Waterborne polyurethane emulsified asphalt concrete as well as preparation method and application thereof

A technology of water-based polyurethane and emulsified asphalt, which is applied in the field of road engineering, can solve the problems of low content of water-based polyurethane, no application performance evaluation, insufficient contribution of strength, etc., and achieve easy modification, excellent mechanical properties, stability and compatibility Good results

Inactive Publication Date: 2014-12-03
山东大山绿道工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent CN201110188772.9 discloses a water-based polyurethane epoxy resin modified emulsified asphalt, which is a polyurethane epoxy resin formed by reacting isocyanate with polyol chain extension and epichlorohydrin or epoxy resin, supplemented by polyether polyol Emulsifier, additives and water to form water-based polyurethane epoxy resin, modified emulsified asphalt, and cured with modified aliphatic amine epoxy resin curing agent, the synthesis process is complicated, there are many influencing factors, and the uniformity is difficult Guarantee; at the same time, the content of water-based polyurethane is too low, and the contribution to the strength is insufficient, and the application performance of the material is not evaluated in the patent

Method used

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  • Waterborne polyurethane emulsified asphalt concrete as well as preparation method and application thereof
  • Waterborne polyurethane emulsified asphalt concrete as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Preparation of emulsified asphalt

[0036] Prepare materials according to the following weight ratio:

[0037] Bitumen 110g

[0038] water 90g

[0039] Sodium Lauryl Sulfate 4g

[0040] Mix water and sodium dodecylsulfonate, and stir at 60°C to fully dissolve into a uniform emulsion, and use sodium hydroxide buffer to control the pH of the emulsion at 12; heat the asphalt to 140°C, pour Emulsification was carried out in the prepared homogeneous emulsion, and the emulsification time was 4 minutes; the solid content of the prepared emulsified asphalt was 54%.

[0041] 2) Preparation of waterborne polyurethane emulsified asphalt concrete

[0042] Mix 100g of emulsified asphalt with 40g of water-based polyurethane emulsion, and use a low-speed stirrer to fully stir for 5 minutes to obtain a uniform, non-sticky brown mixture, which is the water-based polyurethane emulsified asphalt emulsion;

[0043] Put the water-based polyurethane emulsified asphalt emulsion in a m...

Embodiment 2

[0047] 1) Preparation of emulsified asphalt

[0048] Prepare materials according to the following weight ratio:

[0049] Bitumen 160g

[0050] water 50g

[0051] Octylphenol ethoxylate 2g

[0052] Mix water and octylphenol polyoxyethylene ether, and stir at 55°C to fully dissolve into a homogeneous emulsion; heat the asphalt to 120°C, pour it into the prepared homogeneous emulsion for emulsification, and the emulsification time is 5 minutes; The solid content of emulsified bitumen is 75%.

[0053] 2) Preparation of waterborne polyurethane emulsified asphalt concrete

[0054] Mix 200g of nonionic emulsified asphalt with 10g of water-based polyurethane emulsion, and use a low-speed stirrer to fully stir for 10 minutes to obtain a uniform, non-sticky brown mixture, which is the water-based polyurethane emulsified asphalt emulsion;

[0055] Put the water-based polyurethane emulsified asphalt emulsion in a mixing pot, add 1000g of mineral material, stir at room temperature for...

Embodiment 3

[0059] 1) Preparation of emulsified asphalt

[0060] Prepare materials according to the following weight ratio:

[0061] Bitumen 40g

[0062] water 60g

[0063] Cetyltrimethylammonium Chloride 1g

[0064] Mix water and cetyltrimethylammonium chloride, and stir at 65°C to fully dissolve into a uniform emulsion, and use hydrochloric acid buffer to control the pH of the emulsion at 3; heat the asphalt to 160°C; The heated asphalt is poured into the prepared emulsion for emulsification, and the emulsification time is 3 minutes; the solid content of the prepared emulsified asphalt is 40%.

[0065] 2) Preparation of waterborne polyurethane emulsified asphalt concrete

[0066] Mix 70g of cationic emulsified asphalt with 200g of water-based polyurethane emulsion, and use a low-speed stirrer to fully stir for 2 minutes to obtain a uniform, non-sticky brown mixture, which is the water-based polyurethane emulsified asphalt emulsion;

[0067] Put the water-based polyurethane emulsifi...

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Abstract

The invention discloses a waterborne polyurethane emulsified asphalt concrete which is prepared from the following raw materials: mineral aggregates, emulsified asphalt and waterborne polyurethane emulsion, wherein the weight ratio of the mineral aggregates, the emulsified asphalt and the waterborne polyurethane emulsion is 100:(1-20):(7-20). The invention also discloses a preparation method of the waterborne polyurethane emulsified asphalt concrete, and the preparation method comprises the following steps: mixing the waterborne polyurethane emulsion with the emulsified asphalt, and uniformly stirring, so that waterborne polyurethane modified emulsified asphalt is obtained; adding the waterborne polyurethane modified emulsified asphalt into the mineral aggregates, uniformly stirring, and carrying out maintenance on the obtained product; or uniformly stirring the mineral aggregates, the emulsified asphalt, and the waterborne polyurethane emulsion, and carrying out maintenance on the obtained product. The prepared waterborne polyurethane emulsified asphalt concrete not only has the advantages of cold-mixed asphaltic concrete, but also has excellent mechanical properties and stability; the waterborne polyurethane emulsified asphalt concrete is excellent in pavement performance, and can be used for greatly prolonging the service life of pavements; and the maintenance time is short, and the traffic can be implemented in 1-3 days, therefore, the waterborne polyurethane emulsified asphalt concrete can be applied to the preparation of asphalt concrete paving materials, asphalt pavement repair materials, slurry seals for maintenance and asphalt mortar for micro-surfacing and high-speed railways.

Description

technical field [0001] The invention belongs to the field of road engineering, and relates to an emulsified asphalt concrete and a preparation method thereof, in particular to a water-based polyurethane emulsified asphalt concrete, a preparation method and an application thereof. Background technique [0002] The traditional cold-mix asphalt mixture can achieve normal temperature mixing construction to a certain extent and reduce energy consumption. However, the road performance of cold-mix asphalt mixture is poor, and it cannot meet the requirements of modern roads for asphalt materials. Quality paving or minor repairs. [0003] Water-based polyurethane emulsion refers to the polyurethane that uses water as the dispersion medium and does not contain or contains a small amount of organic solvent in the system. Pollution, safety and reliability, good compatibility, easy modification and other advantages, has gradually replaced solvent-based polyurethane, widely used in coati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
Inventor 曹东伟张艳君李盈富张海燕贾晓鹏
Owner 山东大山绿道工程科技有限公司
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