High-concentration crumb rubber modified asphalt and preparation method thereof

A modified asphalt, high-concentration technology, applied in building components, building insulation materials, construction, etc., can solve the problems of unscientific influence of rubber powder modified asphalt and asphalt mixture, long processing cycle, limited swelling of asphalt, etc. Achieve the effect of improving anti-segregation performance, great social significance and industry value, and large filling amount of rubber powder

Active Publication Date: 2012-07-11
CHINA RUBBER RESOURCE REGENERATION QINGDAO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It is obvious that waste rubber powder modified asphalt has the advantages of environmental protection and economy, but the current waste rubber powder modified asphalt technology adds about 15% to 25% of waste rubber powder, and the processing cycle is long, generally it takes several hours, its advantages are 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 and asphalt mixture The impact is unscientific

Method used

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  • High-concentration crumb rubber modified asphalt and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] According to the number of parts by mass, put 100 parts of waste rubber powder in the reactor, first stir at 400r / min at a low speed for 3min, then stir at a high speed of 600r / min for 1min, and raise the temperature to 45°C, and fill 45 parts of the preheated to 50°C Spray the barrier agent (silicone oil: linolenic acid = 2:1) into the above waste rubber powder, stir at 1200r / min at a high speed for 5min at a temperature of 55°C, cool with air for 2min, and store for 48h when the temperature drops to 40°C , and then use a double-roll mill to shear and blend the premixed rubber powder and 10 parts of filling barrier agent, then disperse it, store it at room temperature for 48 hours, and obtain the modified rubber powder for high-performance and high-filling asphalt. 45 parts of rubber powder, 1 part of reinforcing agent and 100 parts of base asphalt were stirred at 170 °C for 15 minutes at a speed of 800 r / min and high-speed sheared at 10000 r / min for 45 minutes to obtai...

Embodiment 2

[0031] 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

[0033] 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 modified rubber powder for high-performance and high-filling asphalt was obtained after shearing treatment, dispersion, and storage for 48 hours. 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.

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Abstract

The invention relates to high-concentration crumb rubber modified asphalt and a preparation method thereof, and belongs to the field of modified asphalt for road construction. Aiming at the problems that the dosage of crumb rubber is not high enough in the traditional crumb rubber modified asphalt technology, and secondary pollution and high energy consumption exist in the wet method modification, the invention adopts a crumb rubber pretreatment method to prepare modified crumb rubber, and then the modified crumb rubber and a reinforcing agent are mixed with asphalt to prepare the high-concentration crumb rubber modified asphalt with a high-speed shearing method, and the filler content of the modified crumb rubber can reach more than 50 parts. The crumb rubber modified asphalt is simple in preparation technology, high in the dosage of the crumb rubber, superior in performance and high in cost performance, and has significant social meaning and environmental protection value.

Description

technical field [0001] The invention relates to a high-concentration rubber powder modified asphalt 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 are also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08L51/06C08L83/04C08K5/09C08K5/01
Inventor 董大伟郑广宇刘晶晶江宽李晓林张立群
Owner CHINA RUBBER RESOURCE REGENERATION QINGDAO
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