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A kind of asphalt mixture and preparation method thereof

An asphalt mixture and asphalt technology are applied in the field of asphalt mixture with high shear resistance and its preparation to achieve the effects of improving shear resistance, reducing volatilization, and reducing cracks and rutting diseases

Active Publication Date: 2021-11-05
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Porous silicon is a new type of one-dimensional nanophotonic crystal material. The application research field of porous silicon has been expanded to biological and chemical sensors, photocatalysis, energy, supercapacitors, biological imaging, drug delivery and other fields. At present, porous silicon is used to improve The technology in permanent asphalt mixture has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of a kind of asphalt mixture with high shear performance of the present embodiment comprises the following steps:

[0024] 1) Add porous silicon to silane coupling agent KH-560, stir, wash and dry to obtain surface-modified activated porous silicon.

[0025] 2) Raise the temperature of SBS modified asphalt to 160-180°C, add the above-mentioned activated porous silicon, shear at a high speed for 30 minutes, and the shear rate is 5000r / min to obtain an asphalt mixture;

[0026] 3) Control the temperature at 160-180°C, add the aggregate to the asphalt mixture in step 2), and mix for 5 minutes; then add mineral powder, and mix for 90 seconds to obtain an asphalt mixture with high shear resistance; activate the porous The mass of silicon is 0.3wt% of the asphalt mixture, the asphalt mixture ratio (= SBS modified asphalt mass / (aggregate mass + mineral powder mass)) is 5.0%, and the mass of mineral powder is the total amount of asphalt mixture of 5wt%...

Embodiment 2

[0028] The preparation method of a kind of asphalt mixture with high shear performance of the present embodiment comprises the following steps:

[0029] 1) Add porous silicon to the surfactant, stir, wash, and dry to obtain surface-modified activated porous silicon.

[0030] 2) Raise the temperature of SBS modified asphalt to 160-180°C, add the above-mentioned activated porous silicon, shear at high speed for 45min, and shear at a speed of 4000r / min to obtain asphalt mixture;

[0031] 3) Control the temperature at 160-180°C, add aggregates to the asphalt mixture in step 2), and mix for about 5 minutes; then add mineral powder, and mix for 90 seconds to obtain an asphalt mixture with high shear resistance; among them, The mass of activated porous silicon is 0.4wt% of the asphalt mixture, the asphalt ratio of the asphalt mixture is 4.9%, and the mass of mineral powder is 5wt% of the total asphalt mixture.

Embodiment 3

[0033] The preparation method of a kind of asphalt mixture with high shear performance of the present embodiment comprises the following steps:

[0034] 1) Add porous silicon to the surfactant, stir, wash, and dry to obtain surface-modified activated porous silicon.

[0035] 2) Raise the temperature of SBS asphalt to 160-180°C, add the above-mentioned activated porous silicon, shear at high speed for 25 minutes, and the shear rate is 6000r / min to obtain asphalt mixture;

[0036] 3) Control the temperature at 160-180°C, add aggregates to the asphalt mixture in step 2), and mix for about 5 minutes; then add mineral powder, and mix for 90 seconds to obtain an asphalt mixture with high shear resistance; activate the porous The mass of silicon is 0.4% of the asphalt mixture, the asphalt mixture ratio is 5.2%, and the mass of mineral powder is 5wt% of the total asphalt mixture.

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PUM

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Abstract

The invention relates to an asphalt mixture and a preparation method thereof, comprising SBS modified asphalt, aggregate and porous silicon; wherein, the mass ratio of SBS modified asphalt to aggregate is 4.5-6:95-105, and porous silicon is mixed in the asphalt The content in the feed is 0.2‑0.5wt%. The asphalt mixture of the invention has high shear resistance and can reduce cracks and ruts on the asphalt pavement. The porous silicon in the present invention is a new type of one-dimensional nano-photonic crystal material, which has a "quantum sponge" microstructure with nano-silicon clusters as the skeleton, which can effectively adsorb light components in asphalt and make them agglomerate and precipitate , reduce the volatilization of light components, form a good network structure, improve the internal stiffness of asphalt, and effectively improve the shear performance of asphalt mixture.

Description

technical field [0001] The invention relates to an asphalt mixture and a preparation method thereof, in particular to an asphalt mixture with high shear resistance and a preparation method thereof. Background technique [0002] With the development of the transportation industry, heavy loads and overloads have increased sharply, and road cracks and rutting problems have emerged one after another, which puts forward higher requirements for the shear performance of asphalt pavement. In order to delay the occurrence of cracks, rutting and other diseases on the asphalt pavement, and prolong the service life of the asphalt pavement. Porous silicon is a new type of one-dimensional nanophotonic crystal material. The application research field of porous silicon has been expanded to biological and chemical sensors, photocatalysis, energy, supercapacitors, biological imaging, drug delivery and other fields. At present, porous silicon is used to improve The technology in permanent asp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B14/02C04B14/04
Inventor 谢军詹易群黄拓王一帆吴昱林
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY