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Waste rubber tyre powder modified asphalt and its prepn process

A technology of composite modified asphalt and waste tire rubber powder, which is applied to building components, building insulation materials, construction, etc., and can solve problems such as unsuitable modification, poor performance, lagging research and application, etc.

Inactive Publication Date: 2007-12-19
SHANGHAI MIRONGKE ELECTRICAL DIGITAL INTEGRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Compared with foreign countries, domestic research and application are relatively lagging behind. There are three main reasons: ①Most domestic rubber powders have high wax content, poor performance, unsuitable for modification, and lack of asphalt modifiers; ②Large-scale use of rubber powders for modification Asphalt supporting technology and market conditions are immature, and the normal temperature rubber powder production line has only been launched in recent years; ③When China’s expressways were launched in the late 1980s, the imported technology / equipment and completed examples were always based on SBS / PE and other polymer modified asphalt host

Method used

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  • Waste rubber tyre powder modified asphalt and its prepn process

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Effect test

Embodiment 1

[0087] A chemical-physical method for preparing waste rubber powder modified road asphalt comprises the following steps: selecting waste rubber powder of 20-60 mesh. Will activate modifiers, solubilizers, sulfur and compatibilizers. According to a certain ratio, the amount of waste rubber powder is 10-30 parts by weight of the amount of asphalt, and it is kept at a temperature of 100-200°C for 10-120 minutes, and then added to the hot-melt asphalt at a temperature of 160-180°C. 1500-8000 rpm, stirring for 10-40 minutes to prepare road modified asphalt.

[0088] Described activation modifying agent comprises: methacrylic acid and its salt, glycidyl ester, ethanolamine and its salt, zinc stearate, stearic acid etc., preferably methacrylic acid and glycidyl ester, and its consumption is the amount of bitumen 0.1-40 parts by weight,

[0089] The solubilizing agent includes: furfural extracted oil, deasphalted oil, aromatic fraction oil or minus four-line fraction, tall oil and t...

Embodiment 2

[0091]The preparation method of the modifier that the waste tire rubber powder meets the requirements of modified asphalt, the preparation process of the modifier is as shown in Figure 1: the activator 1, the solubilizing rubber powder 2, the rubber powder and other solubilizing agents are prepared in respective After the metering system 5 and 6 are metered, pump them into the modified liquid mixing tank. The modified reaction temperature is 140-160°C; The fully reacted mother liquor is directly pumped into the modified agent finished product tank 16 by the pump 10 after being filtered by the filter screen 8;

Embodiment 3

[0092] Embodiment 3 uses the preparation of modifying agent modified asphalt, and the preparation process is as shown in Figure 2: the base asphalt coming from the base asphalt tank 12 first passes through the filter screen 8 and the heat exchanger after exchanging heat with the heat exchanger and squeezes into the batching tank with a pump 8 ( 8); the asphalt modifier 16, stabilizer, modifier and other components 17 also enter the batching tank after passing through the metering system, the temperature of the batching tank is 160° C., and the residence time is 20 minutes. The intermediate products from the batching tank are poured into the asphalt swelling tank 19 respectively, and the asphalt swelling tank is stirred by the agitator 24, the swelling temperature is 180-200°C, and the residence time is 20-30min. The swollen intermediate product is sheared by the high-speed shearing machine 11 and then passed through the buffer tank 21 to become the finished modified asphalt pro...

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Abstract

The present invention relates to one kind of waste rubber tyre powder modified asphalt and its preparation process. The waste rubber tyre powder modified asphalt consists of asphalt matrix 100 weight portions, waste rubber tyre powder 10-30 weight portions, compatilizer 1-10 weight portions, dissolution promoter 0.5-30 weight portions, activating modifier 1-40 weight portions and emulsifier 0-5 weight portions. It is prepared through a chemical and physical process including the steps of degrading and activating the waste rubber tyre powder, vulcanizing and cross-linking, stirring and shearing. It is suitable for paving and repairing highway.

Description

technical field [0001] The invention proposes asphalt compound-modified mainly by waste tire rubber powder and a preparation method thereof, belonging to the technical field of asphalt modification. technical background; [0002] Scrap tires are called "black pollution", and its recovery and treatment technology is a worldwide problem. At present, 1.5 billion tires are scrapped every year in the world, of which about 400 million are in North America, 400 million in Western Europe, 100 million in Japan, and 120 million in China (expected to reach 200 million by 2010). Bring huge environmental pressure to the society. [0003] Rubber powder processed from waste tires, its main chemical components are natural rubber and synthetic rubber, and there are additional components such as sulfur, carbon black, silicon oxide, iron oxide, etc. However, these components are good modifiers for asphalt. It can improve asphalt's high and low temperature performance, anti-aging performance,...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K5/09C08L21/00
Inventor 吕军业韦平凌昊黄文元
Owner SHANGHAI MIRONGKE ELECTRICAL DIGITAL INTEGRATION
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