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Asphalt modifier granule composition and preparation method thereof

A kind of technology of asphalt modifier and composition, which is applied in the direction of building structure, building components, building insulation materials, etc., can solve the problems of no thermal storage stability data, no further explanation of the degree of improvement, etc., to prevent long-term Floats on the asphalt surface for a long time, prevents rubber powder dust from flying, improves low temperature performance and elastic performance

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent only says that the storage stability of the product can be improved by using this method, and the degree of improvement is not further explained, and the thermal storage stability data is not involved in the examples.

Method used

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  • Asphalt modifier granule composition and preparation method thereof
  • Asphalt modifier granule composition and preparation method thereof
  • Asphalt modifier granule composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0032] Examples 1 to 4 prepared bitumen modified particle composition 1, bitumen modified particle composition 2, bitumen modified particle composition 3 and bitumen modified particle composition 4 respectively.

[0033] The laboratory uses the SHJ-30 twin-screw compounding extruder manufactured by Lanzhou Lantai Plastic Machinery Engineering Co., Ltd. to prepare the asphalt modifier granule composition. The specific proportion and preparation conditions are shown in Table 1. The percentage of the added amount is the mass percentage.

[0034] Table 1 Composition and preparation conditions of two kinds of asphalt modifier granule compositions

[0035]

[0036] The asphalt modifier granule composition prepared in the example of the present invention is used in the preparation of modified asphalt, illustrating the advantages of the asphalt modifier granule of the present invention.

Embodiment 5～8

[0040] Heat Huanxiling No. 90 base asphalt to 170°C, slowly add bitumen modifier granule compositions 1 to 4 obtained in the examples of the present invention, and shear at 180°C for 30 minutes at high speed (4000 rpm), Add sulfur cross-linking agent and stir for 1.5 hours to obtain waste rubber powder modified asphalt sample-2, sample-3, sample-4 and sample-5 respectively.

[0041] The specific proportions and test results of Comparative Example 1 and Examples 5-8 are shown in Table 2, wherein the percentages of the compositions are percentages by mass.

[0042] Table 2 Segregation test results of waste rubber powder modified asphalt

[0043]

[0044] Note: (1) The thermal storage stability test of waste rubber powder modified asphalt refers to the thermal storage stability method of JTG F40-2004SBS polymer modified asphalt.

[0045]It can be seen from Table 2 that after using the asphalt modifier particles of the present invention, after heat storage at 163°C for 48 hour...

Embodiment 9

[0049] In this example, the asphalt modifier particles 2 of the present invention are compounded with an appropriate amount of SBS to modify the asphalt. The method is as follows: first, heat Huanxiling No. 90 base asphalt to 170°C, and slowly add the asphalt modifier particles 2 of the present invention. , at 180°C, high-speed shear (rotating speed 4000 rpm) for 30 minutes, then add 2.5% (weight) of SBS (YH-791, produced by Yueyang Petrochemical, linear structure, block ratio (styrene S: butadiene Alkene B)=30:70) and sulfur crosslinking agent for 30 minutes and stirred for 2.5 hours to obtain composite modified asphalt sample-7.

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PUM

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Abstract

The invention discloses an asphalt modifier granule composition and a preparation method thereof. The composition comprises the following components by weight: 60 to 75 percent of waste rubber powder, 5 to 10 percent of rubber softening agent, 0.2 to 0.5 percent of active agent, 5 to 20 percent of latex and 0 to 10 percent of powdery rubber. The preparation method comprises the following steps of: mixing the latex and the waste rubber powder uniformly, mixing the active agent and the rubber softening agent, and simultaneously conveying the two mixtures into an extruder respectively to obtain the asphalt modifier granule composition. The asphalt modifier granules keep original certain elasticity of the waste rubber powder, and recover partial plasticity; and the surface of partial waste rubber powder is tightly adhered with certain powdery rubber or latex by blending extrusion, the powdery rubber or the latex adhered on the waste rubber powder added into the asphalt can be well cross-linked under the action of a cross-linker, and the waste rubber powder can be uniformly and stably dispersed in the asphalt by the 'bridge' effect.

Description

technical field [0001] The invention relates to an asphalt modifier granule composition and a preparation method thereof, in particular to a waste rubber powder modifier granule, which is used for modifying asphalt. Background technique [0002] With the development of the automobile industry, the "black pollution" formed by more and more waste tires is threatening our living environment. Waste tires are industrial hazardous solid wastes, and the usual methods of solid waste disposal, such as landfilling and burning, are not applicable to waste tires. More and more waste tires are piled up in the open air for a long time, which not only takes up a lot of land, but also easily causes fires. Therefore, governments of various countries are urgently seeking ways to deal with waste tires. [0003] In addition to reclaimed tires, reclaimed rubber and thermal utilization can process a part of waste tires, making rubber powder from waste tires and applying them to asphalt material...

Claims

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Application Information

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IPC IPC(8): C08L7/00C08L9/06C08L9/00C08L47/00C08L9/02C08L7/02C08L11/02C08L9/04C08L9/08C08L33/00C08L25/08C08L25/06C08L95/00C08K5/375
Inventor 宁爱民张建峰刘树华
Owner CHINA PETROLEUM & CHEM CORP
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