurrence of pavement diseases. At present, chemical methods such as spraying permeable oil are mainly used to improve the connection between the asphalt surface layer and the semi-rigid base layer. But only when the permeable layer oil penetrates to a certain depth can it form a firm and stable surface layer of the base layer, and can contribute to the overall connection ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/32
Inventor 张久鹏贾传峰杜群乐李彦伟裴建中
Owner CHANGAN UNIV
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