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High-doping ratio rubber powder modified asphalt composition

A technology of modified asphalt and composition, which is applied in the direction of building structure, building components, building insulation materials, etc. It can solve the problem of uneven dispersion of rubber powder and matrix asphalt, low mixing strength of matrix asphalt and rubber powder, unfavorable long-term storage, etc. problems, to achieve good environmental protection and sustainable development, improve the secondary utilization rate, and increase the effect of mixing amount

Inactive Publication Date: 2015-11-11
TIANJIN HI TECH ENVIRONMENT DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional preparation method of rubber powder modified asphalt is to add rubber powder placed at room temperature to high temperature base asphalt, which causes premature aging of base asphalt, and the large temperature drop of the system after mixing base asphalt and rubber powder increases the viscosity , affecting the grinding efficiency; at the same time, the mixing intensity of matrix asphalt and rubber powder is small, resulting in uneven dispersion of rubber powder and matrix asphalt after stirring and melting, resulting in segregation, which is not conducive to long-term storage

Method used

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  • High-doping ratio rubber powder modified asphalt composition
  • High-doping ratio rubber powder modified asphalt composition

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0024] A high mixing ratio rubber powder modified asphalt composition, comprising the following components:

[0025] Base bitumen: 100 parts;

[0026] Rubber powder: 25-33 parts;

[0027] Activator: 2‰~5‰ of rubber powder mass;

[0028] Stabilizer: 0.3 to 0.5 parts.

[0029] Preferably, the component distribution ratio of the above asphalt composition is: base asphalt: 100 parts, rubber powder: 25-33 parts, activator: 3‰ of the rubber powder mass, and stabilizer: 0.4 parts.

[0030] The stabilizer is a mixture of sulfur, accelerator and anti-aging agent.

[0031] Preferably, the stabilizer is a mixture of sulfur, accelerator and anti-aging agent, and the mass ratio of the three is 5:1:1.

[0032] Wherein, the activator is 420, 480 or 580 commonly used by those of ordinary skill in the art; the accelerator is a commercially available product TMTD; 2-Naphthylamine.

[0033] The base asphalt is road petroleum asphalt.

[0034] Preferably, the specification of the rubber po...

Embodiment 1

[0042] According to the mass fraction, weigh each component of the rubber powder modified asphalt composition: 100 parts of No. 70 road petroleum asphalt, 25 parts of rubber powder (30 mesh), 3‰ of the rubber powder quality of activator (580), stable 0.4 parts of the agent.

[0043] The preparation method comprises the following steps:

[0044] (1) Select No. 70 road petroleum asphalt as the base asphalt, transport the base asphalt through an asphalt pump, measure it with a mass flow meter and heat it to 170°C through a heating system, and transport it to a continuous rapid mixing tank;

[0045] (2) After the rubber powder, stabilizer and activator are fully stirred and mixed according to a certain ratio, the temperature is raised to 60°C through the conveying auger, and then poured into the continuous rapid mixing tank already equipped with base asphalt for stirring and mixing. The mixing time is 10-30min, and the stirring speed is 3000r / min;

[0046] (3) Pump the mixture o...

Embodiment 2

[0049] According to the mass fraction, each component of the rubber powder modified asphalt composition was weighed: 100 parts of No. 70 road petroleum asphalt, 28 parts of rubber powder (40 mesh), 3‰ of the rubber powder quality of the activator (480), stable 0.4 parts of the agent.

[0050] The preparation method of above-mentioned rubber powder modified asphalt composition, comprises the following steps:

[0051] (1) Select No. 70 road petroleum asphalt as the base asphalt, transport the base asphalt through an asphalt pump, measure it with a mass flow meter and heat it to 170°C through a heating system, and transport it to a continuous rapid mixing tank;

[0052] (2) After the rubber powder, stabilizer and activator are fully stirred and mixed according to a certain ratio, the temperature is raised to 70°C through the conveying auger, and then poured into the continuous rapid mixing tank already equipped with base asphalt for stirring and mixing. The mixing time is 10-30m...

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Abstract

The invention discloses a high-doping ratio rubber powder modified asphalt composition, comprising the following components: 100 parts of matrix asphalt, 25-33 parts of rubber powder, activating agent of 0.2-0.5% of mass of the rubber powder, and 0.3-0.5 part of stabilizer. After the rubber powder and the activating agent are premixed, the doping mount is up to 25-30%, in the used stabilizer, besides sulphur, certain proportion of accelerant and anti-aging agent are also added; the asphalt composition has beneficial effects that adding mount of waste tire rubber powder is increased, and secondary use ratio of waste is improved; the anti-aging agent is added according to specific proportion, so attenuation of performances of the rubber powder modified asphalt is effectively inhibited, and the rubber powder modified asphalt and a mixture thereof can still keep good performances after storage for long time.

Description

technical field [0001] The invention relates to the technical field of asphalt in road engineering, in particular to a high-mixing rubber powder modified asphalt composition. Background technique [0002] With the development of the transportation industry, rubber powder modified asphalt has gradually emerged in China due to its excellent performance and resource environmental protection. A large number of patents and documents on rubber powder modified asphalt have also appeared. However, the traditional preparation method of rubber powder modified asphalt is to add rubber powder placed at room temperature to high temperature base asphalt, which causes premature aging of base asphalt, and the large temperature drop of the system after mixing base asphalt and rubber powder increases the viscosity , affecting the grinding efficiency; at the same time, the mixing intensity of matrix asphalt and rubber powder is small, resulting in uneven dispersion of rubber powder and matrix ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08K3/06C08K5/40C08K5/18
Inventor 李倩江宽余强
Owner TIANJIN HI TECH ENVIRONMENT DEV CO LTD