A kind of high-performance modified asphalt and its preparation method

A modified asphalt, high-performance technology, applied in building components, building insulation materials, buildings, etc., can solve problems affecting road transportation efficiency and driving safety, deterioration of SBS modified asphalt performance, and SBS polymer chain breakage and degradation. , to achieve excellent thermal stability, reduce chain scission, and promote adsorption.

Active Publication Date: 2021-12-17
CHANGAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, asphalt aging during construction heating and service often leads to a large number of early diseases in the service process of asphalt pavement, such as looseness, spalling, potholes, cracks and subsidence, etc., which seriously affects the transportation efficiency and driving of road traffic. Safety, but also greatly affects the service life of the pavement, increasing maintenance and repair costs
For example, for the most widely used SBS modified asphalt, when it is directly exposed to sunlight, the ultraviolet rays in the sun will not only cause oxidative aging of the asphalt, but also cause chain scission degradation of the SBS polymer, resulting in Performance degradation of SBS modified asphalt, early disease of asphalt pavement
Although some scholars at home and abroad have also tried to carry out research on asphalt anti-aging prevention measures, such as adding anti-aging agents, antioxidants, organic montmorillonite, etc. to asphalt, but it will increase the process and cost, and will affect other aspects. road performance

Method used

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  • A kind of high-performance modified asphalt and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This example provides a high-performance modified asphalt, which is made of the following raw materials: 84% of base asphalt, 14% of carbon aerogel, and 2% of compatibilizer.

[0029] The preparation process of the carbon airgel is as follows: 5 parts of hydroquinone are dissolved in 20 parts of water, then 0.5 parts of potassium chloride and 0.2 parts of sodium carbide are added, after stirring evenly, 7 parts of furfuraldehyde are added to obtain a white viscous The thick solution was then placed in a water bath at 65° C. for 10 h, and the reaction solution gradually turned black to generate a hydrogel microsphere solution. The solution was repeatedly washed with deionized water until the pH value no longer changed, and then filtered to obtain a solid powder, which was placed in a carbonization furnace and carbonized for 4 hours at 1000°C to obtain a carbon aerogel.

[0030] Described compatibilizer is maleic anhydride grafted ethylene-octene random copolymer and poly...

Embodiment 2

[0034] This example provides a high-performance modified asphalt, which is made of the following raw materials: 93% of base asphalt, 6% of carbon aerogel, and 1% of compatibilizer.

[0035] The carbon airgel preparation process is the same as in Example 1.

[0036] The compatibilizer is composed of maleic anhydride grafted ethylene-octene random copolymer and maleic anhydride grafted polyethylene according to a weight ratio of 1:1.

[0037] The preparation method of the high-performance modified asphalt of this example is the same as that of Example 1.

[0038] See Table 1 for the performance test results of the high-performance modified asphalt in this example.

Embodiment 3

[0040] This example provides a high-performance modified asphalt, which is made of the following raw materials: 90% of base asphalt, 7% of carbon aerogel, and 3% of compatibilizer.

[0041] The carbon airgel preparation process is the same as in Example 1.

[0042] Described compatibilizer is composed of polybutylene terephthalate and maleic anhydride grafted polyethylene according to a weight ratio of 1:1.

[0043] The preparation method of the high-performance modified asphalt of this example is the same as that of Example 1.

[0044] See Table 1 for the performance test results of the high-performance modified asphalt in this example.

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Abstract

The invention provides a high-performance modified asphalt and a preparation method thereof. It is made of the following raw materials in parts by weight: 84% to 93% of matrix asphalt, 6% to 14% of carbon airgel, and The additive is 1% to 3%, and the sum of the parts by weight of the raw materials is 100%. The high-performance modified asphalt of the present invention has both excellent anti-aging performance and temperature-sensitive performance, which plays an important role in promoting the sustainable development of road engineering, and is especially suitable for the construction of asphalt pavement in western my country and high-altitude areas . The preparation process of the invention greatly reduces the heating temperature and swelling development time in the traditional modified asphalt preparation process, reduces resource consumption and has a simple preparation method.

Description

technical field [0001] The invention relates to the technical field of road engineering, relates to modified asphalt, in particular to a high-performance modified asphalt and a preparation method thereof. Background technique [0002] Asphalt pavement has developed into the most important pavement structure in my country due to its high driving comfort, convenient maintenance and fast traffic speed. However, engineering practice in recent years shows that modified asphalt still faces many problems that need to be solved. On the one hand, asphalt aging during construction heating and service often leads to a large number of early diseases in the service process of asphalt pavement, such as looseness, spalling, potholes, cracks and subsidence, etc., which seriously affects the transportation efficiency and driving of road traffic. Safety has also greatly affected the service life of the pavement and increased maintenance and repair costs. For example, for the most widely use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L67/02C08L51/06C08K7/24
CPCC08L95/00C08L2205/03C08L2205/025C08L2201/08C08K2201/003C08L67/02C08L51/06C08K7/24
Inventor 何锐郑睢宁郭凤俊刘斌清杨博李媛薛成段德峰白永厚
Owner CHANGAN UNIV
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