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Method for modifying asphalt by using waste rubber

A technology of waste rubber and modified asphalt, applied in building components, building insulation materials, buildings, etc., can solve the problems of high technical requirements, large investment and high cost, and achieve good adhesion performance and low-temperature crack resistance, melting temperature Low, good weather resistance effect

Inactive Publication Date: 2015-06-03
大连轮胎有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The original shape reforming method can directly utilize waste tires, but the amount of utilization is limited; the pyrolysis method can produce fuel oil, carbon black, etc., but the technology is complicated, the cost is high, and it is easy to cause secondary pollution; the tire retreading method consumes less energy and has no pollution. However, the investment is large and the technical requirements are high; although the combustion method is simple, it releases harmful gases and causes serious secondary pollution
These methods recycle a part of waste tires to a certain extent, but the number of waste tires is limited. With the rapid development of the automobile industry, it is gradually unable to catch up with the amount of waste tires. Therefore, it is necessary to find more effective and large-scale utilization of waste tires. tire way

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The method for utilizing waste rubber modified asphalt comprises the following steps:

[0017] ①Wash the waste rubber, dry it naturally, remove metal and fiber debris after preliminary crushing, and set aside;

[0018] ②The waste rubber after the above treatment was crushed into rubber powder, added ferrous sulfate, and activated at 150°C for 2 hours; the added amount of the ferrous sulfate was 0.1% of the mass of the rubber powder.

[0019] ③Add asphalt matrix and rubber regeneration reducing agent PTC-R to the product of step ②, and react at 200°C for 3 hours to obtain rubber-modified asphalt; The amount of PTC-R added is 0.5% of the mass of rubber powder.

Embodiment 2

[0021] The method for utilizing waste rubber modified asphalt comprises the following steps:

[0022] ①Wash the waste rubber, dry it naturally, remove metal and fiber debris after preliminary crushing, and set aside;

[0023] ② The waste rubber after the above treatment was crushed into rubber powder, added ferrous nitrate, and activated at 160°C for 0.5h; the added amount of ferrous sulfate was 0.5% of the mass of rubber powder.

[0024] ③Add asphalt matrix and rubber regeneration reducing agent PTC-R to the product of step ②, and react at 200°C for 3-5 hours to obtain rubber-modified asphalt; The adding amount of reducing agent PTC-R is 1% of the mass of rubber powder.

Embodiment 3

[0026] The method for utilizing waste rubber modified asphalt comprises the following steps:

[0027] ①Wash the waste rubber, dry it naturally, remove metal and fiber debris after preliminary crushing, and set aside;

[0028] ② The waste rubber after the above treatment was crushed into rubber powder, added ferrous nitrate, and activated at 160°C for 2 hours; the amount of ferrous sulfate added was 0.8% of the mass of rubber powder.

[0029] ③Add asphalt matrix and rubber regeneration reducing agent PTC-R to the product of step ②, and react at 200°C for 4 hours to obtain rubber-modified asphalt; The amount of PTC-R added is 0.8% of the rubber powder mass.

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PUM

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Abstract

The invention provides a method for modifying asphalt by using waste rubber, which comprises the following steps: pulverizing pretreated waste rubber into rubber powder, adding ferrite, and activating at 150-160 DEG C for 0.5-2 hours; and adding an asphalt matrix and a rubber regeneration reducer, and reacting at 200 DEG C for 3-5 hours to obtain the rubber modified asphalt. The asphalt modification method is simple in technique, and does not need continuous high-temperature heating in the construction and use process. The modified asphalt has the advantages of low melting temperature, low aging tendency, favorable adhesion property and favorable low-temperature crack resistance, and various indexes can satisfy the technical requirements specified by Ministry of Communications.

Description

technical field [0001] The invention belongs to the technical field of resource recycling and asphalt materials, and in particular relates to a method for producing modified asphalt by using waste rubber. Background technique [0002] At present, most of the existing modified asphalt in my country adopts physical modification technology to realize the modification of asphalt by polymer, such as heating and stirring, shearing, colloid mill, etc. Although the method of physical modification can improve the performance of asphalt, the overall performance has not been fundamentally improved. There is only partial adsorption and mutual solubility between the polymer and asphalt, but not complete melting. This system is a thermodynamically unstable system, which is prone to separation between the two phases, resulting in segregation; once the external force stops acting on the modified asphalt product processed on site, the polymer will separate from the asphalt and float on the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08K3/30C08K3/28C08K3/16
Inventor 付兴铎高阳
Owner 大连轮胎有限公司