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Flexible roadbed asphalt concrete structure and construction method thereof

A technology of asphalt concrete and construction method, which is applied in the direction of roads, roads, on-site cohesive pavements, etc., which can solve the problems of long maintenance period, difficult road surface structure maintenance, service life and service status, which are difficult to accurately predict and judge To achieve the effect of stabilizing the subbase structure, avoiding repeated construction, and reducing the construction period and construction cost

Inactive Publication Date: 2020-07-28
ZHENJIANG PORT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the perspective of mechanical properties, the mechanical properties of semi-rigid bases are easily affected by factors such as environment, construction, and heavy loads. The constant changes in its own strength and the complexity of internal damage development make it difficult to accurately predict its service life and service state. This is also the core reason for the lack of precision in the design of semi-rigid base asphalt pavement and the difficulty in decision-making in later maintenance
From the perspective of operation and maintenance, the semi-rigid base is the main bearing layer of the asphalt pavement. The occurrence of its disease will have a fatal impact on the service life of the entire pavement structure. Due to the concealment of the semi-rigid base, there is currently no effective evaluation method for its performance status. , there is also a lack of effective treatment methods for its structural diseases, which makes it difficult to effectively maintain the pavement structure. Once the damage occurs, it will be difficult to maintain later, the maintenance period is long, and the maintenance cost is high

Method used

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  • Flexible roadbed asphalt concrete structure and construction method thereof
  • Flexible roadbed asphalt concrete structure and construction method thereof
  • Flexible roadbed asphalt concrete structure and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] It can be seen from the accompanying drawings that a flexible roadbed asphalt concrete structure, in which:

[0063] The subbase is broken and compacted by crushing the original cement concrete pavement, and the thickness of the subbase after crushing is 25cm;

[0064] Sprinkle 50% slow-cracking emulsified asphalt on the top surface of the subbase, the dosage is 3kg / square meter;

[0065] Lay graded gravel on the subbase to form the base, the base is paved with graded gravel, and the laying thickness is 15cm;

[0066] Sprinkle 50% slow-cracking emulsified asphalt on the top surface of the base, the dosage is 2.5kg / square meter;

[0067] Lay the anti-fatigue asphalt layer on the base layer. The anti-fatigue asphalt layer is laid with AC-13 asphalt concrete. The AC-13 asphalt concrete is divided into two layings. The laying thickness is 2 layers*4cm, and the total thickness of the fatigue-resistant asphalt layer is 8cm. ;

[0068] Sprinkle modified emulsified asphalt o...

Embodiment 2

[0075] It can be seen from the accompanying drawings that a flexible roadbed asphalt concrete structure, in which:

[0076] The subbase is broken and compacted by crushing the original cement concrete pavement, and the thickness of the subbase after crushing is 25cm;

[0077] Sprinkle 50% slow-cracking emulsified asphalt on the top surface of the subbase, the dosage is 3kg / square meter;

[0078] Lay graded gravel on the subbase to form the base, the base is paved with graded gravel, and the laying thickness is 15cm;

[0079] Sprinkle 50% slow-cracking emulsified asphalt on the top surface of the base, the dosage is 2.5kg / square meter;

[0080] Lay the anti-fatigue asphalt layer on the base layer. The anti-fatigue asphalt layer is laid with AC-13 asphalt concrete. The AC-13 asphalt concrete is divided into two layings. The laying thickness is 2 layers*4cm, and the total thickness of the fatigue-resistant asphalt layer is 8cm. ;

[0081] Sprinkle modified emulsified asphalt o...

Embodiment 3

[0087] It can be seen from the accompanying drawings that a flexible roadbed asphalt concrete structure, in which:

[0088] The subbase is broken and compacted by crushing the original cement concrete pavement, and the thickness of the subbase after crushing is 25cm;

[0089] Sprinkle 50% slow-cracking emulsified asphalt on the top surface of the subbase, the dosage is 3kg / square meter;

[0090] Lay graded gravel on the subbase to form the base, the base is paved with graded gravel, and the laying thickness is 16cm;

[0091] Sprinkle 50% slow-cracking emulsified asphalt on the top surface of the base, the dosage is 2.5kg / square meter;

[0092] Lay the anti-fatigue asphalt layer on the base layer. The anti-fatigue asphalt layer is laid with AC-13 asphalt concrete. The AC-13 asphalt concrete is divided into two layings. The laying thickness is 2 layers*4cm, and the total thickness of the fatigue-resistant asphalt layer is 8cm. ;

[0093] Sprinkle modified emulsified asphalt o...

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Abstract

The invention discloses a flexible roadbed asphalt concrete structure which comprises a sub-base layer, a base layer, an anti-fatigue asphalt layer, a tension-compression transition layer, an asphaltmiddle-lower surface layer and an asphalt upper surface layer, the sub-base layer is arranged at the bottommost layer of the roadbed asphalt concrete structure; the base layer is arranged on the upperlayer of the sub-base layer; the anti-fatigue asphalt layer is arranged on the upper layer of the base layer; the tension-compression transition layer is arranged on the upper layer of the anti-fatigue asphalt layer; the asphalt middle-lower surface layer is arranged on the upper layer of the tension-compression transition layer; the asphalt upper surface layer is arranged on the upper layer of the asphalt middle-lower surface layer. According to the invention, a structural scheme of the waterproof anti-rut asphalt upper surface layer, the asphalt middle-lower surface layer, the tension-compression transition layer and the anti-fatigue asphalt layer is determined, three structural form parameters of the structural scheme are designed and demonstrated, and the flexible base asphalt pavement with excellent performance is provided.

Description

technical field [0001] The invention relates to the field of road surface construction, in particular to a flexible roadbed asphalt concrete structure and a construction method thereof. Background technique [0002] The roads in the port area mostly use cement pavement to meet the heavy load requirements. The large number of joints in the cement pavement provide a sufficient way for water to enter the pavement structure, which leads to the weakness and hollowing out of the structural foundation. However, once the cement pavement becomes weak and empty, its service life will drop sharply, and the maintenance of the cement pavement after damage is very difficult, which is manifested in a large amount of work, a long construction period and high costs. [0003] Compared with cement concrete pavement, asphalt pavement has a series of advantages such as continuous, seamless, high flatness, low noise and low dust. It has become an inevitable development trend to transform cement p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32E01C7/18E01C7/24
CPCE01C7/185E01C7/24E01C7/325
Inventor 白建军李学洪侯进王建许志远
Owner ZHENJIANG PORT GRP CO LTD
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