Reflection crack resistant asphalt pavement structure and construction method thereof

A technology of asphalt pavement and construction method, which is applied in the direction of roads, roads, on-site paved cohesive pavements, etc., can solve the problems of semi-rigid base reflective cracks, etc., to reduce generation and development, delay generation and development, and improve structural strength Effect

Active Publication Date: 2015-11-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects and deficiencies of the semi-rigid base of the existing pavement structure, which are prone to reflective cracks, the purpose of the present invention is to provide an anti-reflective crack asphalt pavement structure, which has an excellent effect of resisting reflective cracks

Method used

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  • Reflection crack resistant asphalt pavement structure and construction method thereof
  • Reflection crack resistant asphalt pavement structure and construction method thereof
  • Reflection crack resistant asphalt pavement structure and construction method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] An anti-reflective cracked asphalt pavement structure, which includes a high-performance graded crushed stone base, a modified emulsified asphalt bonding layer and a rock asphalt layer from bottom to top; the high-performance graded crushed stone base is 96.4% by weight aggregate and 3.6% water, the thickness of the high-performance graded crushed stone base is 40cm; the thickness of the modified emulsified asphalt bonding layer is 0.3cm; the rock asphalt layer consists of the following weight The percentages of materials are mixed: 92.2% of aggregate, 3.5% of ball-milled limestone powder, 4.3% of rock asphalt modified asphalt, and the thickness of the rock asphalt layer is 10cm.

[0032] The construction method of the above-mentioned anti-reflection crack asphalt pavement structure comprises the following steps:

[0033] (1) The cleaning preparation of the lower bearing layer, cleaning the loose particles on the lower bearing layer surface;

[0034] (2) Using a stabil...

Embodiment 2

[0056] An anti-reflective cracked asphalt pavement structure, which includes a high-performance graded crushed stone base, a modified emulsified asphalt bonding layer and a rock asphalt layer from bottom to top; the high-performance graded crushed stone base consists of the following materials in weight percentage Mixed, aggregate 95.8%, water 4.2%, the thickness of the high-performance graded crushed stone base is 10cm, and the thickness of the modified emulsified asphalt bonding layer is 0.2cm.

[0057] The rock asphalt layer is formed by mixing the following materials by weight percentage, aggregate 90.0%, ball milled limestone powder 5.0%, rock asphalt modified asphalt 5.0%, and the thickness of the rock asphalt layer is 12cm.

[0058] The construction method of the anti-reflection crack asphalt pavement structure comprises the following steps:

[0059] (1) The cleaning preparation of the lower bearing layer, cleaning the loose particles on the lower bearing layer surface;...

Embodiment 3

[0080] An anti-reflective cracked asphalt pavement structure, which includes a high-performance graded crushed stone base, a modified emulsified asphalt bonding layer and a rock asphalt layer from bottom to top; the high-performance graded crushed stone base consists of the following materials in weight percentage Mixed, aggregate 95.0%, water 5.0%, the thickness of the high-performance graded crushed stone base is 18cm, and the thickness of the modified emulsified asphalt bonding layer is 0.25cm.

[0081] The rock asphalt layer is mixed with the following materials in weight percentage, aggregate 93.0%, ball milled limestone powder 4.0%, rock asphalt modified asphalt 3.0%, and the thickness of the rock asphalt layer is 8cm.

[0082] The construction method of the anti-reflection crack asphalt pavement structure includes the following construction techniques:

[0083] (1) Preparation for cleaning the lower bearing layer, cleaning loose particles on the lower bearing layer surf...

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Abstract

The invention belongs to the technical field of road design and construction and discloses a reflection crack resistant asphalt pavement structure and a construction method thereof. The pavement structure sequentially comprises a high-performance graded broken stone base layer, a modified emulsified asphalt adhesive layer and a rock asphalt layer from bottom to top. The construction method comprises the following steps: clearing the surface of a lower supporting layer; mixing, spreading and rolling the raw material of high-performance graded broken stone; spraying the modified emulsified asphalt adhesive layer onto the surface of the high-performance graded broken stone base layer; spreading a rock asphalt modified asphalt mixture on the surface of the modified emulsified asphalt adhesive layer by using an asphalt mixture spreading machine; and then rolling by using a double-drum vibratory roller and a tyre roller. The reflection crack resistant asphalt pavement structure has the advantages that the performance advantages of all structural layers are fully exerted, the generation and development of reflective cracks of pavements are reduced and delayed, the blocking property and waterproof property between the asphalt surface layer and the base layer are increased, the asphalt pavement structure strength is increased, and the asphalt pavement performance is improved.

Description

technical field [0001] The invention belongs to the technical field of road design and construction, and relates to a pavement structure for high-grade highways or municipal roads, in particular to an anti-reflection crack asphalt pavement structure and a construction method thereof. Background technique [0002] Semi-rigid base asphalt pavement is the main type of pavement structure of high-grade highways and municipal roads in my country. It was found in use that the main defect of the semi-rigid base layer is the problem of reflective cracks. The semi-rigid base has technical problems such as easy cracking to form reflection cracks, easy erosion between layers, and high load sensitivity. After cracks appear in the base of the semi-rigid base asphalt pavement, the cracks become the stress concentration area of ​​the load. Under the repeated action of traffic load and environmental factors, the cracks expand and extend upwards, and finally form reflective cracks that run ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32
Inventor 黄文通王端宜徐国元
Owner SOUTH CHINA UNIV OF TECH
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