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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 improved comprehensive performance, improved high and low temperature performance of asphalt, and simple preparation methods

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 domestic asphalts 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
  • Road asphalt and preparation method thereof
  • Road asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0041] Preparation of blended pitch (oxidized raw material)

[0042] Heat the first base asphalt and the second base asphalt to melt, then add a certain proportion of the second base asphalt to the first base asphalt, then raise the temperature to 155°C, and stir for 2 hours to obtain the blended asphalt. The results are shown in Table 3. Since the penetration at 25°C is relatively large, the penetration of the blended asphalt at 15°C is tested in Table 3.

[0043] Table 3 Main properties of base asphalt and blended asphalt

[0044]

[0045] Preparation of road asphalt

Embodiment 1

[0047] The blended pitch 2 is heated and melted, then added to a batch oxidation tank, and oxidized by passing in air. Oxidation temperature 230°C, oxidation air volume 0.13m 3 / (kg·h), the oxidation time is 240 minutes.

Embodiment 2

[0049] The blended pitch 3 is heated and melted, then added to a batch oxidation tank, and oxidized by passing in air. Oxidation temperature 240°C, oxidation air volume 0.14m 3 / (kg·h), the oxidation time is 180 minutes.

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Abstract

The invention discloses road asphalt. The road asphalt comprises the following components in percentage by mass: 65-90% of first matrix asphalt and 10-35% of second matrix asphalt, wherein the 15 DEGC penetration of the first matrix asphalt is 40-100 1 / 10mm, and the PI value of the second matrix asphalt is greater than 0.5. Meanwhile, the invention discloses a preparation method of the road asphalt. Various properties of the road asphalt can meet the technical index requirements of Kazakhstan road asphalt.

Description

technical field [0001] The invention relates to a road material, in particular to road asphalt with good low-temperature performance and a preparation method thereof. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C04B26/26C08J3/00
CPCC08L95/00C04B26/26C08J3/00C08L2205/025C08J2395/00C08J2495/00
Inventor 张建峰郭皎河刘树华吴晓颖
Owner CHINA PETROLEUM & CHEM CORP