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Preparation method of road rubber powder asphalt with excellent anti-rut property

A technology of anti-rutting and modified asphalt, which is applied in the field of asphalt pavement material preparation, can solve the problems affecting the performance of modified asphalt, poor compatibility of matrix asphalt, easy precipitation, segregation, etc., to avoid softening point reduction and interface bonding High performance, improved cohesion and flexibility

Pending Publication Date: 2017-09-15
安徽中宏橡塑有限公司
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AI Technical Summary

Problems solved by technology

[0004] The rubber molecular chains in the vulcanized rubber powder have been cross-linked into a network structure, which has poor fluidity, low surface activity, poor processability, and poor compatibility with the base asphalt, which makes the rubber powder easy to precipitate and segregate in the asphalt, directly affecting its improvement. Performance of permanent asphalt and its application in road construction

Method used

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Embodiment Construction

[0022] A preparation method of road rubber powder asphalt with excellent anti-rutting performance. After the desulfurized waste tire rubber powder is subjected to surface oxidation, low-temperature plasma activation treatment, and then gasoline activation treatment, the waste tire rubber powder modified asphalt is improved. High temperature performance and elastic recovery performance.

[0023] Specific steps are as follows:

[0024] (1) Oxidation modification:

[0025] Put 90 parts by weight of desulfurized waste tire rubber powder in a reaction bottle, add 300 parts of distilled water, stir well to make it evenly mixed, add 35 parts of oxidant, and stir in a water bath at a constant temperature of 75°C for 3 hours. Suction filtration and washing are carried out after the reaction, and the obtained rubber powder is dried until the quality does not change, and the oxidation-modified rubber powder is obtained;

[0026] (2) Low temperature plasma activation:

[0027] Spread t...

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Abstract

The invention discloses a preparation method of road rubber powder asphalt with excellent anti-rut property. After desulfurized scrap tire rubber powder is subjected to surface oxidation and low-temperature plasma activating treatment, gasoline activating treatment is performed to enhance the high-temperature property and elastic recovery property of scrap tire rubber powder modified asphalt. The active group content on the surface of the rubber powder subjected to oxidation and primary activation is enhanced; under the double actions of physical blending and chemical reaction, the interface bonding property with asphalt is higher, and the cohesive force and flexibility of the asphalt are enhanced, thereby avoiding the problem of the reduction of the softening point caused by secondary activation of gasoline; and besides, after the rubber powder is subjected to the secondary activation of gasoline, the elastic recovery property is enhanced, the pavement performance is greatly improved, and the anti-rut capacity is higher.

Description

technical field [0001] The invention relates to a preparation method of an asphalt pavement material, in particular to a preparation method of road rubber powder asphalt with excellent anti-rutting performance. Background technique [0002] Asphalt pavement is the main pavement structure form of highways and urban roads in our country. With the rapid development of the national economy, the traffic density and heavy vehicles are increasing day by day, so that the asphalt pavement is severely tested. From the perspective of economy and environmental protection, research work on the use of waste tire rubber powder to modify asphalt for road construction has been carried out at home and abroad. , has the advantages of stronger anti-aging, anti-fatigue, reduced noise, increased friction, etc., and also has the characteristics of low-temperature crack resistance, high-temperature stability, and durability. [0003] There are currently three theories about the mechanism of rubber...

Claims

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Application Information

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IPC IPC(8): C08C19/04C08L95/00C08L19/00C08L91/00C08J11/10
CPCC08C19/04C08J11/10C08J2319/00C08L19/003C08L91/00C08L95/00C08L2205/03Y02W30/62
Inventor 李国友
Owner 安徽中宏橡塑有限公司
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