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Cement-stabilized anti-crack base newly-built pavement structure and construction method and application thereof

A technology for cement stabilization and pavement structure

Active Publication Date: 2020-04-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: Aiming at the problems existing in the prior art, the present invention provides a newly-built pavement structure of a cement-stabilized anti-crack base, which reduces the reflective cracks of the asphalt pavement structure of the semi-rigid base, so as to solve the problem of reflection cracks in the traditional semi-rigid base pavement structure. Expansion and penetration bring about various diseases, and reduce various diseases caused by the expansion and penetration of reflective cracks in the pavement structure, so as to achieve the purpose of prolonging the service life of the pavement structure

Method used

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  • Cement-stabilized anti-crack base newly-built pavement structure and construction method and application thereof

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Embodiment 1

[0033] A cement-stabilized anti-crack base new pavement structure, which is applied to arterial highways with heavy traffic. The project is a new project, such as figure 1 Shown is the cross-sectional design drawing of the pavement structure of the newly-built scheme.

[0034] The pavement structure includes asphalt concrete upper layer, asphalt concrete lower layer, cement stabilized anti-crack base and cement stabilized subbase laid on the roadbed from top to bottom;

[0035]The cement-stabilized anti-cracking base is set above the cement-stabilized sub-base. The material of the cement-stabilized large-grained crushed stone base is crack-resistant cement-stabilized crushed stone mixture. In order to meet the needs of traffic volume, the thickness of this layer is set to 20cm. The main components of the anti-cracking cement-stabilized gravel mixture are cement, large-grained gravel and small-sized gravel, which play the roles of plate blocking, deformation absorption and stre...

Embodiment 2

[0046] Embodiment 2 has the same structure and construction method as Embodiment 1, except that:

[0047] The cement-stabilized anti-crack base material is set above the cement-stabilized sub-base as a crack-resistant cement-stabilized crushed stone mixture with a thickness of 15cm; the cement used in the cement-stabilized anti-crack base material is PC 32.5, and the dosage is 6.0%; the upper layer of asphalt concrete The designed gradation is AC-13, with a thickness of 6cm; the designed gradation of the lower layer of asphalt concrete is AC-25, with a thickness of 8cm; the cement-stabilized subbase is an ordinary water-stabilized subbase, with a thickness of 15cm.

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Abstract

The invention discloses a cement-stabilized anti-crack base layer newly-built pavement structure and a construction method and application thereof. The pavement structure sequentially comprises an asphalt concrete upper surface layer, an asphalt concrete lower surface layer, a cement-stabilized anti-crack base layer and a cement-stabilized subbase layer from top to bottom, wherein the cement-stabilized anti-crack base layer is made of an anti-crack cement-stabilized macadam mixture and mainly comprises cement, large-particle macadam and small-size aggregate, the cement-stabilized anti-crack base layer adopts a road mixing construction mode after on-site layer paving, it is guaranteed that the large-particle macadam makes full contact to form main frameworks, and the small-size aggregate evenly fills gaps between the frameworks. According to the cement-stabilized anti-crack base layer newly-built pavement structure, reflection cracks of a semi-rigid base asphalt pavement structure are reduced, so that various disease problems caused by expansion and penetration of the reflection cracks of a traditional semi-rigid base asphalt pavement structure are solved, various diseases caused byexpansion and penetration of the reflection cracks of the pavement structure are reduced, and the purpose of prolonging the service life of the pavement structure is achieved.

Description

technical field [0001] The invention belongs to the field of transportation engineering, and in particular relates to a cement-stabilized anti-crack base-level newly-built pavement structure for national and provincial arterial roads, municipal roads and expressways. Background technique [0002] Semi-rigid base asphalt pavement is the main pavement structure form of national and provincial trunk roads in China. Semi-rigid base asphalt pavement has been widely used in China due to its technical advantages such as high comprehensive strength and low cost, and has made an indelible contribution to the development of China's highway industry. [0003] However, the semi-rigid base course represented by water-stabilized gravel and lime-fly ash gravel has inherent characteristics of materials such as high modulus, compressive capacity much greater than tensile capacity, etc. It is difficult to effectively control the problems of drying shrinkage and temperature shrinkage cracking....

Claims

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Application Information

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IPC IPC(8): E01C7/32
CPCE01C7/32
Inventor 李昶郭雨鑫
Owner SOUTHEAST UNIV
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