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Method for preparing rubber powder masterbatch capable of quickly dispersing modified asphalt

A technology for modifying asphalt and rubber powder, which is applied in the field of asphalt modification, which can solve the problems of cost increase, time-consuming, complicated operation, etc., and achieve the effects of less material consumption, convenient transportation and simple process

Inactive Publication Date: 2009-10-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is complicated to operate and takes too much time in industrial production, resulting in increased costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] In parts by mass, add 100 parts of 40-mesh rubber powder, 50 parts of asphalt, 20 parts of wax and 10 parts of carboxylated nitrile rubber modifier into the rubber mixer, blend at 60°C for about 15 minutes, and then extrude granulation to obtain rubber powder masterbatch.

[0027] Heat and melt 100 parts of asphalt, add 33 parts of the rubber powder masterbatch prepared by the above method, and stir and mix at 200°C for 1 minute to obtain a uniform rubber powder modified asphalt product.

[0028] The properties of rubber powder modified asphalt products are as follows: the softening point is 60.6°C, the ductility at 5°C is 21.02cm, and the penetration is 58.3dmm.

Embodiment 2

[0030] According to the number of parts by mass, add 100 parts of 80 mesh rubber powder, 100 parts of asphalt, 10 parts of wax and 20 parts of ethylene-vinyl acetate copolymer modifier to the rubber mixer, and blend at 65 ° C for about 25 minutes , and then extruded and granulated to obtain a rubber powder masterbatch.

[0031] Heat and melt 100 parts of asphalt, add 35 parts of the rubber powder masterbatch prepared by the above method, and stir and mix at 200°C for 1 minute to obtain a uniform rubber powder modified asphalt product.

[0032] The properties of the rubber powder modified asphalt product are as follows: the softening point is 64.1°C, the ductility at 5°C is 19.72cm, and the penetration is 46.7dmm.

Embodiment 3

[0034] According to the number of parts by mass, 100 parts of 120 mesh rubber powder, 200 parts of asphalt, 10 parts of wax and 40 parts of modifier polyethylene were added to the rubber mixer, blended at 80 ° C for about 30 minutes, and then extruded to make granules to make rubber powder masterbatch.

[0035]Heat and melt 100 parts of asphalt, add 38 parts of the rubber powder masterbatch prepared by the above method, and stir and mix at 200°C for 1 minute to obtain a uniform rubber powder modified asphalt product.

[0036] The properties of rubber powder modified asphalt products are as follows: the softening point is 61.2°C, the ductility at 5°C is 20.03cm, and the penetration is 49.9dmm.

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Abstract

The invention provides a method for preparing a rubber powder masterbatch capable of quickly dispersing modified asphalt and belongs to the technical field of asphalt modification. The prior art has the problems of poor mutual solubility of rubber powder and asphalt, complex preparation process, and the like. The method comprises the following steps that: by weight portion, 100 portions of rubber powder, 50 to 200 portions of asphalt, 10 to 40 portions of modifying agent and 10 to 20 portions of wax are put into a rubber refining machine to be mixed at a temperature of between 60 and 80 DEG C for 15 to 35 minutes, and then extruded and granulated to prepare the masterbatch with high rubber powder content. The rubber powder masterbatch can be directly applied to the material mixing stage, and be dispersed in the asphalt within one minute at a temperature below 200 DEG C with excellent modification effect.

Description

technical field [0001] The invention belongs to the technical field of asphalt modification, and in particular relates to a preparation method of a rubber powder masterbatch capable of rapidly dispersing modified asphalt. Background technique [0002] Since the reform and opening up, the rapid development of the national economy has driven the continuous increase of China's road traffic flow and the average load of road vehicles. At the same time, in order to meet the needs of market economy integration for a rapid and stable supply of materials, the construction mileage of high-grade roads continues to grow rapidly every year. In the new century, in order to respond to the western development strategy, road construction in special areas such as high coldness and high temperature difference between day and night in the west urgently needs high-performance pavement materials. However, the traditional road asphalt can no longer meet the requirements due to its high temperatur...

Claims

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Application Information

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IPC IPC(8): C04B26/26
Inventor 张立群黄小溪李晓林张跃谢玮曹贵昌
Owner BEIJING UNIV OF CHEM TECH
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