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Asphalt composition and preparation method thereof

A kind of asphalt composition, composition technology, applied in the direction of building structure, building components, building insulation materials, etc., to achieve the effect of high viscosity, excellent high elasticity, and low production cost

Active Publication Date: 2017-06-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, with the improvement of pavement grade, the high and low temperature performance and viscoelasticity of the existing high viscoelastic asphalt materials need to be further improved

Method used

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  • Asphalt composition and preparation method thereof
  • Asphalt composition and preparation method thereof
  • Asphalt composition and preparation method thereof

Examples

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preparation example Construction

[0040] The present invention also provides the preparation method of above-mentioned asphalt composition, and this method comprises the following steps:

[0041] (1) After heating the base asphalt, it is blended with aromatic oil, styrene-butadiene-styrene block copolymer and sulfide stabilizer to obtain a modified styrene-butadiene-styrene block copolymer asphalt;

[0042] (2) Blending the styrene-butadiene-styrene block copolymer modified asphalt obtained in step (1) with rubber powder under heating conditions.

[0043] According to the present invention, in step (1), the heating conditions may include: the heating temperature is 160-220° C., and the heating time is 10-30 minutes. Heating too fast or too slow will affect the compatibility between the components. Therefore, in order to make the base asphalt in a molten state, it is better compatible with the polymer modifier. Preferably, the heating temperature is 175- 195°C, the heating time is 15-25min.

[0044] Accordin...

Embodiment 1

[0052] This example is used to illustrate the asphalt composition provided by the present invention and its preparation method.

[0053] The composition formula (by weight) of asphalt composition:

[0054]

[0055] Among them, the base asphalt is 70A road petroleum asphalt commercially purchased from Sinopec Zhenhai Refining and Chemical Company, with a penetration (25°C, 100g, 5s) of 71;

[0056] Styrene-butadiene-styrene block copolymer (SBS) is a styrene-butadiene-styrene block copolymer commercially available from SBS-791H from Sinopec Yueyang Petrochemical Company, with an average molecular weight of 200,000, wherein, based on the total amount of styrene-butadiene-styrene block copolymer, the content of structural units formed from styrene is 30% by weight, and the content of structural units formed from butadiene is 70% by weight;

[0057] The aromatic hydrocarbon content in the aromatic hydrocarbon oil is 75% by weight (commercially purchased from Jinan Heavy Oil C...

Embodiment 2

[0073] This example is used to illustrate the asphalt composition provided by the present invention and its preparation method.

[0074] The composition formula (by weight) of asphalt composition:

[0075]

[0076] Among them, the base asphalt is 70A road petroleum asphalt commercially purchased from Sinopec Zhenhai Refining and Chemical Company, with a penetration (25°C, 100g, 5s) of 71;

[0077]Styrene-butadiene-styrene block copolymers are styrene-butadiene-styrene block copolymers commercially available from Sinopec Yueyang Petrochemical Company under the brand name SBS-791H, with an average molecular weight of 200,000. Wherein, based on the total amount of styrene-butadiene-styrene block copolymer, the content of the structural unit formed by styrene is 30% by weight, and the content of the structural unit formed by butadiene is 70% by weight ;

[0078] The aromatic hydrocarbon content in the aromatic hydrocarbon oil is 85% by weight (commercially purchased from Jina...

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Abstract

The invention discloses an asphalt composition and a preparation method thereof. The asphalt composition is prepared from styrene-butadiene-styrene segmented copolymer modified asphalt and rubber powder, wherein the styrene-butadiene-styrene segmented copolymer modified asphalt and rubber powder is prepared by modifying matrix asphalt with styrene-butadiene-styrene segmented copolymer, sulfide stabilizer and aromatic oil; and the asphalt composition is prepared from the following components based on 100 weight parts of matrix asphalt: 3-10 parts of styrene-butadiene-styrene segmented copolymer, 2-12 parts of aromatic oil, 0.3-1 part of sulfide stabilizer and 5-25 parts of rubber powder. The asphalt composition has a dynamic viscosity of 30000-100000Pa.S at 60 DEG C and an elastic recovery of more than 90 percent at 25 DEG C, and is 82-28 according to AASHTO M320 detected PG gradation. The asphalt composition has excellent high elasticity, high viscosity and excellent low-temperature performance.

Description

technical field [0001] The invention relates to an asphalt composition and a preparation method thereof. Background technique [0002] my country's urban infrastructure construction has shown a momentum of rapid growth in recent years. More and more long-span cable-stayed bridges and steel box girder bridges have appeared in the engineering field because of their high toughness, easy bending, fast heat transfer and stiffening at the bottom of the bridge deck. There are many longitudinal and horizontal ribs and are easy to corrode, which makes the use conditions of steel bridge deck pavement much harsher than that of general expressway and airport pavement. Anti-deformation ability and good interlayer bonding force. [0003] High-viscoelastic asphalt materials are widely used in stress-absorbing layers and bridge deck pavement materials because of their good high-temperature and low-temperature performance, anti-rutting ability and low-temperature cracking ability, softening p...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L21/00C08L53/02C08L91/00C08L81/04C08K3/22C08K3/06
CPCC08L95/00C08L2201/08C08L2205/035C08L2207/24C08L21/00C08L53/02C08L91/00C08L81/04C08K2003/2296C08K3/06
Inventor 裴玉同沈家永黄婉利罗望群所怡董德安高冰梅
Owner CHINA PETROLEUM & CHEM CORP
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