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Polyurethane asphalt concrete as well as preparation method and application thereof

An asphalt concrete and polyurethane technology, applied in the field of asphalt concrete, can solve the problems of poor road performance, poor durability, environmental pollution, etc., and achieve the effects of extending service life, good durability and reducing environmental pollution.

Active Publication Date: 2014-02-19
重庆市智翔铺道技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in recent years, the molding products that have been widely promoted and applied in the market are all solvent-based cold-mix asphalt mixtures, while the application of reactive-type cold-mix asphalt mixtures is still blank in the domestic and foreign markets.
Although traditional cold-mix asphalt mixtures can achieve mixing construction at room temperature to a certain extent and reduce energy consumption, compared with hot-mix asphalt materials, the volatilization of solvents causes environmental pollution, poor road performance, and poor durability. , can no longer meet the current requirements for asphalt materials

Method used

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  • Polyurethane asphalt concrete as well as preparation method and application thereof
  • Polyurethane asphalt concrete as well as preparation method and application thereof
  • Polyurethane asphalt concrete as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of polyurethane bituminous concrete is prepared according to the following steps:

[0030] Add 90kg of polyether diol (molecular weight 1000) into the reaction kettle, the temperature in the kettle is 100-120°C, after vacuum dehydration for 2-3 hours, cool down to 60-70°C, add 18kg of polymethylene polyphenyl polyisocyanate, 0.24kg of dibutyltin dilaurate (DBDTL), 12kg of dioctyl phthalate (DOP), under the condition of nitrogen protection, react at 80-90°C for 4h and cool to about 60°C to prepare polyurethane prepolymer body.

[0031] After heating 60kg of road petroleum asphalt (70#) to melting, mix it with 60kg of gasoline and stir evenly to obtain diluted asphalt.

[0032] Select 1.6t of basalt fine aggregate and 2.4t of basalt coarse aggregate (the nominal particle size of the coarse aggregate is 4.75mm<Φ≤9.5mm, the nominal particle size of the fine aggregate is Φ<4.75mm), and set aside. Mix the prepared diluted asphalt with polyurethane prepolymer, and sti...

Embodiment 2

[0034] A kind of polyurethane bituminous concrete is prepared according to the following steps:

[0035] Add 72kg polyethylene glycol (molecular weight 400) into the reaction kettle, the temperature in the kettle is 100-120°C, after vacuum dehydration for 2-3 hours, cool down to 60-70°C, add 36kg toluene diisocyanate (TDI), 0.4kg triethylene glycol Base diamine, 12kg dibutyl phthalate (DBP), under the condition of nitrogen protection, react at 80-90°C for 4h and cool to about 60°C to prepare polyurethane prepolymer.

[0036] After heating 60kg of road petroleum asphalt (70#) to melting, mix it with 60kg of diesel oil and stir evenly to obtain diluted asphalt.

[0037] Next, according to the same method as in Example 1, high-performance polyurethane asphalt concrete 2# was prepared.

Embodiment 3

[0039] A kind of polyurethane bituminous concrete is prepared according to the following steps:

[0040]Add 88kg of polyether diol (molecular weight: 1000) into the reaction kettle, the temperature inside the kettle is 100-120°C, vacuumize and dehydrate for 2-3 hours, then lower the temperature to 60-70°C, add 20kg of 1,6-hexamethylene diisocyanate, 0.48kg Dibutyltin dilaurate (DBDTL), 12kg dioctyl phthalate (DOP), under the condition of nitrogen protection, react at 80-90°C for 4h and cool to about 60°C to prepare polyurethane prepolymer.

[0041] After heating 60kg of road petroleum asphalt (70#) to melting, mix it with 60kg of gasoline and stir evenly to obtain diluted asphalt.

[0042] Next, according to the same method as in Example 1, high-performance polyurethane asphalt concrete 3# was prepared.

[0043] The polyurethane asphalt concrete described in the present invention is formed into a test piece, cured and tested according to the specification "Test Regulations fo...

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Abstract

The invention discloses polyurethane asphalt concrete prepared from aggregate, diluted asphalt and polyurethane prepolymer which serve as raw materials, wherein the aggregate is basalt, diabase or limestone; the diluted asphalt is a mixture formed by diluting road petroleum asphalt and gasoline or diesel at a weight ratio of 100:(18-100); and the polyurethane prepolymer is prepared by reacting isocyanate with a polyalcohol compound, a catalyst and a plasticizer. The polyurethane asphalt concrete serving as cool-mixed and cool-spread type asphalt concrete is applied to pavement or repair of an asphalt road surface; compared with the conventional hot state technology for a hot-mixed and hot-repaired asphalt mixture, the polyurethane asphalt concrete has the advantages that the energy is saved, emission of a large amount of greenhouse gas and emission of toxic and harmful gas during asphalt heating are reduced, the surrounding environment is protected, and the environment pollution is reduced; and furthermore, the polyurethane asphalt concrete is operated easily and high in efficiency and cannot be limited by a transparent condition, a repair dispersion condition and the like during production and construction.

Description

technical field [0001] The invention relates to an asphalt concrete, in particular to a polyurethane asphalt concrete and its preparation method and application. Background technique [0002] In recent decades, with the continuous improvement of road grades, higher requirements have been put forward for asphalt materials, which has prompted further research work. Various modified asphalts have emerged, such as adding rubber, resin, sulfur and other polymers to asphalt to improve the road performance of asphalt concrete. However, traditional asphalt mixtures are hot-mixed and hot-paved materials. Viscous asphalt is used as a binder, and it is necessary to mix asphalt and mineral materials in a hot state and pave in a hot state. Obviously, the required energy consumption is high, the impact on the environment is great, and the corresponding material cost has also increased. Therefore, many researchers are devoting themselves to finding alternatives to hot mix production. Un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
Inventor 徐光红李璐盛兴跃郝增恒
Owner 重庆市智翔铺道技术工程有限公司
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