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Stable type finished warm-mixing rubber modified asphalt and preparation method thereof

A kind of rubber modified and stable technology, used in building insulation materials, building components, buildings and other directions, can solve the problems of poor aging resistance, high design requirements for mixture ratio, and difficult construction, and achieve the effect of wide application prospects.

Active Publication Date: 2014-04-09
南京宁通智能交通技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, rubber powder modified asphalt is attracting people's attention and attention because of its excellent performance and resource environmental protection, and it is gradually rising in China. However, rubber powder modified asphalt has unstable performance (poor storage stability), mixture ratio High design requirements and disadvantages are not easy to construct
SBS modified asphalt has been widely used for its excellent comprehensive performance, but it also has the disadvantages of high price and poor aging resistance

Method used

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  • Stable type finished warm-mixing rubber modified asphalt and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] The stable finished warm-mix rubber-modified asphalt of the present invention is composed of various components in mass fraction, 76% of 50# base asphalt, 1% of powdered styrene-butadiene rubber, 16% of 30-mesh desulfurized rubber powder, 1% of stable agent, 3% liquid polybutadiene rubber toughening agent and 3% solid oil volume warm mix agent. The stabilizer is composed of the following components in mass fraction, 2% sulfur, 2% divinylbenzene and 96% furfural oil.

[0031] The preparation process steps are as follows:

[0032] (1) Soak the 30-mesh desulfurization waste rubber powder in 50# base asphalt at 140°C for 25min to make it initially disperse and swell, and heat it in an oil bath;

[0033] (2) Homogenization treatment is carried out by using three-dimensional frequency conversion pre-shearing, and then the 50# base asphalt mixed with waste rubber powder is sheared and refined by a high-speed shearing emulsifier, the shearing speed is 3500rpm, and the shearing...

Embodiment 2

[0036] The stable finished warm-mix rubber-modified asphalt of the present invention is composed of various components in mass fraction, 78% of 50# base asphalt, 1% of powdered styrene-butadiene rubber, 16% of 30-mesh desulfurized rubber powder, 1% of stable agent, 2% liquid polybutadiene rubber toughening agent and 2% solid oil volume warm mix agent. The stabilizer is composed of the following components in mass fraction, 1.5% sulfur, 1.5% divinylbenzene and 97% furfural oil.

[0037] The preparation process steps are as follows:

[0038] (1) Soak the 30-mesh desulfurization waste rubber powder in 50# base asphalt at 140°C for 25min to make it initially disperse and swell, and heat it in an oil bath;

[0039] (2) Homogenize by using three-dimensional frequency conversion pre-shearing, and then use a high-speed shearing emulsifier to shear and refine the 50# base asphalt mixed with waste rubber powder, the shearing speed is 4000rpm, and the shearing temperature is 160℃:

[004...

Embodiment 3

[0042] The stable finished warm-mix rubber-modified asphalt of the present invention is composed of various components in mass fraction, 76% of 50# base asphalt, 0.5% of powdered styrene-butadiene rubber, 16% of 30-mesh desulfurized rubber powder, 1.5% of stabilized agent, 3% liquid polybutadiene rubber toughening agent and 3% solid oil volume warm mix agent. The stabilizer is composed of the following components in mass fraction, 1% sulfur, 2% divinylbenzene and 97% furfural oil.

[0043] The preparation process steps are as follows:

[0044] (1) Soak the 40-mesh desulfurization waste rubber powder in 50# base asphalt at 150°C for 30min to make it initially disperse and swell, and heat it in an oil bath;

[0045] (2) Homogenization treatment is carried out by using three-dimensional frequency conversion pre-shearing, and then the 50# base asphalt mixed with waste rubber powder is sheared and refined by a high-speed shearing emulsifier, the shearing speed is 3500rpm, and the ...

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Abstract

The invention discloses stable type finished warm-mixing rubber modified asphalt and a preparation method thereof. The modified asphalt comprises the following components in percentage by mass: 76-84% of matrix asphalt, 0.5-5% of modifier, 16-22% of waste rubber powder, 0.5-3% of stabilizer, 1-8% of toughener and 0.1-10% of warm mixing agent. According to the stable type finished warm-mixing rubber modified asphalt, the storage stability (especially high-temperature storage stability) of the modified rubber asphalt is improved through the mixture design, so that the modified asphalt is suitable for construction at a high / low temperature and especially suitable for construction in winter, high-temperature viscosity reduction and low-temperature viscosity increase; and the preparation process of the stable type finished warm-mixing rubber modified asphalt does not need special equipment, and is simple to operate, low in manufacturing cost and suitable for large-scale construction use.

Description

technical field [0001] The invention relates to a rubber asphalt, in particular to a stable finished warm-mix rubber modified asphalt and a preparation method thereof. Background technique [0002] With the development of the transportation industry, asphalt pavement occupies a large proportion in road engineering, but the base asphalt is highly sensitive to temperature, easy to deform at high temperature, and easy to crack at low temperature. Therefore, it must be modified to improve performance before it can be used. Large-scale construction use. The waste rubber powder contains various high molecular polymers such as styrene-butadiene rubber and natural rubber, as well as a large amount of carbon black, so the rubber powder can be used as an additive for modified asphalt. At present, rubber powder modified asphalt is attracting attention and attention due to its excellent performance and resource environmental protection, and it is gradually emerging in China. However, r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L9/06C08L9/00C08K3/06C08K5/1535
CPCY02A30/30
Inventor 蔡莉莉吴春颖李爱芳刘开琼于明明吕正龙
Owner 南京宁通智能交通技术研究院有限公司
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