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High-concentration rubber powder modified asphalt mixture and preparation method thereof

A modified asphalt, high-concentration technology, which is applied in the field of high-concentration rubber powder modified asphalt mixture and its preparation, can solve the problems of unscientific influence of rubber powder modified asphalt mixture, long processing cycle, limited swelling of asphalt, etc. Achieve great social significance and industry value, save energy consumption and cost, and have the effect of large filling volume

Active Publication Date: 2012-07-25
CHINA RUBBER RESOURCE REGENERATION QINGDAO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is obvious that waste rubber powder modified asphalt mixture has the advantages of environmental protection and economy. However, the waste rubber powder added in the current waste rubber powder modified asphalt technology is about 15% to 25%, and the processing cycle is long. hours, its advantages are somewhat limited
The waste rubber powder forms a three-dimensional network structure through chemical bonding, and the swelling of asphalt during processing is very limited. For example, after mechanically increasing the amount of rubber powder without considering the increase in the amount, the rubber powder modified asphalt mixture will be produced. impact is unscientific

Method used

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  • High-concentration rubber powder modified asphalt mixture and preparation method thereof
  • High-concentration rubber powder modified asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] According to the number of parts by mass, put 100 parts of waste rubber powder in the reactor (commercially available product with high-speed stirring, exhaust, spraying and heating functions), first stir at 400r / min at low speed for 3min, and then at 600r / min for 1min at high speed , and heat up to 45°C to discharge impurities such as water vapor and dust adhering to the surface of the rubber powder, and spray 45 parts of filling barrier agent (silicone oil: linolenic acid = 2:1) preheated to 50°C into the above waste rubber powder In the process, at a temperature of 55°C, stir at a high speed of 1200r / min for 5min, adopt the method of blowing air from the bottom, air-cool for 2min, when the temperature drops to 40°C, store for 48h, and then use a double-roller open mill to mix the premixed The rubber powder and 10 parts of filling barrier agent are sheared and blended to speed up the diffusion rate of the modifier. The distance between the rollers is 0.2mm, the tempera...

Embodiment 2

[0035] According to the number of parts by mass, put 100 parts of waste rubber powder in the reactor, first stir at 500r / min at a low speed for 1min, and stir at a high speed of 800r / min for 3min, and raise the temperature to 45°C, and fill 55 parts of the preheated to 50°C (naphthenic oil: industrial oleic acid = 3:1) was sprayed into the above waste rubber powder, stirred at a high speed of 800r / min for 2min, air-cooled for 3min, and stored for 48h after the temperature was lowered to 40°C, and then kneaded with two rollers The premixed rubber powder and 15 parts of filling barrier agent were sheared and blended by the machine, then dispersed, and stored at room temperature for 48 hours, and the modified rubber powder for high-performance and high-filling asphalt was obtained. Mix 60 parts of rubber powder, 1 part of reinforcing agent and 100 parts of base asphalt at 170°C for 15 minutes at a speed of 800 r / min, and high-speed shear at 10,000 r / min for 45 minutes to obtain wa...

Embodiment 3

[0038] According to the number of parts by mass, put 100 parts of waste rubber powder in the reactor, firstly stir at 400r / min at low speed for 3min, then switch to 800r / min for 3min at high speed, and raise the temperature to 45°C, and preheat 70 parts of waste rubber powder to 60°C Fill the barrier agent (waste plastic pyrolysis oil: debasement asphalt = 4: 1), stir at 800r / min for 2 minutes, air-cool for 5 minutes, store for 48 hours, and then use a double-roller mill to mix the premixed rubber powder with 20 parts of the filling barrier The agent was sheared and blended, then dispersed, and stored for 48 hours to obtain a modified rubber powder for high-performance and high-filling asphalt. Mix 60 parts of rubber powder, 1 part of reinforcing agent and 100 parts of base asphalt at 180°C for 30 minutes at a speed of 1200 r / min, then shear for 45 minutes at a speed of 12000 r / min to obtain waste rubber powder modified asphalt binder.

[0039] The above rubber powder modified...

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Abstract

The invention relates to a high-concentration rubber powder modified asphalt mixture and a preparation method thereof, belonging to the field of road construction asphalt mixtures. A rubber powder pretreatment method is adopted for preparing modified rubber powder against the problems that the using quantity of a conventional rubber powder modified asphalt technology is not high enough, and secondary pollution and high energy consumption exist in wet-process modification, the modified rubber powder and a reinforcing agent are mixed with asphalt and stone to prepare the high-concentration rubber powder modified asphalt mixture, and the filling amount of the modified rubber powder is above 50 parts. The preparation process of the modified asphalt mixture is simple, the using quantity of therubber powder is large, the performances are excellent and the performance-price ratio is high so as to have important social significance and environment-friendly value.

Description

technical field [0001] The invention relates to a high-concentration rubber powder modified asphalt mixture and a preparation method thereof, which are used in road construction. Background technique [0002] The automobile industry and the transportation industry have gradually become the pillar industries of our country, so a large number of waste tires have also been produced. The complex three-dimensional network structure inside the rubber material in tires, and the addition of a large amount of fillers and softening oils and other substances greatly limit its recycling, and it is recognized that it is very reasonable to use waste tires to produce rubber powder. one of the effective ways. my country's expressway paving speed ranks first in the world, and its total mileage ranks second in the world. The rapid development of the highway industry has greatly promoted the development of pavement materials, and people's requirements for the performance of asphalt concrete a...

Claims

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Application Information

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IPC IPC(8): C04B26/26
Inventor 王珏郑广宇董大伟江宽刘晶晶李晓林张立群
Owner CHINA RUBBER RESOURCE REGENERATION QINGDAO
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