Semi-flexible functional combined structure recovery layer applied to asphalt pavement maintenance

A functional combination, asphalt pavement technology, applied in the direction of roads, roads, and on-site coagulation pavement, can solve problems such as insufficient durability and single treatment process, achieve excellent anti-skid, improve technical quality, and broad application prospects Effect

Active Publication Date: 2020-06-19
GUANGXI JINMENG ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of single treatment process for asphalt pavement functional decline and structural disease in maintenance engineering, insufficient durability after maintenance, etc., the present invention proposes a semi-flexible functional composite structure recovery layer material structure and process method for asphalt pavement maintenance

Method used

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  • Semi-flexible functional combined structure recovery layer applied to asphalt pavement maintenance
  • Semi-flexible functional combined structure recovery layer applied to asphalt pavement maintenance
  • Semi-flexible functional combined structure recovery layer applied to asphalt pavement maintenance

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Take one of the most common asphalt pavement structures as an example: the upper layer of AC-13C is 4cm, the middle layer of AC-20C is 6cm, and the lower layer of AC-25C is 8cm. Sliding performance declines and maintenance and repairs are required. The plan is to mill the upper and middle surface layer and add a semi-flexible functional composite structure recovery layer. The structure is composed of a 2cm ultra-thin wear layer and an 8cm semi-flexible middle surface layer.

[0028] Mill the original pavement surface and middle surface layer. If there are still diseases in the lower layer of the original pavement, local treatment needs to be done. If the base layer is damaged and the underlying layer is damaged, the base layer needs to be reinforced by grouting or partially replaced. After the local disease treatment of the lower layer is completed, the SBS modified hot asphalt is sprayed, and the spraying amount is 1.2Kg / ㎡.

[0029] Marshall test is used to determine...

Embodiment 2

[0035] Take one of the most common asphalt pavement structures as an example: the upper layer of AC-16C is 5cm, the middle layer of AC-20C is 6cm, and the lower layer of AC-25C is 7cm. Sliding performance declines and maintenance and repairs are required. The scheme is to mill the upper and middle surface layer and add a semi-flexible functional composite structure recovery layer. The structure consists of a 2cm ultra-thin wear layer and a 9cm semi-flexible middle surface layer.

[0036]Mill the original pavement surface and middle surface layer. If there are still diseases in the lower layer of the original pavement, local treatment needs to be done. If the base layer is damaged and the underlying layer is damaged, the base layer needs to be reinforced by grouting or partially replaced. After the local disease treatment of the lower layer is completed, the SBS modified hot asphalt is sprayed, and the spraying amount is 1.5Kg / ㎡.

[0037] Marshall test is used to determine t...

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Abstract

The invention discloses a semi-flexible functional combined structure recovery layer applied to asphalt pavement maintenance. The rear semi-flexible functional combined structure recovery layer of themilled original upper middle surface layer sequentially comprises an SBS modified asphalt bonding layer, a polymer modified cement paste poured macroporous asphalt mixture semi-flexible middle surface layer, a synchronous broken stone sealing layer and an ultrathin wearing layer from bottom to top, wherein the polymer modified cement paste poured macroporous asphalt mixture semi-flexible middle surface layer has thickness of 7-9 cm, the material is specifically polymer modified cement paste poured macroporous asphalt mixture,, the synchronous broken stone sealing layer is composed of SBS modified asphalt and limestone with the single particle size of 7.2-9.5 mm, thickness of the ultrathin wearing layer is 1.5-2.5 cm, the ultra-thin wearing layer is made of a densely-prepared SBS modifiedasphalt mixture, and total thickness of the semi-flexible function combination structure recovery layer is the same as the milling thickness. The rear semi-flexible functional combined structure recovery layer can be applied to the field of asphalt pavement maintenance such as asphalt pavement structural damage repair and heavy-load traffic pavement function improvement.

Description

technical field [0001] The invention belongs to the field of asphalt pavement maintenance materials and technical processes, in particular to a pavement structure and material process for functionally restoring damaged asphalt pavement structures. Background technique [0002] With the climax of national expressway construction receding, expressway maintenance has gradually become the focus of attention of engineers and technicians. At present, a large number of highway asphalt pavements have reached or are close to the design service life, and except for some serious damages on the pavement that need to be overhauled, most of the pavement main diseases are serious anti-skid attenuation and different degrees of rutting. This type of disease is also prone to occur. In traditional pavement maintenance methods, the only way to deal with such problems is to mill the asphalt pavement and the middle surface layer and re-pave to restore the original structure. Since the actual tra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32C04B26/26C04B28/06C04B111/72
CPCC04B26/26C04B28/06C04B2111/72C04B18/12C04B14/28C04B14/102C04B16/0641C04B24/24C04B22/0013C04B24/32C04B24/2623C04B24/36Y02W30/91
Inventor 马进刘宇杜荣耀姚新宇卢军源易强贺芳伟农彬艺黄士桐
Owner GUANGXI JINMENG ENG
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