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Modified asphalt as well as preparation method and application thereof

A technology for modifying asphalt and petroleum asphalt, applied in building components, building insulation materials, buildings, etc., can solve the problems of large amount of polyurethane doping, need to be improved, poor flexibility, etc., achieve good interaction and achieve sustainable development , the effect of excellent high temperature stability

Active Publication Date: 2022-01-14
长春建业集团股份有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN 102850506A discloses a method for preparing polyurethane-modified asphalt. The reaction temperature of this method is 70-130°C, which improves the low-temperature brittleness and poor flexibility of ordinary asphalt.
[0004] Although the above-mentioned prior art has better improvements in high temperature stability, the improvement in low temperature stability and low temperature crack resistance still needs to be improved, and it is not suitable for seasonally frozen areas. At the same time, the doping of polyurethane The quantity is too large, which increases the cost

Method used

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  • Modified asphalt as well as preparation method and application thereof

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preparation example Construction

[0036] The raw materials for preparing the modified asphalt provided by the invention include base asphalt. The parts by weight of the base pitch are 20-80 parts. In some embodiments of the present invention, the base asphalt has 78, 73 or 69 parts by weight.

[0037] In some embodiments of the present invention, the base asphalt includes at least one of 50# petroleum asphalt, 70# petroleum asphalt, 90# petroleum asphalt and 110# petroleum asphalt; preferably 70# petroleum asphalt or 90# petroleum asphalt . The present invention does not have special restriction to the source of described matrix bitumen, adopts the commercially available commodity of 50# petroleum pitch, 70# petroleum pitch, 90# petroleum pitch and 110# petroleum pitch well known to those skilled in the art.

[0038] The raw material for preparing the modified asphalt provided by the invention also includes polyurethane elastomer. The parts by weight of the polyurethane elastomer are 1.5 to 6 parts. In som...

Embodiment 1

[0071] 1) Heating 78 parts by weight of 70# petroleum asphalt to 170°C and adding it to the colloid mill;

[0072] 2) Add 18 parts by weight of 40-mesh rubber powder and 1.5 parts by weight of sulfur-containing stabilizer to the colloid mill, and mix and grind for 30 minutes at 160° C. at a speed of 600 r / min to obtain a modified material;

[0073] 3) Put the modified material obtained in step 2) in the development tank, and develop it at 180°C for 90 minutes under the condition of stirring (100r / min);

[0074] 4) Add the modified material developed in step 3) and 2.5 parts by weight of polyurethane elastomer to the colloid mill respectively, and mix and grind for 30 minutes at 180° C. at a speed of 600 r / min to obtain modified asphalt.

Embodiment 2

[0076] 1) Heat 73 parts by weight of 90# petroleum asphalt to 180°C and add it to the colloid mill;

[0077] 2) Add 22 parts by weight of 40-mesh rubber powder and 2 parts by weight of sulfur-containing stabilizer to the colloid mill respectively, and mix and grind for 50 minutes at 160° C. at a speed of 600 r / min to obtain a modified material;

[0078] 3) Put the modified material obtained in step 2) in the development tank, and develop it at 180°C for 90 minutes under the condition of stirring (100r / min);

[0079] 4) Add the modified material developed in step 3) and 3 parts by weight of the polyurethane elastomer into the colloid mill respectively, and mix and grind for 30 minutes at 180° C. at a speed of 600 r / min to obtain modified asphalt.

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Abstract

The invention relates to the technical field of transportation engineering construction, and in particular, relates to modified asphalt as well as a preparation method and application thereof. The modified asphalt is prepared from the following raw materials in parts by weight: 20-80 parts of matrix asphalt, 1.5-6 parts by weight of a polyurethane elastomer, 5-40 parts by weight of waste rubber powder, and 1-5 parts by weight of a sulfur-containing stabilizer. The modified asphalt provided by the invention adopts the components with specific contents, can realize good interaction, has good comprehensive pavement performance, has better high-temperature stability, deformation recovery performance, low-temperature flexibility and low-temperature anti-fatigue durability, and is suitable for seasonal frozen regions. Moreover, the used material source is wide, the waste rubber material is fully utilized, and the utilization ratio of the renewable waste material in the road engineering can be greatly improved, so that the sustainable development of the road engineering can be realized.

Description

technical field [0001] The invention relates to the technical field of traffic and transportation engineering construction, in particular to a modified asphalt, its preparation method and application. Background technique [0002] At present, the highway mileage in our country is increasing rapidly. More than 90% of the highways in our country are asphalt pavements. The rapid development of highways urgently needs a large amount of high-quality asphalt materials. Statistics show that more than 400 tons of asphalt are needed for the construction of highways per kilometer. The quality of asphalt determines the quality of asphalt pavement. In addition, the non-renewable nature of petroleum resources limits the unsustainability of existing road construction and maintenance models, making the sustainable development of road engineering a huge challenge. Therefore, the research and development of new petroleum asphalt substitute products has become the top priority of research in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L75/04C08L19/00
CPCC08L95/00C08L2205/03C08L2201/08C08L75/04C08L19/003
Inventor 陈世达栾海孙志伟魏利德刘畅张有昌杨雷常玉丽孙显奎田巍吴元超
Owner 长春建业集团股份有限公司
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