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Asphalt pavement stress reflect crack repairing material and repairing method

A technology for reflecting cracks and asphalt pavement, applied in the direction of roads, roads, pavement details, etc., can solve the problems of poor flow permeability, secondary damage, high viscosity of modified asphalt, etc., to achieve improved stability, excellent high temperature stability performance, Enhance the effect of penetration

Active Publication Date: 2016-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Modified asphalt is used as the repair material. If the joint filling process without slotting is used for repairing, due to the high viscosity of the modified asphalt and poor flow and permeability, the asphalt poured into the cracks in the road surface is very little. Therefore, the slotting process is generally used, but It is only the modified asphalt that fills the gaps in the asphalt pavement surface layer, and the cracks in the base layer still exist, which is a temporary solution, not a permanent cure
In addition, during the process of slotting with a slotting machine, secondary damage will be caused to the small cracks at the edge of the crack. Even if the cracks are filled and sealed, rainwater will still enter from the small cracks at the edge of the crack, causing the potting glue to fail.

Method used

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  • Asphalt pavement stress reflect crack repairing material and repairing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Mix No. 93 gasoline, aviation kerosene and No. 0 diesel oil according to the mass ratio of 2:1:0.4 to prepare diluent for use.

[0055] (2) Zhenhai SBS modified asphalt (60%) with a penetration degree (25°C, 0.1mm) of 61, stop heating after heating to 140°C, and add alkyl polyoxyethylene ether (4%) under stirring 5 minutes. Finally, add the configured diluent (36%) and stir for 15 minutes to obtain the high-permeability liquid asphalt of the present invention.

Embodiment 2

[0057] (1) Mix No. 93 gasoline, aviation kerosene and No. 0 diesel oil according to the mass ratio of 1.5:1:0.4 and prepare it as a diluent for use.

[0058] (2) Heat the Zhenhai Grade A bitumen (70%) with a penetration (25°C, 0.1mm) of 61 to 120°C, stop heating, add the prepared diluent (28%) while stirring, and stir for 5 minutes. Finally, add fatty alcohol polyoxyethylene ether (2%) and continue stirring for 20 minutes to obtain the high-permeability liquid pitch of the present invention.

[0059] Filling glue:

Embodiment 3

[0061] (1) Heat Zhenhai base asphalt (83%) with a penetration degree (25°C) of 110 to 180°C-190°C, add 60 mesh waste tire rubber powder (16%), and perform high-shear grinding for 2-3 times Stir in the development tank for 1 h,

[0062] (2) Add 1% slow-release chemical modifier (benzoyl peroxide), stir evenly, and then inject compressed air from the bottom of the tank. Air volume is 0.2m 3 × kg -1 × h -1 . Stirring was continued for 1 hour, after which the blowing of compressed air was stopped.

[0063] (3) Add an equal amount of SBS modified asphalt (SBS content: 6%, penetration (25°C): 701 / 10mm) and continue stirring for 1 hour. Promptly obtain the caulking glue of the present invention.

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Abstract

The invention discloses an asphalt pavement stress reflect crack repairing material and a crack repairing method therewith. The repairing material includes high-permeability liquid asphalt and high-performance crack sealant, wherein the crack sealant is a composite modified material including rubber asphalt and polymer-modified asphalt. During the preparation process of the rubber asphalt, a slow-release chemical modifier is added and oxygen is blown in to improve stability of rubber powder in hot asphalt, and then SBS or SBR modified asphalt, which is high in content of polymers, is added to the rubber asphalt at certain ratio, so that the crack sealant not only has the advantages of SBS modified asphalt, but also has the characters of rubber powder asphalt. The crack repairing material is excellent in high-temperature stability, anti-aging performance, anti-low-temperature-cracking performance, anti-fatigue performance and interface adhesive performance.

Description

technical field [0001] The invention relates to a pavement repair material and a repair method, belonging to the technical field of road maintenance. In particular, it relates to a material and a repairing method which are convenient and fast in construction and fundamentally and effectively repair the stress reflection cracks of the asphalt pavement. Background technique [0002] With the development of the national economy, the mileage of high-grade highways continues to increase. In order to meet the requirements of heavy traffic and heavy load on high-grade highways, the semi-rigid pavement with inorganic binder stabilized soil as the base layer and asphalt concrete as the surface layer is widely used in high-grade pavements. However, it has been found to have serious problems after long-term use. crack problem. For the semi-rigid base asphalt pavement, the semi-rigid base will shrink and crack under the temperature gradient and humidity changes, and then reflect upwar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/18E01C11/00
Inventor 张建峰郭皎河刘树华傅丽姚汉荣
Owner CHINA PETROLEUM & CHEM CORP
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