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High-concentration modifying rubber powder and preparation method thereof

A modified rubber powder, high-concentration technology, applied in building components, building insulation materials, construction, etc., can solve the problems of low consumption of rubber powder, impact of rubber powder asphalt performance, long processing time, etc., to improve storage Stability, enhanced compatibility, reduced absorption effects

Active Publication Date: 2013-10-09
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 has the advantages of environmental protection and economy, but the amount of waste rubber powder added in the current waste rubber powder modified asphalt technology is about 15% to 25%, and the consumption of rubber powder is not very huge
Due to the three-dimensional network structure of the rubber powder, in order to ensure its full swelling in the asphalt in the wet process, it often takes a long processing time, so it also brings inconvenience to the actual production
For the dry process, insufficient swelling also has a negative impact on the performance of rubber powder asphalt

Method used

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  • High-concentration modifying rubber powder and preparation method thereof
  • High-concentration modifying rubber powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 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 stir until dispersed, store at room temperature for 48 hours, and obtain the modified rubber powder for high-performance and high-filling asphalt.

Embodiment 2

[0029] 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 machine shears and blends the premixed rubber powder and 15 parts of filling barrier agent, then stirs until dispersed, and stores it at room temperature for 48 hours to obtain the modified rubber powder for high-performance and high-filling asphalt.

Embodiment 3

[0031] 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 stirred until dispersed, and stored for 48 hours to obtain a modified rubber powder for high-performance and high-filling asphalt.

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Abstract

The invention relates to a high-concentration modifying rubber powder and a preparation method of the high-concentration modifying rubber powder, belonging to the field of modified asphalts for road building. According to the problems that the rubber powder using amount is not large in the existing technology of rubber powder for modifying the asphalt, and the secondary pollution and the high energy consumption exist in wet modification, a rubber pre-processing method is adopted to prepare the modifying rubber powder, and when the modifying rubber powder and the asphalt are mixed together through a high-speed shearing method to prepare the high-concentration rubber powder modified asphalt, the filling amount of the modifying rubber powder is more than 50 parts. The preparation process of the modifying rubber powder is simple, the rubber powder using amount is large, the performance is excellent, the cost performance is high, and the high-concentration modifying rubber powder has important social significance and important environmental-protection value.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L21/00C08L95/00C08L83/04C08K5/09C08K5/01C08J11/06
CPCY02W30/62
Inventor 董大伟郑广宇江宽刘晶晶李晓林张立群
Owner CHINA RUBBER RESOURCE REGENERATION QINGDAO
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