Rubber asphalt and preparation method thereof

A technology of rubber asphalt and rubber, which is applied in the field of rubber asphalt and its preparation, can solve the problems of re-aging of active groups, affecting the service life of the road surface, and long production cycle, and achieve chemical stability of the colloid system, enhanced workability, and good compatibility effect

Active Publication Date: 2016-07-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of rubber powder activation, desulfurization and other methods has improved the problems of compatibility and stability to a certain extent and achieved certain results, but there are still problems such as complex process, long production cycle, and large equipment investment, and rubber asphalt and ordinary asphalt There is also the problem of aging. The aging of asphalt is a gradual process, and its rate directly affects the service life of t

Method used

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  • Rubber asphalt and preparation method thereof
  • Rubber asphalt and preparation method thereof
  • Rubber asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0055] Example 1

[0056] Heat the mixture of No. 30 straight-run asphalt and No. 90 blended asphalt (weight ratio 3:7) with 78.4% of the total mass of rubber asphalt to 120℃ on a heating mantle, and add 21% of the total mass of rubber asphalt with 80 mesh waste while stirring. Tire rubber powder and 0.1% n-dodecanethiol, rotating speed of 1300 rpm, stirring for 5 minutes, to form a well-mixed mixture. When the temperature rises to 180°C, use a high-shear dispersing emulsifier to perform high-speed shearing and stirring for 15 minutes. During the shearing process, the temperature is controlled at (180±3)°C, the speed is 3000 revolutions / min, and the total mass of rubber asphalt is added. 0.5% 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline and 3-hydroxybutyraldehyde-α-naphthylamine mixture (ratio 1:1) with a stirrer Stir and control the temperature at (180±3)°C during the stirring reaction, and the stirring time is 3 hours to obtain the rubber asphalt product.

Example Embodiment

[0057] Example 2

[0058] Heat 75% of the total mass of asphalt rubber with No. 70 blended asphalt on a heating mantle to 130°C, add 24% of the total mass of asphalt rubber with 60 mesh waste tire rubber powder and 0.5% of rubber activator 480 while stirring, and rotate at 1300 Rpm, stirring for 10 minutes to form a well-mixed mixture. When the temperature rises to 180°C, use a high-shear dispersing emulsifier to perform high-speed shearing and stirring for 10 minutes. During the shearing process, the temperature is controlled at (180±3)°C, the speed is 4000 rpm, and then the total mass of rubber asphalt is added. The mixture of 0.5% acetaldehyde-α-naphthylamine condensate and N-phenyl-α-naphthylamine (ratio 1:1) is stirred with a stirrer, and the temperature is controlled at (180±3)℃ during the stirring reaction. The time is 3 hours to get the rubber asphalt finished product.

Example Embodiment

[0059] Example 3

[0060] Heat 75.5% of the total mass of asphalt rubber on No. 50 oxidized asphalt on a heating mantle, and add 23% of the total mass of rubber asphalt, 60 mesh waste tire rubber powder and 0.5% of xylene disulfide and phenol disulfide while stirring. A mixture of sulfides (ratio 1:1), rotating at 1000 rpm, and stirring for 10 minutes to form a homogeneous mixture. When the temperature rises to 180°C, use a high-shear dispersing emulsifier to perform high-speed shearing and stirring for 15 minutes. During the shearing process, the temperature is controlled at (180±3)°C, the speed is 3000 revolutions / min, and the total mass of rubber asphalt is added. The mixture of 1% acetaldehyde-α-naphthylamine condensate' and N-phenyl-β-naphthylamine (ratio 1:1) is stirred with a stirrer, and the temperature during the stirring reaction is controlled at (180±3)℃, The mixing time is 2 hours, and the finished rubber asphalt is obtained.

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Abstract

The invention relates to rubber asphalt. The rubber asphalt is compounded from the following ingredients: base asphalt, waste rubber powder, an activating and recycling agent and a fixing and anti-aging agent. Accounted by total weight of the rubber asphalt, per 100% of the rubber asphalt comprises the ingredients in the following percentage: 70-89.4% of the base asphalt, 10-29.4% of the waste rubber powder, 0.1-1% of the activating and recycling agent and 0.5-1.5% of the fixing and anti-aging agent. A preparation method of the rubber asphalt comprises the following steps: heating the base asphalt to 120-160 DEG C; slowly adding the waste rubber powder and the activating and recycling agent into the heated base asphalt according to a certain proportion in a reaction kettle while stirring, wherein stirring speed is 300-1500 round/minute and stirring time is 5-20 minutes; raising temperature of the mixture to 170-180 DEG C, and performing high-speed shearing on the heated mixture by a shearing machine or a colloid mill for 5-30 minutes, wherein the shearing speed is 3000-5000 round/minute; and adding the fixing and anti-aging agent into the mixture and reacting the mixture while stirring for 2-5 hours. Compatibilities of the rubber powder and the asphalt are improved by the preparation method, so that the problem of instabilities of rubber asphalts in high-temperature storage is solved.

Description

technical field [0001] The invention relates to the technical field of road construction materials, in particular to a rubber asphalt and a preparation method thereof. Background technique [0002] Asphalt is an important road and construction material. In recent years, the rapid development of social economy has promoted the rapid improvement of the transportation industry and various grades of asphalt roads, which has led to the improvement of the performance requirements of asphalt pavement. Ordinary asphalt pavement is highly sensitive to temperature, and has disadvantages such as brittleness at low temperature, easy softening at high temperature, poor elasticity, and poor aging resistance. It is difficult to meet the requirements of modern high-grade highways for high and low temperature performance. Modification of asphalt. [0003] The so-called modified asphalt, according to the definition of my country's "Technical Specifications for Highway Modified Asphalt Pavem...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L17/00C08J11/10C08J11/28
CPCY02W30/62
Inventor 吕文姝王金勤蔺习雄熊良铨张艳莉
Owner PETROCHINA CO LTD
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