Stable finished warm-mix rubber-modified asphalt and preparation method thereof

A rubber modified and stabilized technology, which is applied in building insulation materials, building components, buildings, etc., can solve the problems of poor aging resistance, unstable performance of rubber powder modified asphalt, and high price, and achieve the effect of wide application prospects

Active Publication Date: 2016-05-11
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 finished warm-mix rubber-modified asphalt and preparation method thereof

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Experimental program
Comparison scheme
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# matrix asphalt, 1% of powdered styrene-butadiene rubber, 16% of 30-mesh desulfurized rubber powder, and 1% of stable Agent, 3% liquid polybutadiene rubber toughening agent and 3% solid oil-compatible warm mixing agent. Wherein 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 30-mesh desulfurized waste rubber powder in 50# matrix asphalt at 140°C for 25 minutes to make it initially disperse and swell, and heat it in an oil bath;

[0033] (2) First use three-dimensional frequency conversion pre-shearing for homogenization treatment, and then use a high-speed shearing emulsifier to shear and refine the 50# matrix asphalt mixed with waste rubber powder. The shearing speed is 3500rpm and th...

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, and 1% of stable Agent, 2% liquid polybutadiene rubber toughening agent and 2% solid oil-compatible warm mixing agent. Wherein 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 30-mesh desulfurized waste rubber powder in 50# matrix asphalt at 140°C for 25 minutes to make it initially disperse and swell, and heat it in an oil bath;

[0039] (2) First use three-dimensional frequency conversion pre-shearing for homogenization treatment, and then use a high-speed shearing emulsifier to shear and refine the 50# matrix asphalt mixed with waste rubber powder. The shearing speed is 4000rpm and th...

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# matrix asphalt, 0.5% of powdered styrene-butadiene rubber, 16% of 30-mesh desulfurized rubber powder, and 1.5% of stable Agent, 3% liquid polybutadiene rubber toughening agent and 3% solid oil-compatible warm mixing agent. Wherein 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 40-mesh desulfurized waste rubber powder in 50# matrix asphalt at 150°C for 30 minutes to make it initially disperse and swell, and heat it in an oil bath;

[0045] (2) First use three-dimensional frequency conversion pre-shearing for homogenization treatment, and then use a high-speed shearing emulsifier to shear and refine the 50# matrix asphalt mixed with waste rubber powder. The shearing speed is 3500rpm an...

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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 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 transportation, asphalt pavement accounts for a large proportion of road engineering, but the base asphalt is highly sensitive to temperature, easy to deform at high temperature, and easy to crack at low temperature, so it must be modified to improve performance. Large-scale construction use. Waste rubber powder contains various polymers such as styrene-butadiene rubber and natural rubber, and 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 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 (...

Claims

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Application Information

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Patent Type & Authority Patents(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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