Waste and old rubber modified asphalt

A technology for modifying asphalt and waste rubber, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of high preparation cost and improved dispersion stability of rubber powder, and achieve the effect of solving the problem of dispersion stability.

Inactive Publication Date: 2008-08-27
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, the main defects of the existing rubber-modified asphalt are: the high preparation cost and the dispersion stability of rubber powder in asphalt need to be further improved

Method used

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  • Waste and old rubber modified asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 30wt% 20-mesh microwave desulfurized waste rubber powder (hereinafter referred to as desulfurized rubber powder), 69.99wt% AH-90# Zhenhai heavy traffic road asphalt, and 0.01wt% sulfur at 250°C for 0.5 hours Modified asphalt is obtained. Its performance is shown in Table 1.

Embodiment 2

[0020] Mix 20wt% 60-mesh microwave desulfurized rubber powder, 79.6wt% AH-90# Zhenhai heavy traffic road asphalt, and 0.4wt% sulfur at 175°C for 0.5 hours to prepare waste rubber powder modified asphalt. Its performance is shown in Table 1.

Embodiment 3

[0022] 20wt% 80 mesh microwave desulfurized rubber powder, 79.2wt% AH-90# Zhenhai heavy traffic road asphalt, 0.8wt% sulfur were stirred and mixed at 200°C for 1.0 hour to prepare waste rubber powder modified asphalt. Its performance is shown in Table 1.

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Abstract

The invention relates to waste rubber modified asphalt, which is prepared by reacting rubber powder which is recycled through desulfurizing with asphalt under the condition of existing vulcanizing components under 130 DEG C-250 DEG C. The invention uses rubber powder which is recycled through desulfurizing as modifier, and prepares modified asphalt (asphalt rubber) which has low cost and excellent stable property under the condition of existing small amount of vulcanizing components, which overcomes the weaknesses existing in the prior art of higher cost and poor dispersing stability of rubber in asphalt.

Description

technical field [0001] The invention relates to a modified asphalt, in particular to a road asphalt modified by waste rubber. Background technique [0002] Asphalt modified with waste rubber is called asphalt rubber (asphalt-rubber AR). Practice has proved that asphalt rubber has the advantages of wear resistance, antifreeze, and antiskid. It has been widely used in the pavement of high-grade roads in the United States, Japan, and European countries. [0003] The main difficulty of waste rubber modified asphalt is to improve the performance and storage stability of modified asphalt. The reason: it may be that the spatial structure of the vulcanized rubber powder used or the components of recycled waste rubber powder are very complicated, which makes it difficult for the rubber powder to disperse uniformly and stably in the asphalt. Therefore, how to realize the uniform and stable dispersion of waste rubber powder in asphalt has become a key issue of waste rubber modified a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L17/00C08J3/24C08K3/06C08K5/36C08K5/31
Inventor 余国贤周晓龙侍继东谭谦金亚清张双
Owner EAST CHINA UNIV OF SCI & TECH
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