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A kind of chemically modified hard asphalt and its preparation method

A kind of hard asphalt, chemical modification technology, applied in the field of petroleum asphalt, can solve the problem of not taking into account the low temperature service performance of asphalt, high reaction temperature, long reaction time, etc., to achieve excellent flow resistance, good adhesion performance, excellent low temperature The effect of using performance

Active Publication Date: 2017-01-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has high reaction temperature, long reaction time, high energy consumption, and only improves the high-temperature performance of asphalt, but cannot take into account the low-temperature performance of asphalt

Method used

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  • A kind of chemically modified hard asphalt and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Select asphalt with a needle penetration of 56 1 / 10mm and a softening point of 52.3°C as the base asphalt, heat it to 145°C until it melts and flows, take 100 parts of the base asphalt and send it into the reaction tank, and start the agitator to lower the temperature of the reaction tank Maintain at 155°C, add 0.8 parts of polyphosphoric acid into the reaction tank, react for 80 minutes at a stirring speed of 1000 rpm, then add 4 parts of mother liquor of extension agent, continue high-speed stirring for 60 minutes, and finally add 0.2 parts The N-tallow-1,3-propylene diamine was stirred and reacted for 15 minutes to obtain the chemically modified high-strength hard pitch of the present invention. The properties of the product are shown in Table 1.

Embodiment 2

[0024] Prepare chemically modified hard asphalt according to the process of Example 1, the difference is that the addition of polyphosphoric acid is 1.2 parts, the addition of extension agent is 5.0 parts, and the addition of N-tetradecyl-1,3 propylene diamine The amount added is 0.3 parts. The properties of its products are shown in Table 1.

Embodiment 3

[0026] Prepare chemically modified hard asphalt according to the process of Example 1, the difference is that the addition of polyphosphoric acid is 1.5 parts, the addition of extension agent is 6.0 parts, and the addition of N-tallow-1,3-propylenediamine 0.3 parts. The properties of its products are shown in Table 1.

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Abstract

The invention discloses chemically-modified hard asphalt and a preparation method thereof. The chemically-modified hard asphalt comprises the following components in parts by weight: 100 parts of basic asphalt, 0.5-3.0 parts of polyphosphoric acid, 2-12 parts of ductility increasing agent mother liquor and 0.2-0.4 part of a surfactant. The preparation method comprises the following steps: adding polyphosphoric acid into the melted basic asphalt for chemically-modified reaction, then adding the ductility increasing agent mother liquor for further reaction, and finally adding the surfactant for further reaction for a period of time to prepare the chemically-modified hard asphalt. The whole process is implemented under a high-speed stirring condition. The chemically-modified hard asphalt prepared by the preparation method disclosed by the invention is high in flow resistance, high in softening point, high in low-temperature ductility, high in bonding property with aggregate, and excellent in high temperature stability, low temperature cracking resistance, fatigue resistance and water invasion resistance; the chemically-modified hard asphalt is particularly suitable for areas with high temperature, wet areas and areas with large diurnal temperature difference and can be used for paving a pavement of a traffic road, so that common pavement damage phenomena such pavement rutting, upheaval, fatigue cracking, low-temperature cracking and water invasion of the pavement are effectively prevented, and the service life of the pavement is prolonged.

Description

technical field [0001] The invention belongs to the field of petroleum asphalt, in particular to a chemically modified hard asphalt and a preparation method, in particular to a hard asphalt with excellent high and low temperature service performance. Background technique [0002] The climate anomaly caused by the continuous development of the global greenhouse effect has made the use environment of asphalt pavement worse. With the increase of road traffic volume and heavy-duty vehicles, the permanent deformation and plastic flow deformation damage of asphalt pavement caused by the joint action of high temperature and wheel rolling are becoming more and more serious. The main disease of the road surface. A large number of research and application practices have shown that hard asphalt with high softening point and low penetration and good flow resistance is used as a binder to pave the road surface, which can effectively alleviate the flow deformation diseases such as ruttin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L9/06C08K3/32C08K5/17
Inventor 陈杰宣根海徐青柏石君章万淼
Owner CHINA PETROLEUM & CHEM CORP
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