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Modified asphalt composite particles based on waste rubber powder, and preparation method thereof

A technology of waste rubber powder and modified asphalt, which is used in building components, building insulation materials, buildings, etc., can solve the problems of increased product viscosity, increased construction cost, and cannot be too large, and achieves increased asphaltene content and improved road performance. Effectiveness of performance, reduction of gum content

Inactive Publication Date: 2019-09-20
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Poor storage and transportation stability
During the storage and transportation of SBS / waste rubber composite modified asphalt, waste rubber powder, SBS and base asphalt are prone to segregation, delamination and partial agglomeration, which makes the dispersion of waste rubber powder and SBS in base asphalt uneven and affects the modification. Application properties of asphalt
[0006] (2) High energy consumption
During the storage and transportation of SBS / waste rubber composite modified asphalt, it needs to be carried out at a relatively high temperature. In some cases, it needs to be mechanically stirred, and the energy consumption is relatively high.
[0007] (3) The initial investment is large, which is not conducive to promotion
The waste rubber compound modified asphalt production line has a high investment. Due to the poor storage stability and transportation stability, it is not suitable for long-term storage and long-distance transportation. When the production site is relatively dense, the production cost of the product is increased.
[0008] (4) The cost of SBS is relatively high, and extensive use increases the construction cost
The amount of rubber powder should not be too large. Waste rubber powder can significantly increase the viscosity of asphalt. When the amount of rubber powder is high, the viscosity of the product will increase sharply, and the mixing equipment and shearing equipment cannot meet the requirements of product production.

Method used

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  • Modified asphalt composite particles based on waste rubber powder, and preparation method thereof
  • Modified asphalt composite particles based on waste rubber powder, and preparation method thereof

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preparation example Construction

[0033] A kind of preparation method of the modified asphalt composite particle based on waste rubber powder, comprises the following steps:

[0034] First, weigh the following components in parts by weight: 30-50 parts of waste tire rubber powder, 30-50 parts of petroleum asphalt, 1-10 parts of natural asphalt, 8-18 parts of SBS, 1-8 parts Polyphosphoric acid, 1-10 parts of solubilizer and 1-6 parts of additives;

[0035] Then, heat the petroleum asphalt to 150-160°C, add it into the mixing kettle, then add waste tire rubber powder and solubilizer into the mixing kettle, mix it into a uniform mixture, and then pass it into the shearing machine or colloid mill. , after shearing or grinding, it enters the swelling tank, and after swelling and developing for 20 to 60 minutes, it is added to the mixer;

[0036] Finally, add the swollen mixture, SBS, polyphosphoric acid, natural asphalt, and additives into the mixer, mix and stir evenly, cool, grind fine powder, and granulate to o...

Embodiment 1

[0038] According to parts by weight, take 40 parts of 80-mesh waste tire rubber powder, 40 parts of Korean SK petroleum asphalt with a label of 90, 1 part of rock asphalt, 8 parts of SBS, 1 part of PPA with a phosphoric acid content of 110%, and 1 part of aromatic oil. , 1 part of sulfur powder. After heating the above-mentioned petroleum asphalt to 150°C, add it into the mixing kettle, add the waste tire rubber powder and aromatic oil into the mixing kettle, mix it into a uniform mixture, then pass the mixture into the shearing machine, and through the shearing process , enter the swelling tank, and swell and develop for 40 minutes; add the swollen mixture, rock asphalt, SBS, PPA with a phosphoric acid content of 110%, and sulfur into the mixing equipment, mix and stir evenly, cool, grind fine powder, and granulate. A road asphalt modified composite particle based on waste rubber is obtained.

Embodiment 2

[0040] According to parts by weight, get 50 parts of waste tire rubber powder of 40 mesh, 50 parts of blue refining petroleum asphalt marked as 110, 10 parts of lake asphalt, 18 parts of SBS, 8 parts of PPA with phosphoric acid content of 115%, 10 parts of aromatic oil , 6 parts of sulfur powder.

[0041]After heating the above-mentioned road petroleum asphalt to 160°C, add it into the mixing kettle, add waste tire rubber powder and aromatic hydrocarbon oil into the mixing kettle, mix it into a uniform mixture, then pass the mixture into the shearing machine, and pass through the shearing machine. Cut, put into the swelling tank, and swell and develop for 60 minutes; add the swollen mixture, lake asphalt, SBS, polyphosphoric acid, and sulfur powder into the mixer, mix and stir evenly, cool, grind fine powder, and granulate to obtain a A road asphalt modified composite particle based on waste rubber.

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Abstract

The invention provides modified asphalt composite particles based on waste rubber powder, and a preparation method thereof. The modified asphalt composite particles comprise, by weight, 30-50 parts of waste tire rubber powder, 30-50 parts of petroleum asphalt, 1-10 parts of natural asphalt, 8-18 parts of SBS, 1-8 parts of polyphosphoric acid, 1-10 parts of solubilizers and 1-6 parts of auxiliaries. The products prepared by the preparation method are granular, have high stability, and can be stored for a long time and transported at a long distance; the compatibility of components of the obtained products is high, separating and layering are avoided, and the problem of poor storage and transport stability of existing waste rubber composite modified asphalt is solved.

Description

technical field [0001] The invention relates to the field of preparation of road asphalt modified materials, in particular to a road asphalt modified composite particle based on waste rubber powder and a preparation method thereof Background technique [0002] With the vigorous development of my country's transportation infrastructure, asphalt pavement is widely used in high-grade pavement, due to heavy traffic, channelized traffic and high temperature and insufficient high temperature stability of asphalt mixture, it is easy to cause deformation of asphalt pavement, the direct consequence of pavement deformation is Rutting on the road surface affects the smoothness of the road surface and degrades the performance and service quality of the road surface. Especially in hot and humid areas, the problem of rutting is more prominent, which shortens the service life of asphalt pavement and greatly increases the maintenance cost. In recent years, modified asphalt technology has de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L19/00C08L95/00C08L53/02C08K3/32
CPCC08K2003/329C08L19/003C08L95/00C08L2201/08C08L2205/025C08L2205/035C08L2207/20C08L53/02C08K3/32
Inventor 马峰杨田田傅珍代佳胜潘健
Owner CHANGAN UNIV
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