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Hydroxylated SBS/graphene composite modified asphalt and preparation method thereof

A graphene composite and modified asphalt technology, which is applied in building components, building insulation materials, buildings, etc., can solve the problems affecting the quality and normal use of asphalt, the deterioration of asphalt performance, and the reduction of low-temperature ductility, etc., to achieve good storage stability High stability, high ductility, and improved stability

Inactive Publication Date: 2021-05-04
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SBS is a high polymer, and it is a non-polar polymer. It has poor compatibility with polar matrix asphalt, which leads to phase separation of modified asphalt during high temperature storage and transportation, resulting in poor performance of asphalt. , lower ductility at low temperature, easy to crack, high temperature sensitivity, and then affect the quality and normal use of asphalt

Method used

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  • Hydroxylated SBS/graphene composite modified asphalt and preparation method thereof
  • Hydroxylated SBS/graphene composite modified asphalt and preparation method thereof
  • Hydroxylated SBS/graphene composite modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Ingredients: The mass percentages of each component are: base asphalt 94.4%, SBS-OH 4.3%; graphene 0.1%, furfural oil 1%, BHS-2A 0.2%; the base asphalt is 70# base asphalt; linear SBS -OH has an average molecular weight of 100,000.

[0070] Take 70# base asphalt and heat it to 185±5°C to melt; then add furfural to extract oil and SBS-OH, stir and premix at 200r / min for 1h, and shear at 175±5°C for 25min at high speed, with a shear rate of 2500r / min ; Add graphene, shear for 20 minutes, and the shear rate is 2500r / min; after adding the stabilizer (BHS-2A), continue high-speed shearing for 10 minutes, and then develop at 175±5°C for 4.5 hours at a stirring rate of 100r / min. The modified asphalt was obtained (see Table 4 for properties).

Embodiment 2

[0078] Ingredients: The mass percentages of each component are: base asphalt 94.3%, SBS-OH 4.3%; graphene 0.2%, furfural oil 1%, BHS-2A 0.2%; the base asphalt is 70# base asphalt; linear SBS -OH has an average molecular weight of 100,000.

[0079] Take 70# base asphalt and heat it to 185±5°C to melt; then add furfural to extract oil and SBS-OH, stir and premix at 200r / min for 1h, and shear at 175±5°C for 25min at high speed, with a shear rate of 2500r / min ; Add graphene, shear for 20 minutes, and the shear rate is 2500r / min; after adding the stabilizer (BHS-2A), continue high-speed shearing for 10 minutes, and then develop at 175±5°C for 4.5 hours at a stirring rate of 100r / min. The modified asphalt was obtained (see Table 4 for properties).

Embodiment 3

[0081] Ingredients: The mass percentages of each component are: base asphalt 94.2%, SBS-OH 4.3%; graphene 0.3%, furfural oil 1%, BHS-2A 0.2%; the base asphalt is 70# base asphalt; linear SBS -OH has an average molecular weight of 100,000.

[0082] Take 70# base asphalt, heat it to 185±5℃ to melt; then add furfural extract oil and SBS-OH, stir and premix at 200r / min for 1h, and shear at 175±5℃ for 25min at a high speed, with a shear rate of 2500r / min min; add graphene, shear 20min, shear rate 2500r / min; add stabilizer (BHS-2A), continue high-speed shearing for 10min, then develop at 175±5°C, stirring rate 100r / min for 4.5h , to obtain modified asphalt (properties are shown in Table 4).

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Abstract

The invention discloses hydroxy-terminated SBS / graphene composite modified asphalt and a preparation method thereof, linear hydroxy-terminated SBS(SBS-OH) is used as a modifier to modify asphalt, the SBS-OH has certain polarity, improves the compatibility with matrix asphalt, fully embodies the performance of SBS, improves the low-temperature ductility and fatigue resistance of the modified asphalt, and meanwhile, the graphene has high strength, and the high-temperature performance of the modified asphalt can be improved.

Description

technical field [0001] The invention relates to the field of asphalt, in particular to a hydroxyl-terminated SBS / graphene composite modified asphalt and a preparation method thereof. Background technique [0002] Modern highway traffic has heavy axle loads, large flow rates, and high tire pressure, which puts higher demands on the quality of the road surface. It is difficult for ordinary asphalt to meet the increasingly harsh environmental and technical requirements. This is due to the insurmountable characteristics of ordinary asphalt, such as low-temperature brittleness, high temperature sensitivity, and high-temperature flow, which cannot meet the requirements of high-speed highways. Therefore, people hope to improve or enhance the performance of some aspects of asphalt by adding some other substances. Polymer modified asphalt is the most widely used. Among them, styrene-butadiene-styrene block copolymer (SBS) has both properties of rubber and plastic due to its unique s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K3/04
CPCC08L95/00C08L53/025C08K3/042
Inventor 李静静邵磊山
Owner CHINA PETROLEUM & CHEM CORP
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