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High-strength flame-retardant asphalt pavement material and preparation method thereof

An asphalt pavement, high-strength technology, used in building thermal insulation materials, building components, buildings, etc., can solve problems such as harming the health of construction workers, high cost of flame retardant asphalt, and poor flame retardant effect.

Inactive Publication Date: 2021-10-29
梁培
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, asphalt flame retardants are mainly halogen flame retardants and inorganic hydroxide flame retardants. Halogen flame retardants have a better flame retardant effect on asphalt, but they will produce a large amount of toxic when the flame retardant asphalt mixture is constructed and the asphalt pavement is burned. , corrosive gas and smoke, which seriously endanger the health of construction workers, and lead to suffocation and death of trapped people in the event of a fire. However, the large amount of inorganic hydroxide flame retardants leads to high cost of flame retardant asphalt, and the cost of inorganic flame retardants The flame retardant effect is poor, and the compatibility and bonding between it and the asphalt matrix are poor. In the later use, the material and the matrix will be separated, and it is easy to crack, which will affect the mechanical strength of the asphalt pavement and affect the asphalt mixture. adversely affect performance

Method used

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  • High-strength flame-retardant asphalt pavement material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0041] (1) Weigh the medical stone and put it into a pulverizer to crush for 1 hour to obtain the crushed medical stone, and then mix the crushed medical stone and citric acid solution with a concentration of 0.5mol / L at a mass ratio of 1:10 Put it into an ultrasonic oscillator, and react with ultrasonic oscillation at a frequency of 40kHz for 5 minutes. After the ultrasonic oscillation is completed, filter and separate to obtain the filter residue;

[0042] (2) Put the above-mentioned filter residue into liquid nitrogen, immerse and freeze for 5 minutes, heat and thaw, continue to impregnate with citric acid solution with ultrasonic vibration, and cycle through immersion, freezing, and thawing for 3 times, then put it into a pulverizer again to obtain pretreatment medical stone crushed;

[0043] (3) Mix the polyvinyl alcohol solution with a mass fraction of 25% and the 3,4-dihydroxybenzoic acid solution with a mass fraction of 30% 3:1, put it into a reaction kettle, heat up t...

example 2

[0048] (1) Weigh the medical stone and put it into a pulverizer for 2 hours to get the crushed medical stone, and then mix the crushed medical stone and citric acid solution with a concentration of 0.5mol / L at a mass ratio of 1:10 Put it into an ultrasonic oscillator, and react with ultrasonic oscillation at a frequency of 45kHz for 8 minutes. After the ultrasonic oscillation is completed, filter and separate to obtain the filter residue;

[0049] (2) Put the above-mentioned filter residue into liquid nitrogen, immerse and freeze for 8 minutes, then heat and thaw, continue to impregnate with citric acid solution with ultrasonic vibration, so that 4 times of immersion, freezing, and thawing cycle treatment, then put it into a pulverizer again to pulverize to obtain pretreatment medical stone crushed;

[0050](3) Mix the polyvinyl alcohol solution with a mass fraction of 25% and the 3,4-dihydroxybenzoic acid solution with a mass fraction of 30% in a ratio of 3:1, put it into a r...

example 3

[0055] (1) Weigh the medical stone and put it into a pulverizer for 2 hours to get the crushed medical stone, and then mix the crushed medical stone and citric acid solution with a concentration of 0.5mol / L at a mass ratio of 1:10 Put it into an ultrasonic oscillator, and react with ultrasonic oscillation at a frequency of 50kHz for 10 minutes. After the ultrasonic oscillation is completed, filter and separate to obtain the filter residue;

[0056] (2) Put the above-mentioned filter residue into liquid nitrogen, immerse and freeze for 10 minutes, heat and thaw, continue to impregnate with citric acid solution by ultrasonic vibration, so that 5 times of immersion, freezing, and thawing cycles, and then put it into a pulverizer again to obtain pretreatment medical stone crushed;

[0057] (3) Mix the polyvinyl alcohol solution with a mass fraction of 25% and the 3,4-dihydroxybenzoic acid solution with a mass fraction of 30% in a ratio of 3:1, put it into a reactor, heat up to 80°...

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Abstract

The invention relates to a high-strength flame-retardant asphalt pavement material and a preparation method thereof, and belongs to the technical field of building material preparation. The preparation method comprises the following steps: by taking medical stone as a raw material, firstly slightly corroding the medical stone with an acid solution, then freezing and crushing the medical stone with liquid nitrogen, then carrying out surface chelating modification on the crushed material, depositing nano-scale aluminum hydroxide, and finally modifying the crushed material with organic phosphonic acid to prepare a self-made asphalt auxiliary agent, and doping the self-made asphalt auxiliary agent into matrix asphalt to finally prepare the high-strength flame-retardant asphalt pavement material. The prepared high-strength flame-retardant asphalt pavement material is high in mechanical strength and excellent in flame retardance, and has a wide application prospect.

Description

technical field [0001] The invention relates to a high-strength flame-retardant asphalt paving material and a preparation method thereof, belonging to the technical field of building material preparation. Background technique [0002] At present, asphalt pavement has been widely used in highway tunnels due to its excellent road performance and good driving comfort. However, asphalt is flammable. The damage will lead to a long-term interruption of traffic and will cause a large number of casualties. In order to improve the fire performance of tunnel asphalt pavement, the preparation and application of flame-retardant asphalt and its concrete have been highly valued at home and abroad. Adding flame retardant is an important method to improve the flame retardancy of asphalt. At present, asphalt flame retardants are mainly halogen flame retardants and inorganic hydroxide flame retardants. Halogen flame retardants have a better flame retardant effect on asphalt, but they will p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K13/06C08K9/04C08K7/26C08K3/22C08K5/5313C08K5/134C08K5/101C08K5/11
CPCC08K13/06C08K9/08C08K7/26C08K3/22C08K5/5313C08K5/1345C08K5/101C08K5/11C08K2003/2227C08L2201/02C08L95/00
Inventor 梁培
Owner 梁培