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SBS (styrene butadiene styrene) modified asphalt and preparation method thereof

A technology for modifying asphalt and asphalt, applied in building components, building insulation materials, buildings, etc., can solve the problems of long curing time, unfavorable production simplification, equipment wear, etc., to reduce segregation phenomenon, improve softening point, reduce needle In-degree effect

Inactive Publication Date: 2011-04-13
QINGDAO ANBANG LUFA ASPHALT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that after the shearing is completed, the aging time is too long. In addition, too much star-shaped polymer is used, and the shearing is performed before it is fully swollen, which leads to serious wear and tear on the equipment during the shearing process, which is not conducive to the promotion of production.
[0005] CN200510134354.6 adopts matrix method to prepare modified asphalt, and the shortcoming is that the preparation time of mortar mother liquor is too long (4.5~12 hours), and matrix method needs to mix through 2 times, and process is loaded down with trivial details, is unfavorable for the simplification of production

Method used

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  • SBS (styrene butadiene styrene) modified asphalt and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Ingredients: parts by weight of each component are: 92.4 parts of asphalt; 2.5 parts of SBS; 0.1 part of sulfur powder; 5 parts of nano-calcium carbonate.

[0035] Production process: first raise the temperature of the asphalt to 190°C, start stirring, put SBS into the mixing tank, and stir for 180 minutes, then pass the material in the mixing tank through the colloid mill (the speed of the colloid mill is 1 to 3 minutes / ton), and grind all the materials until they swell After the tank, add sulfur powder and nano-calcium carbonate, and stir for 60 minutes to obtain modified asphalt.

Embodiment 2

[0037] Ingredients: parts by weight of each component are: 97.4 parts of asphalt; 2.5 parts of SBS; 0.1 part of sulfur powder; 0 part of nano calcium carbonate.

[0038] Production process: first raise the temperature of the asphalt to 200°C, start stirring, put SBS into the mixing tank, stir for 120 minutes, then pass the material in the mixing tank through a high-speed shear machine, grind all the materials into the swelling tank, add sulfur powder, and stir for 90 minutes , to obtain modified asphalt.

Embodiment 3

[0040] Ingredients: parts by weight of each component are: 91.4 parts of asphalt; 3.5 parts of SBS; 0.1 part of sulfur powder; 5 parts of nano-calcium carbonate.

[0041] Production process: first raise the temperature of the asphalt to 175°C, start stirring, put SBS into the mixing tank, and stir for 240 minutes, then pass the material in the mixing tank through the colloid mill (the speed of the colloid mill is 1 to 3 minutes / ton), and grind all the materials until they swell After the tank, add sulfur powder and nano-calcium carbonate, and stir for 10 minutes to obtain modified asphalt.

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Abstract

The invention discloses SBS (styrene butadiene styrene) modified asphalt which comprises the following components in percentage by weight: 2.0 to 6.0 percent of star SBS, 0.08 to 0.2 percent of sulphur, and 2 to 10 percent of nano calcium carbonate. The invention also discloses a method for preparing the SBS modified asphalt. The SBS modified asphalt and the preparation method thereof are characterized in that the star SBS is taken as a modifier of the asphalt so as to improve the performance of the asphalt; meanwhile, the nano calcium carbonate and powdered sulfur are taken as stabilizers of the star SBS modifier so as to ensure the uniform dispersion of the modifier after being added in the asphalt, reduce the occurrence of segregation phenomenon, and improve the performance of the modified asphalt; and the nano calcium carbonate is used for diluting the powdered sulfur, and has the functions of improving the softening point of the modified asphalt and reducing the penetration degree of the modified asphalt.

Description

technical field [0001] The invention relates to the technical field of modified asphalt, in particular to SBS modified asphalt for roads, and a preparation method thereof. Background technique [0002] The modification of asphalt is a physical blending process. After the modifier polymer is added to the asphalt, it forms an elastic network structure in the asphalt through swelling and adsorption. This network structure has ideal elasticity, plasticity and extensibility, making the asphalt performance has been improved across the board. Styrene-butadiene-styrene block copolymer (SBS) has been used in asphalt modification for decades. From the structure of SBS, it can be divided into two types: linear type and star type. The performance improvement is obvious, but the processing is more difficult. [0003] US5371121 discloses a preparation method of SBS modified asphalt. It only adds a small amount of sulfur as a stabilizer. The process is simple, but the amount of SBS is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K3/06C08K3/26
Inventor 胡建国孙洪山
Owner QINGDAO ANBANG LUFA ASPHALT
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