A kind of rubber modified asphalt mixture and its preparation method and pavement structure

A technology for modification of asphalt mixture and rubber, which is applied in the field of pavement construction, can solve the problems of threshing and falling, and achieve the effects of improving the bonding state, enhancing flexibility, and improving deformation ability

Active Publication Date: 2022-02-15
JINAN MUNICIPAL ENG DESIGN & RES INSITITUTE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors of the present application found that rubber-modified asphalt mixtures are prone to threshing and grain loss problems during application. There have been researches in China to add hydrated lime to the mixture to avoid the occurrence of the above phenomenon, but in the process of use Discovery still has its limitations

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  • A kind of rubber modified asphalt mixture and its preparation method and pavement structure
  • A kind of rubber modified asphalt mixture and its preparation method and pavement structure

Examples

Experimental program
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Effect test

Embodiment 1

[0051] An asphalt mixture comprises 4 parts of asphalt, 71 parts of stone material, 5 parts of rubber particles, 9 parts of silane coupling agent and 11 parts of polymerized monomer, and the stone material is silicate stone material.

[0052] The polymerized monomer is 1-bromostyrene propylene, the silane coupling agent is vinyltrimethoxysilane, the asphalt is SBR modified asphalt, and the particle size of the rubber particles is 20 mesh.

[0053] The preparation method is as follows:

[0054] 1) Mix SBR modified asphalt with stone;

[0055] 2) Add a silane coupling agent to the above stirring mixture, and react at 100°C for 1.5h to obtain the first reaction mixture;

[0056] 3) adding the rubber particles into the first reaction mixture, stirring and mixing to obtain a second mixture;

[0057] 4) Add the mixed liquid of the polymerized monomer and the initiator to the second mixture, and carry out a polymerization reaction for 1.5 h under the condition of stirring at 110° C...

Embodiment 2

[0059] An asphalt mixture comprises 3 parts of asphalt, 82 parts of stone material, 2 parts of rubber particles, 5 parts of silane coupling agent and 8 parts of polymerized monomer, and the stone material is silicate stone material.

[0060] The polymerized monomer is 2-pentene, the silane coupling agent is γ-aminopropyltriethoxysilane, the asphalt is SBR modified asphalt, and the particle size of the rubber particles is 20 mesh.

[0061] The preparation method is as follows:

[0062] 1) Mix SBR modified asphalt with stone;

[0063] 2) adding a silane coupling agent to the above stirring mixture, and reacting at 80° C. for 1 hour to obtain the first reaction mixture;

[0064] 3) adding the rubber particles into the first reaction mixture, stirring and mixing to obtain a second mixture;

[0065] 4) Add the mixed liquid of the polymerization monomer and the initiator to the second mixture, and carry out the polymerization reaction for 15 minutes under the condition of stirring...

Embodiment 3

[0067] An asphalt mixture comprises 5 parts of asphalt, 68 parts of stone material, 7 parts of rubber particles, 7 parts of silane coupling agent and 13 parts of polymerized monomer, and the stone material is silicate stone material.

[0068] The polymerized monomer is ethyl styrene, the silane coupling agent is vinyltriacetoxysilane, the asphalt is SBR modified asphalt, and the particle size of the rubber particles is 20 mesh.

[0069] The preparation method is as follows:

[0070] 1) Mix SBR modified asphalt with stone;

[0071] 2) adding a silane coupling agent to the above stirring mixture, and reacting at 120° C. for 2 hours to obtain the first reaction mixture;

[0072] 3) adding the rubber particles into the first reaction mixture, stirring and mixing to obtain a second mixture;

[0073] 4) Adding the mixed solution of polymerized monomers and initiators to the second mixture, and polymerizing for 3 hours under the condition of stirring at 150° C. to obtain the rubber...

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Abstract

The application relates to a rubber-modified asphalt mixture and its preparation method and pavement structure. The rubber-modified asphalt mixture includes 65-85 parts of stone materials, 1-6 parts of rubber particles, 3-9 parts of silane coupling agent, polymerized unit 5 to 13 parts of asphalt and asphalt; the asphalt mixture has a ratio of asphalt to 4 to 6%, and the stone includes at least silicate stone. By adding silane coupling agent and polymerized monomer to asphalt mixture, the bonding force between rubber and stone can be improved.

Description

technical field [0001] The application belongs to the technical field of pavement construction, and in particular relates to a rubber-modified asphalt mixture, a preparation method thereof, and a pavement structure. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the application, and is not necessarily regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] In northern my country, due to the cold winter climate, the problem of snow and ice accumulation on roads is very serious, which not only affects traffic safety, but also restricts road transportation efficiency and economic development. Therefore, seeking scientific and effective road surface deicing and snow technology has become an important research direction. [0004] The study found that the use of rubber-modi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26C04B111/20C04B111/27C04B111/34C04B111/50
CPCC04B26/26C04B2111/0075C04B2111/27C04B2111/20C04B2111/2038C04B2111/503C04B2111/343C04B2201/50C04B14/04C04B18/22C04B24/42C04B24/005C04B24/00
Inventor 张庆印王平戴欣王澍高超邢邦宁王仁晓崔云志董事韩琦炜
Owner JINAN MUNICIPAL ENG DESIGN & RES INSITITUTE GRP
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