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Road asphalt and preparation method thereof

A technology of road asphalt and matrix asphalt, which is applied to building components, building insulation materials, buildings, etc., to achieve the effects of reducing pollution, improving comprehensive performance, and improving high and low temperature performance

Active Publication Date: 2021-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Referring to the Kazakhstan road asphalt test method, the 0°C penetration, 0°C elongation, and brittle point of some asphalts in China were tested, and the results showed a large gap compared with similar grades of road asphalt in Kazakhstan and other countries

Method used

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  • Road asphalt and preparation method thereof
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Effect test

preparation example Construction

[0052] Preparation of Oxidation Feedstock

[0053] After heating and melting the blended asphalt, add an appropriate amount of waste lubricating oil concentrate, raise the temperature to 145°C, and stir for 1 hour to obtain the oxidized raw material. Among them, the saturated content of the waste lubricating oil concentrate 1: 93%, aromatic content: 1%, colloid: 3%, asphaltenes: 3%. Saturated content in waste lubricating oil concentrate 2: 91%, aromatic content: 1.5%, gum: 3.5%, asphaltenes: 4%. Saturated content in waste lubricating oil concentrate 3: 94%, aromatic content: 1%, gum: 3%, asphaltenes: 2%. Due to the high penetration at 25°C, the penetration and softening point of the oxidized raw material at 15°C were tested, and the results are shown in Table 4.

[0054] Table 4 Oxidation Raw Material Ratio and Main Properties

[0055] project Oxidation raw material 1 Oxidation raw material 2 Oxidation raw material 3 Oxidation raw material 4 Oxidation ra...

Embodiment 1

[0061] The oxidizing raw material 1 is heated and melted, then added to a batch-type oxidizing kettle, and oxidized by passing in air. Oxidation temperature 240°C, oxidation air volume 0.13m 3 / (kg·h), the oxidation time is 240 minutes.

Embodiment 2

[0063] The oxidizing raw material 2 is heated and melted, then added to a batch-type oxidizing kettle, and oxidized by passing in air. Oxidation temperature 248°C, oxidation air volume 0.16m 3 / (kg·h), the oxidation time is 280 minutes.

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Abstract

The invention provides road asphalt and a preparation method thereof. The road asphalt comprises the following components in percentage by mass: 70-95% of blended asphalt, and 5%-30% of a waste lubricating oil concentrated solution. The preparation method comprises the following steps: mixing first matrix asphalt and second matrix asphalt to obtain the blended asphalt; adding the waste lubricatingoil concentrated solution into the obtained blended asphalt, and adding obtained mixture into an intermittent oxidation kettle for oxidation. and after the oxidation is finished, removing residual oxygen in the asphalt to obtain the modified road asphalt. The road asphalt prepared by the preparation method disclosed by the invention not only can meet the technical index requirements of Kazakhstanroad asphalt, but also has more excellent low-temperature performance.

Description

technical field [0001] The invention relates to a road material, in particular to road asphalt with good low-temperature performance and its preparation. Background technique [0002] Low-temperature cracking of asphalt pavement is a major form of pavement damage. In a low-temperature environment, cracking of asphalt binder is the direct cause of pavement damage. Therefore, whether the asphalt binder has good low-temperature performance is an important factor for maintaining the function of the pavement. condition. Current low temperature test methods and evaluation indicators: Fraser brittle point, temperature sensitivity index, stiffness nomogram, SHRP test method, glass transition temperature, low temperature ductility and force ductility, low temperature viscosity, etc. Degree, Fraser brittle point, low temperature penetration, SHRP test methods are used relatively more. [0003] The US FHWA proposed to the Department of Transportation in 1988 that the low-temperature ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L91/00
CPCC08L95/00C08L2205/025C08L91/00
Inventor 张建峰郭皎河刘树华吴晓颖
Owner CHINA PETROLEUM & CHEM CORP