Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of modified polyurethane emulsified asphalt concrete and its preparation method and application

A technology of emulsified asphalt and polyurethane, applied in the field of road engineering, can solve the problem of unable to control the strength formation time of emulsified asphalt mixture, and achieve the effect of shortening the time of blocking traffic, promoting demulsification and rapid strength formation.

Inactive Publication Date: 2019-09-06
GUANGDONG UNIV OF TECH
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention discloses a modified polyurethane emulsified asphalt concrete and its preparation method and application, which are used to solve the problem that the polyurethane modified emulsified asphalt cannot absorb the water in the emulsified asphalt in the prior art, and promote the demulsification of the emulsified asphalt, and The disadvantage of not being able to control the strength development time of the emulsified asphalt mixture

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of modified polyurethane emulsified asphalt concrete and its preparation method and application
  • A kind of modified polyurethane emulsified asphalt concrete and its preparation method and application
  • A kind of modified polyurethane emulsified asphalt concrete and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Preparation of polyurethane prepolymer: weigh 100g of toluene diisocyanate, 57g of N-204 polyether and 5g of acetone, pour the toluene diisocyanate into an enamel bucket, add N-204 polyether, stir well, react at 50°C for 2.5 hours, cool To normal temperature, add acetone to dilute to obtain polyurethane prepolymer;

[0056] Prepare polyurethane slurry: 100g polyurethane prepolymer, 5g acetone (solvent), 1g triethylamine (catalyst), 1g polysiloxane diisobutyl ketone (defoamer), 0.8g water-soluble silicone oil (surfactant ) and 20g dibutyl phthalate (plasticizer) are mixed, stirred evenly, and the resulting product is a polyurethane slurry, sealed and preserved;

[0057] Preparation of modified emulsified asphalt: mix 100 parts of emulsified asphalt and 1 part of polyurethane slurry, and stir for 20 seconds to obtain modified emulsified asphalt;

[0058] Preparation of modified polyurethane emulsified asphalt concrete: Mix 100 parts of aggregate and 1 part of water for 1...

Embodiment 2

[0060] Preparation of polyurethane prepolymer: Weigh 100g polyphenyl polyisocyanate, 18g N-303 polyether, 72g N-303 polyether and 8g acetone, pour polyphenyl polyisocyanate into an enamel bucket, add N-204 polyether Mix with N-303 polyether, stir evenly, react at 60°C for 3 hours, cool to room temperature, add acetone to dilute to obtain polyurethane prepolymer;

[0061] Prepare polyurethane slurry: 100g polyurethane prepolymer, 15g toluene (solvent), 0.2g polysiloxane diisobutyl ketone (defoamer), 0.5g water-soluble silicone oil (surfactant) and 10g phthalic acid Dibutyl ester (plasticizer) mixes, and stirs evenly, and the gained product is polyurethane slurry, and sealed preservation;

[0062] Preparation of modified emulsified asphalt: Mix 100 parts of emulsified asphalt and 15 parts of polyurethane slurry, and stir for 30 seconds to obtain modified emulsified asphalt;

[0063] Preparation of modified polyurethane emulsified asphalt concrete: Immediately mix 11 parts of mo...

Embodiment 3

[0065] Preparation of polyurethane prepolymer: Weigh 100g diphenylmethane diisocyanate, 29g propylene oxide polyether and 3g acetone, pour diphenylmethane diisocyanate into an enamel bucket, add propylene oxide polyether, stir evenly, 55 ℃ for 2.5 hours, cooled to room temperature, and diluted with acetone to obtain a polyurethane prepolymer;

[0066] Prepare polyurethane slurry: 100g polyurethane prepolymer, 5g acetone (solvent), 1.5g triethylamine (catalyst), 0.8g polysiloxane diisobutyl ketone (defoamer), 1g water-soluble silicone oil (surface active agent) mixed with 25g dibutyl phthalate (plasticizer), stirred evenly, and the resulting product is a polyurethane slurry, sealed and preserved;

[0067] Preparation of modified emulsified asphalt: Mix 100 parts of emulsified asphalt and 8 parts of polyurethane slurry, and stir for 25 seconds to obtain modified emulsified asphalt;

[0068] Preparation of modified polyurethane emulsified asphalt concrete: Mix 100 parts of aggre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of road engineering, and discloses modified polyurethane emulsified asphalt concrete as well as a preparation method and application thereof. The invention discloses polyurethane slurry and application thereof. The invention also discloses the modified polyurethane emulsified asphalt concrete, which is prepared from the following components in parts by weight: 100 parts of aggregate, 8 to 11 parts of modified emulsified asphalt and 0 to 4 parts of water, wherein the modified emulsified asphalt is prepared from the following components in parts by weight: 100 parts of emulsified asphalt and 1 to 15 parts of the polyurethane slurry. The invention also discloses the preparation method of the modified polyurethane emulsified asphalt concrete, and application of the modified polyurethane emulsified asphalt concrete to the patching of a pit slot in a pavement and the patching of a crack in the pavement. The polyurethane slurry in the modified polyurethane emulsified asphalt concrete disclosed by the invention can absorb moisture in the emulsified asphalt to promote the demulsification of the emulsified asphalt, and can control the strength formation time of an emulsified asphalt mixed material; the modified polyurethane emulsified asphalt concrete has better road performance.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a modified polyurethane emulsified asphalt concrete and its preparation method and application. Background technique [0002] With the increase of traffic volume and the phenomenon of overweight vehicles becoming more and more serious, it is easy to cause premature diseases on the asphalt pavement, especially longitudinal and horizontal cracks, potholes and other problems. If it is not treated in time, the moisture will penetrate into the surface layer and the base layer, which will accelerate the damage of the pavement. Existing pavement repair materials mainly include hot asphalt and emulsified asphalt. Hot asphalt repair materials have problems such as waste of energy, polluting the environment, and inconvenience in construction; emulsified asphalt repair materials have insufficient bonding strength with the surrounding pits and slow demulsification speed. , slow strength mold...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/76C08L75/06C08L83/04C08K5/12C08K5/42C04B26/26C04B24/28C04B111/72C04B111/70
Inventor 张荣辉郑洋罗旭东
Owner GUANGDONG UNIV OF TECH