Modified asphalt and preparation method thereof

Abstract

The invention relates to modified asphalt and a preparation method thereof. The modified asphalt is prepared from components in parts by weight as follows: 10-20 parts of polycarbosilane, 5-10 parts of a silane coupling agent and 90-100 parts of asphalt. Polycarbosilane and the silane coupling agent can be dissolved with asphalt very well, a stable homogeneous system is formed without segregationand layering, and storage and transportation are convenient; a polycarbosilane precursor has a higher softening point and good heat stability and rheological property and can improve temperature stability of the modified asphalt; polycarbosilane has thermosetting performance and can be further subjected to a crosslinking reaction with increase of the temperature, and a three-dimensional net structure is formed, so that the modified asphalt has higher viscosity and aging resistance.

Description

technical field

[0001] The invention relates to a modified asphalt and a preparation method thereof, in particular to a polycarbosilane modified asphalt and a preparation method thereof. Background technique

[0002] In the past ten years, my country's highway construction has achieved rapid development. As of the end of 2017, the total mileage of national highways reached 4.7735 million kilometers, ranking first in the world. Compared with cement pavement, asphalt pavement has been widely used due to its smooth surface, no joints, comfortable driving, low vibration, low noise, wear resistance, no dust and easy cleaning, short construction period, and easy maintenance and repair. . With the development of our country's economy, the road traffic volume is increasing year by year, and the axle load of vehicles is getting heavier and heavier. The performance requirements of road asphalt are also getting higher and higher. The existing base asphalt has been difficult to meet th...

Examples

Embodiment 1

[0029] In the present embodiment, the preparation method of modified asphalt is as follows:

[0030] 1) In parts by weight, weigh 100 parts of petroleum-based asphalt, 15 parts of polycarbosilane powder (softening point 90°C, mesh number 4), and 8 parts of KH792 silane coupling agent, and set aside;

[0031] 2) Heat the petroleum base asphalt to 160°C, keep it warm under slow stirring (40r / min) and wait for the next process;

[0032] 3) Add the weighed polycarbosilane powder to the petroleum base asphalt, first stir at a slow speed (40r / min) for 7 minutes, then stir at a medium speed (80r / min) for about 6 minutes until the polycarbosilane powder is evenly dispersed, and obtain mixture A , and wait for the next process under slow stirring (40r / min) state;

[0033] 4) Add the weighed KH792 silane coupling agent into the mixture A, stir at a slow speed for 7 minutes, then stir at a medium speed (80r / min) for about 6 minutes until the silane coupling agent is uniformly dispersed;...

technical field

[0001] The invention relates to a modified asphalt and a preparation method thereof, in particular to a polycarbosilane modified asphalt and a preparation method thereof. Background technique

[0002] In the past ten years, my country's highway construction has achieved rapid development. As of the end of 2017, the total mileage of national highways reached 4.7735 million kilometers, ranking first in the world. Compared with cement pavement, asphalt pavement has been widely used due to its smooth surface, no joints, comfortable driving, low vibration, low noise, wear resistance, no dust and easy cleaning, short construction period, and easy maintenance and repair. . With the development of our country's economy, the road traffic volume is increasing year by year, and the axle load of vehicles is getting heavier and heavier. The performance requirements of road asphalt are also getting higher and higher. The existing base asphalt has been difficult to meet th...

Examples

Embodiment 1

[0029] In the present embodiment, the preparation method of modified asphalt is as follows:

[0030] 1) In parts by weight, weigh 100 parts of petroleum-based asphalt, 15 parts of polycarbosilane powder (softening point 90°C, mesh number 4), and 8 parts of KH792 silane coupling agent, and set aside;

[0031] 2) Heat the petroleum base asphalt to 160°C, keep it warm under slow stirring (40r / min) and wait for the next process;

[0032] 3) Add the weighed polycarbosilane powder to the petroleum base asphalt, first stir at a slow speed (40r / min) for 7 minutes, then stir at a medium speed (80r / min) for about 6 minutes until the polycarbosilane powder is evenly dispersed, and obtain mixture A , and wait for the next process under slow stirring (40r / min) state;

[0033] 4) Add the weighed KH792 silane coupling agent into the mixture A, stir at a slow speed for 7 minutes, then stir at a medium speed (80r / min) for about 6 minutes until the silane coupling agent is uniformly dispersed;...

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