Concentrated composition of waste rubber composite modified pitch and preparation and use method

A technology for compounding modified asphalt and waste rubber, which is used in building structures, building components, building insulation materials, etc., can solve the problem that mixing equipment and shearing equipment cannot meet product production, and are not suitable for long-term storage and long-distance transportation and storage. problems such as poor stability and transportation stability, to achieve the effect of increasing high temperature rutting resistance, improving driving comfort and safety, and good stability

Inactive Publication Date: 2010-06-02
CHANGAN UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Poor storage and transportation stability
During the storage and transportation of waste rubber composite modified asphalt, waste rubber powder, additives and base asphalt are prone to segregation, delamination and partial agglomeration, which makes the dispersion of waste rubber powder and additives in base asphalt uneven, affecting the performance of modified asphalt. application performance
[0007] 2. High energy consumption
During the storage and transportation of 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.
[0008] 3. The initial investment is large, which is not conducive to promotion
Waste rubber composite modified asphalt production line has a high investment. Due to poor storage 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.
[0009] Fourth, product quality control is difficult
There are many factors affecting the quality of waste rubber compound modified asphalt products, such as production site, equipment, process flow, parameters and raw materials, etc., the current scattered production mode of waste rubber compound modified asphalt is difficult to control the quality of the product from the source
[0010] 5. Single product performance
Waste rubber composite modified asphalt can improve the elastic recovery performance of asphalt, but the other properties of asphalt are not significantly improved, especially the ductility of asphalt. Although it has a certain improvement effect, it still cannot reach the standard of excellent modified asphalt. Limit the scope of application of the product
[0011] In addition, the existing waste rubber composite modified asphalt technology still has the defect that the amount of rubber powder should not be too high
Due to the obvious viscosifying effect of waste rubber powder on asphalt, when the rubber powder content is high, the viscosity of the product increases sharply, and the mixing equipment and shearing equipment cannot meet the requirements of product production

Method used

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  • Concentrated composition of waste rubber composite modified pitch and preparation and use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] According to parts by weight, get 40 parts of 80 mesh waste tire rubber powder, 40 parts of Korean SK petroleum asphalt with the label of 90, 5 parts of rock asphalt, 5 parts of SBR, and the density is 0.92g / cm 3 5 parts of PE, 5 parts of aromatic oil, 4 parts of sulfur powder.

[0043] After heating the above-mentioned petroleum asphalt to 150°C, add it into the mixing kettle, add waste tire rubber powder and aromatic oil into the mixing kettle, mix it into a uniform mixture, and then pass the mixture into the shearing machine, and after shearing , into the swelling tank, swelling and development for 40 minutes; the swollen mixture, rock asphalt, SBR, density of 0.92g / cm 3 The low-density PE and sulfur are added into the stirring equipment, and the concentrated composition of waste rubber composite modified asphalt is prepared.

[0044] The base asphalt is heated to 145°C, and the prepared waste rubber composite modified asphalt concentrated composition and base aspha...

Embodiment 2

[0046] According to parts by weight, get 50 parts of 20 mesh waste tire rubber powder, 50 parts of blue refining petroleum asphalt whose label is 110, 10 parts of lake asphalt, 10 parts of CR, 10 parts of waste polyethylene, 10 parts of aromatic oil, 8 parts of carbon black .

[0047] 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, enter the swelling tank, and swell and develop for 60 minutes; add the swollen mixture, lake asphalt, CR, waste polyethylene, and carbon black powder into the mixer to prepare a concentrated composition of waste rubber composite modified asphalt.

[0048] Heat the base asphalt to 160°C, add the prepared concentrated composition of waste rubber composite modified asphalt to the base asphalt in a wei...

Embodiment 3

[0050] According to parts by weight, get 30 parts of 100 mesh waste tire rubber powder, 30 parts of Karamay petroleum asphalt with the label of 50, 1 part of rock asphalt, 1 part of SBR, 1 part of polyolefin wax, 1 part of furfural extraction oil, and 1 part of sulfur powder .

[0051] After heating the above-mentioned road petroleum asphalt to 120°C, add it into the mixing kettle, add the waste tire rubber powder and furfural oil into the mixing kettle, mix it into a uniform mixture, then pass the mixture into the shearing machine, and Cut, enter the swelling tank, and swell and develop for 20 minutes; add the swollen mixture, rock asphalt, SBR, polyolefin wax, and sulfur powder into the mixer to prepare a concentrated composition of waste rubber composite modified asphalt.

[0052] Heat the base asphalt to 130°C, add the prepared waste rubber composite modified asphalt concentrated composition and base asphalt in a weight ratio of 1:1, add them to the modified asphalt produc...

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Abstract

The invention belongs to the technical field of road engineering materials, in particular to a concentrated composition of waste rubber composite modified pitch and a preparation and use method. The concentrated composition is prepared from waste tire rubber powder, petroleum pitch, natural pitch, synthetic tuber, polyolefin, a swelling agent and an aid by preparing procedures. When in use, a product can be proportionally mixed with substrate pitch on a construction site to prepare waste rubber composite modified pitch for spraying construction or be mixed and stirred with the substrate pitch at a pitch mixture stirring station into a rubber pitch mixture for paving construction.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and in particular relates to a concentrated composition of waste rubber composite modified asphalt and a preparation and use method. Background technique [0002] Waste rubber composite modified asphalt is prepared by mixing appropriate amount of waste rubber powder and additives into matrix asphalt, and then going through stirring, homogenizing, shearing, grinding, swelling, development and other processes at an appropriate temperature and time. Multiphase dispersion system of rubber asphalt. Waste rubber powder can be divided into waste tire rubber powder, waste shoe rubber powder and leftover rubber powder according to different sources. [0003] With the rapid development of the automobile industry, the accumulation of waste tires is increasing, and has developed into "black solid waste" that endangers the environment. Waste tires contain a large amount of polymer rubber ...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L9/06C08L11/00C08L23/06
Inventor 徐培华徐玮商博明蔡乾东贾晓放
Owner CHANGAN UNIV
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