Preparation method of modified rubber powder, rubber powder modified asphalt and mixture and preparation method thereof

A technology of modified rubber powder and modified asphalt, used in building thermal insulation materials, building components, buildings, etc., can solve the problem that the performance of asphalt mixture cannot be fundamentally improved, and the swelling and Rapid dispersion, insufficient swelling time of rubber powder, etc., to achieve the effect of shortening wet processing time, high cost performance and performance improvement

Active Publication Date: 2012-04-11
CHINA RUBBER RESOURCE REGENERATION QINGDAO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current wet waste rubber powder modified asphalt technology is mostly a high-temperature wet process, that is, it is made by long-term high-speed stirring at a relatively high temperature (200°C); there are also methods of mixing asphalt with waste rubber powder, SBS, PE, etc. Polymer materials are produced at temperatures above 180°C by colloid mills and other high-shear blending and dispersing equipment, such as CN 100445333C, CN 1170733A, and CN101275027A, but the above-mentioned methods have high modification temperatures and serious secondary pollution And the shortcomings of high energy consumption, poor performance, and large amount of processed asphalt have caused certain restrictions on the development of wet methods.
Since the segregation problem of rubber modified asphalt has not been well solved, the rubber modified asphalt under the wet process must be processed and used on site and cannot be transported

Method used

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  • Preparation method of modified rubber powder, rubber powder modified asphalt and mixture and preparation method thereof
  • Preparation method of modified rubber powder, rubber powder modified asphalt and mixture and preparation method thereof
  • Preparation method of modified rubber powder, rubber powder modified asphalt and mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] In parts by mass, 3 parts of PE-G-MAH were added to 100 parts of base asphalt, and modified by a high-shear emulsifier at 170°C to obtain modified asphalt. Spray 30 parts of modified asphalt into 100 parts of 40-mesh waste rubber powder, stir at a high speed of 2500r / min for 5 minutes at a temperature of 100°C, and cool with air for 3 minutes. When the temperature drops to 45°C, continue stirring for 5 minutes , to obtain high-performance and high-dispersion modified rubber powder; then 20 parts of modified rubber powder and 100 parts of base asphalt were mixed at 150 ° C, and stirred at a high speed of 600 r / min for 20 minutes to obtain waste rubber powder modified asphalt binder.

Embodiment 2

[0036]In parts by mass, 3 parts of PE-G-MAH were added to 100 parts of base asphalt, and modified by a high-shear emulsifier at 170°C to obtain modified asphalt. Spray 30 parts of modified asphalt into 100 parts of 40-mesh waste rubber powder, stir at a high speed of 2500r / min for 5 minutes at a temperature of 100°C, and cool with air for 7 minutes. When the temperature drops to 45°C, add 2 parts of glass Microbeads, continue to stir for 5 minutes to obtain high-performance and high-dispersion modified rubber powder; then mix 20 parts of modified rubber powder with 100 parts of base asphalt at 150 ° C, and stir at 600 r / min for 20 minutes to obtain waste rubber powder modified asphalt binder.

Embodiment 3

[0038] In parts by mass, 5 parts of EVA was added to 100 parts of base asphalt, and modified by a high-shear emulsifier at 150° C. to obtain modified asphalt. Spray 10 parts of modified asphalt into 100 parts of 80-mesh waste rubber powder, stir at a high speed of 1500r / min for 15 minutes at a temperature of 120°C, and cool with air for 10 minutes. When the temperature drops to 40°C, add 3 parts of silicon Alginate, continue to stir for 10 minutes to obtain high-performance and high-dispersion modified rubber powder; then mix 20 parts of modified rubber powder with 100 parts of base asphalt at 170 ° C, and stir at 1000 r / min for 20 minutes to obtain waste rubber powder modified asphalt binder.

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Abstract

The invention relates to a preparation method of modified rubber powder, which comprises the following steps: blending polymer and asphalt to prepare modified asphalt having uniform and stable performance, uniformly coating the modified asphalt on the surface of rubber powder, enabling the rubber powder to be thoroughly pre-swollen, and separating rubber powder particles with separant to keep therubber powder in a powder form and consequently achieve the purpose of enhancing dispersion, thus obtaining the novel modified rubber powder, wherein the separant can lower the processing difficulty during the mixture of the rubber powder and the asphalt while enhancing dispersion and keeping the rubber powder in the powder form. The invention also includes rubber powder modified asphalt using the modified rubber powder and a preparation method thereof, and a modified asphalt mixture and a preparation method thereof. When being used in the field of modified asphalt, the modified rubber powdercan be simultaneously used for improving the processing technique based on the wet method and the product performance based on the dry method.

Description

technical field [0001] The invention relates to the preparation of a high-performance high-dispersion modified rubber powder, which is used to improve the performance of road asphalt. Background technique [0002] With the rapid development of the transportation industry, a large number of waste tires are produced, and the recycling of waste tires has become a worldwide problem. In the rubber materials used in tires, the polymer chains have been chemically cross-linked, and there are high proportions of fillers (mainly carbon black), softening oil and other substances, which have many restrictions on recycling, and waste tires are used to produce Rubber powder is one of the most reasonable and effective ways recognized by people. Asphalt is a road paving material widely used in the world. With the rapid development of road construction, people have higher and higher requirements for asphalt concrete. The technology of waste rubber powder modified asphalt came into being un...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L53/02C08L9/06C08L7/00C08L23/06C08L23/12C08L23/08C08L51/06C08L25/06C08K9/00C08K7/20C08K3/34C08K3/26C04B26/26
Inventor 董大伟郑广宇张立群李晓林
Owner CHINA RUBBER RESOURCE REGENERATION QINGDAO
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