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Rubber powder modified asphalt and preparation method thereof

A technology for modifying asphalt and rubber powder, which is applied in building components, building insulation materials, buildings, etc., which can solve the problems of difficult asphalt construction and poor stability, and achieve reduced construction difficulty, increased stability, and increased softening degree Effect

Inactive Publication Date: 2018-09-11
THE THIRD ENG CO LTD OF THE HIGHWAY ENG BUREAU OF CCCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, the modified asphalt has the technical problems of difficult construction and poor stability.

Method used

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  • Rubber powder modified asphalt and preparation method thereof

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preparation example Construction

[0029] The embodiment of the present invention also provides a kind of preparation method of rubber powder modified asphalt, it comprises:

[0030] S1: Heat rock asphalt to 170-210°C, add rubber powder and stir at a stirring speed of 2000-3000r / min to obtain the first mixture; heat rock asphalt to a high temperature state, so that the rheology of rock asphalt is enhanced. The machinability is improved.

[0031] S2: The first mixture is sheared at a shear rate of 4500-5000r / min for 45-50min, and after adding stabilizer, SBS modifier and PE modifier, it is obtained after stirring and developing at 170-200°C the second mixture;

[0032] S3: adding polyphosphoric acid to the second mixture and stirring at a speed of 500-600 r / min for 30-40 minutes to obtain the third mixture;

[0033] S4: add the third mixture to the solubilizer and aromatic oil, swell at a temperature of 170-200° C. for 40-50 minutes, and then continue to shear at a shear rate of 4500-5000 r / min for 45-50 minut...

Embodiment 1

[0045] This embodiment provides a rubber-modified asphalt, which is mainly prepared by the following method:

[0046] S1: 30 parts by weight of rock asphalt were heated to 170°C, then added to 10 parts of rubber powder, and stirred at a stirring speed of 2000r / min to obtain the first mixture;

[0047] Wherein, step S1 specifically includes:

[0048] S11: Pulverize rock asphalt and rubber powder to 30 meshes and set aside;

[0049] S12: heating the pulverized rock asphalt to 170° C., adding pulverized rubber powder and stirring at a stirring speed of 2000 r / min to obtain a first mixture.

[0050] S2: The first mixture was sheared at a shear rate of 4500r / min for 45min, and after adding 2 parts of stabilizer, 1 part of SBS modifier and 1 part of PE modifier in parts by weight, the Stirring at a speed of 2000r / min for 30min under the condition of 170°C to obtain the second mixture;

[0051] S3: Add 20 parts by weight of polyphosphoric acid to the second mixture and stir at a s...

Embodiment 2

[0057] This embodiment provides a rubber-modified asphalt, which is mainly prepared by the following method:

[0058] S1: 35 parts by weight of rock asphalt were heated to 190°C, then added to 25 parts of rubber powder, and stirred at a stirring speed of 2500r / min to obtain the first mixture;

[0059] Wherein, step S1 specifically includes:

[0060] S11: pulverize rock asphalt and rubber powder to 50 meshes and set aside;

[0061] S12: heating the pulverized rock asphalt to 190° C., adding pulverized rubber powder and stirring at a stirring speed of 2000-3000 r / min to obtain a first mixture.

[0062] S2: The first mixture was sheared at a shear rate of 4800r / min for 48min, and after adding 2.5 parts of stabilizer, 3 parts of SBS modifier and 1.5 parts of PE modifier in parts by weight, the Stirring at a speed of 2500 r / min for 35 minutes under the condition of 190 ° C to obtain the second mixture;

[0063] S3: Add 25 parts by weight of polyphosphoric acid to the second mixt...

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Abstract

The invention discloses rubber powder modified asphalt and a preparation method thereof, and relates to the technical field of modified asphalt. The provided rubber powder modified asphalt is mainly prepared from the following raw materials in parts by weight: 30 to 40 parts of rock asphalt, 20 to 30 parts of polyphosphoric acid, 10 to 50 parts of rubber powder, 2 to 3 parts of stabilizing agents,1 to 5 parts of SBS modifying agents, 1 to 2 parts of PE modifying agents, 1 to 10 parts of solubilizers and 1 to 3 parts of aromatic hydrocarbon oil. The rubber powder modified asphalt has the advantages that the construction difficulty is low; the needle penetration degree is reduced; the softening degree is increased; the stability is improved.

Description

technical field [0001] The invention relates to the technical field of modified asphalt, and in particular to a rubber powder modified asphalt and a preparation method thereof. Background technique [0002] As car ownership increases, so does the amount of used tires as solid waste. For the disposal of waste rubber tires, people have tried to bury or incinerate them, but burying will cause waste of land resources and special pollution. Incineration releases harmful substances that will cause air and groundwater pollution, aggravate global warming, and cannot fundamentally solve the problem of waste tire disposal. A large number of waste tires are piled up in the open air for a long time, which not only causes a great waste of resources, but also easily accumulates sewage to breed mosquitoes, spontaneously combusts and causes fires over time, and releases harmful gases to pollute the air when it slowly decomposes. Because the natural degradation process of waste tires is ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L19/00C08L53/02C08L23/06C08L91/00C08L71/02C08K13/02C08K3/32C08K3/06C08K3/30C08K5/053
CPCC08K2003/329C08L19/003C08L95/00C08L2201/08C08L2205/035C08L53/02C08L23/06C08L91/00C08L71/02C08K13/02C08K3/32C08K3/06C08K3/30C08K5/053
Inventor 王孟林张守昆唐有为
Owner THE THIRD ENG CO LTD OF THE HIGHWAY ENG BUREAU OF CCCC
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