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A kind of waste shoe sole rubber powder modified asphalt and preparation method thereof

A technology for modifying asphalt and rubber powder, applied in building components, building insulation materials, construction, etc., can solve the problems of difficult implementation, cumbersome sorting process of rubber powder by color, and few road paving materials.

Active Publication Date: 2021-04-23
TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent CN104558733A discloses a method for activating waste shoe sole rubber powder and its application. The waste shoe sole rubber powder is selected to remove impurities, classified according to color and crushed to 30-60 meshes. After the plasticizer is activated, the reclaimed rubber is prepared. This method can restore the performance of the reclaimed rubber after desulfurization and activation, but the process of sorting the rubber powder by color is cumbersome and difficult to implement.
[0005] At present, there are many methods of activating shoe sole rubber powder to prepare reclaimed rubber, but few of them apply it as an asphalt modifier to road paving materials.

Method used

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  • A kind of waste shoe sole rubber powder modified asphalt and preparation method thereof
  • A kind of waste shoe sole rubber powder modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The base asphalt is rapidly heated to 185-190° C., and the waste shoe sole rubber powder (the shoe sole rubber powder is a composition of rubber bottom, tendon bottom, EVA bottom, and TPR bottom) that accounts for 30% of the mass percentage of pitch is added therein with stirring. Mass ratio is 50:25:5:20), in the premixing tank, it was insulated and stirred by high-speed disperser for 15 minutes, and the stirring rate was 400r / min, and then it was sheared for 20 minutes through high-shear emulsifying machine, and the shear rate was 3000r / min, then stirred and developed in the reaction tank for 3 hours, the reaction temperature was kept at 180-185°C, and finally the cross-linking agent accounting for 0.15% of the mass percentage of the base asphalt was slowly added, and the waste shoe sole was obtained by continuing to heat and stir for 1 hour Rubber powder modified asphalt, testing its performance.

Embodiment 2

[0038] The matrix asphalt is rapidly heated to 185-190° C., and the waste shoe sole rubber powder (the shoe sole rubber powder is a composition of rubber bottom, tendon bottom, EVA bottom, and TPR bottom) that accounts for 15% of the mass percentage of the pitch is stirred and added therein. The mass ratio is 50:25:5:20), adding the waste tire rubber powder that accounts for 10% of the asphalt by mass percentage, in the premix tank, it was insulated and stirred by a high-speed disperser for 15 minutes, and the stirring speed was 400r / min, followed by High-shear mixing and emulsifying machine sheared for 20 minutes at a shear rate of 3000r / min, then stirred and developed in a reaction tank for 3 hours, and the reaction temperature was kept at 180-185°C. Slowly add the coupling agent, continue to keep warm and stir for 1 hour to prepare waste shoe sole rubber powder modified asphalt, and test its performance.

Embodiment 3

[0040]The base asphalt is rapidly heated to 185-190°C, and the SBS791-H that accounts for 3.5% by mass of the asphalt is added with stirring, and 10% of the mass percent of the asphalt is added at the same time. , at the bottom of beef tendon, at the bottom of EVA, at the bottom of TPR, its mass ratio is 50:25:5:20), in the premix tank, it was insulated and stirred by a high-speed disperser for 15 minutes, and the stirring speed was 400r / min, and then passed through The high-shear mixing emulsifier shears for 15 minutes at a shear rate of 3000r / min, then stirs and develops in the reaction tank for 3 hours, and the reaction temperature is kept at 175-180°C. Slowly add the joint agent, continue to keep warm and stir for 2 hours to prepare SBS composite waste shoe sole rubber powder modified asphalt, and test its performance.

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Abstract

The invention discloses a waste shoe sole rubber powder modified asphalt and a preparation method. The waste shoe sole rubber powder modified asphalt comprises the following components in terms of mass fraction: base asphalt: 100 parts; waste shoe sole rubber powder: 25-35 parts; Cross-linking agent: 0.15 to 0.525 parts. In the present invention, the waste shoe sole rubber powder is used in the asphalt as a modifier to effectively solve the problem of environmental pollution caused by waste shoe materials; Waterproof and interlayer adhesion of pavement, prolong the service life of asphalt pavement and reduce road noise. In addition, the compound modified asphalt of waste shoe sole rubber powder and waste tire rubber powder or SBS will greatly reduce the mixing amount of waste tire rubber powder and SBS and save costs.

Description

technical field [0001] The invention relates to the technical field of modified asphalt, in particular to waste shoe sole rubber powder modified asphalt and a preparation method thereof. Background technique [0002] With the development of the transportation industry, rubber powder modified asphalt, as a new type of road paving material, is more and more used in highway construction because it can significantly improve the high temperature stability and low temperature cracking performance of asphalt concrete. At present, most of the rubber powder used for modified asphalt is radial tire powder, and waste footwear is rarely recycled due to its low recycling price and low application value, so the general disposal methods are landfill, incineration or random disposal. If discarded, it will cause huge environmental pollution. If these waste shoe materials can be utilized, it will be of great significance in terms of environmental protection, humanity and resource conservatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L21/00C08L23/08C08K13/02C08K3/06C08K5/14C08K3/22C08K5/098
CPCC08K2201/014C08L95/00C08L2201/08C08L2205/025C08L2205/035C08L2312/00C08L21/00C08L23/0853C08K13/02C08K3/06C08K5/14C08K2003/222C08K2003/2296C08K5/098
Inventor 李翠红余强鄂志英
Owner TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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