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A kind of modified rubber asphalt and preparation method thereof

A technology for modifying rubber and asphalt, used in building components, building insulation materials, buildings, etc., can solve the problems of high viscosity of rubber asphalt, poor high temperature performance, reduced high temperature performance, etc., to achieve good adhesion and enhanced compatibility. Effect

Active Publication Date: 2021-05-14
NANJING TONGAN ROAD ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of material selection and other factors, the prepared rubber asphalt mixture is still unsatisfactory in terms of adhesion and anti-rutting performance.
The main reason for the lack of adhesion performance is that rubber asphalt has added more than 15% of rubber powder, which makes the asphalt too viscous, so it is difficult to coat the stone surface; the main reason for the poor anti-rutting performance is the adhesion of rubber asphalt and stone After the performance is reduced, the high temperature performance will be reduced. In addition, the asphalt content added to the rubber asphalt mixture is relatively high, which is about 50% higher than that of ordinary asphalt mixture. The mixture corresponding to the higher asphalt content has poor high temperature performance.
If general modifiers are added to rubber asphalt, it will lead to higher viscosity of rubber asphalt. Although there is a patent to add it by dry method, it will still increase the construction difficulty of rubber asphalt mixture.

Method used

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  • A kind of modified rubber asphalt and preparation method thereof

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preparation example Construction

[0027] In the preparation process of the modified graphene oxide in the embodiment of the present invention, the reaction raw material uses expanded graphite oxide as a precursor instead of directly using graphite oxide as a precursor. There are two main advantages: one is that the expanded graphite oxide is relatively fluffy and has a large specific surface area. After expansion, there are still oxygen-containing functional groups on it, providing binding sites for adsorption, and a reduction reaction occurs at room temperature. Due to its large surface area, the content of modifiers on the support is increased. The second is that instead of adding auxiliary dispersants such as isopropanol and polyvinylpyrrolidone during the preparation process as in the traditional preparation method, the reducing agent is directly used, so that the prepared material has no other impurities, which is relatively "clean" and the reaction time The addition of expanded graphite oxide is mixed w...

Embodiment 1

[0031] A modified rubber asphalt, comprising the following raw materials in parts by weight: 100 parts of asphalt matrix, 20-40 parts of rubber powder, 10-25 parts of modified graphene oxide, 5-15 parts of resin, 5-15 parts of fiber and stable 5-15 doses.

[0032] The preparation method of above-mentioned modified rubber asphalt:

[0033] Grind graphite oxide into powder and calcinate it in a muffle furnace at 800°C to obtain expanded graphite oxide. Add expanded graphene oxide to ethanol under the condition of a water bath at 50°C, and ultrasonically disperse it; then add and expand graphene oxide The mass ratio of oleic acid is 1:1. After reacting for 1.5 minutes, cool to room temperature, wash with absolute ethanol to remove unreacted oleic acid, and then vacuum freeze-dry to obtain oleic acid-modified graphene oxide.

[0034] Add rubber powder, oleic acid-modified graphene oxide, resin and fiber to the asphalt matrix, heat and stir at 200°C for 20 minutes; then add 5-15 p...

Embodiment 2

[0036] A modified rubber asphalt, comprising the following raw materials in parts by weight: 100 parts of asphalt matrix, 25-35 parts of rubber powder, 10-20 parts of modified graphene oxide, 5-12 parts of resin, 5-12 parts of fiber and stable 5-12 doses.

[0037] The preparation method of above-mentioned modified rubber asphalt:

[0038]Grind graphite oxide into powder and calcinate it in a muffle furnace at 1000°C to obtain expanded graphite oxide. Add expanded graphene oxide to ethanol in a water bath at 70°C and ultrasonically disperse it; then add expanded graphene oxide The mass ratio of maleic anhydride is 1:100. After reacting for 1.5, cool to room temperature and wash with absolute ethanol to remove unreacted maleic anhydride, and then vacuum freeze-dry to obtain maleic anhydride-modified graphene oxide .

[0039] Add rubber powder, maleic anhydride-modified graphene oxide, resin and fiber into the asphalt matrix, heat and stir at 200°C for 20 minutes; then add 5-15...

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Abstract

The invention discloses a modified rubber asphalt and a preparation method thereof. The modified rubber asphalt comprises the following raw materials in parts by weight: 100 parts of asphalt matrix, 20-40 parts of rubber powder, 10-25 parts of modified graphene oxide, 5-15 parts of resin, 5-15 parts of fiber and 5-15 parts of stabilizer. By adding modified graphene oxide, resin, fiber and stabilizer, the compatibility of rubber powder and asphalt matrix is ​​enhanced, so that the modified rubber asphalt has good adhesion, stability, high temperature rutting resistance and construction stability characteristics such as sex.

Description

technical field [0001] The invention relates to the technical field of road engineering, and in particular to a modified rubber asphalt and a preparation method thereof. Background technique [0002] The application of rubber asphalt in the modern sense began in the United States in the 1940s. After the 1960s, countries such as the United States, Sweden, and the United Kingdom successively carried out research on the application of rubber asphalt and rubber asphalt concrete. Research on the application of rubber-modified asphalt to roads in my country began in the 1980s. Rubber asphalt means that waste tires are first crushed and processed into rubber powder, and then combined according to a certain gradation, and some modifiers are added at the same time. Modified asphalt cementitious material formed after the reaction. [0003] In order to improve the overall performance of rubber asphalt, other modifiers can be added to rubber asphalt for modification. Due to the limi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L21/00C08L67/00C08K9/04C08K9/06C08K3/04C08K7/14C08K7/10C08K7/06
CPCC08L95/00C08L2205/03C08L2205/035C08L2205/16C08L21/00C08L67/00C08K9/04C08K3/042C08K7/14C08K7/10C08K7/06C08K9/06C08K9/08
Inventor 胡逸查庆飞
Owner NANJING TONGAN ROAD ENG
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