Modified emulsified asphalt as well as preparation method and application thereof

An emulsified asphalt and modified technology, applied in the direction of asphalt material binder, chloroprene binder, non-polymer binder additives, etc., can solve the problem of insufficient shear strength and bonding strength, influence The performance of the pavement structure and the long demulsification time of the emulsified asphalt can reduce the delamination of the pavement, break through the cost limit, and speed up the demulsification speed.

Active Publication Date: 2022-05-13
江西省交投供应链有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the construction of a specific project, ordinary emulsified asphalt or SBS modified emulsified asphalt is often used for the general sticky layer, which is easily damaged by the rolling of construction vehicles during the construction process, and it is easy to cause the interlayer bonding to fail to meet the standard
The poor interlayer bonding state will seriously affect the performance of various pavement structures. During construction, the interlayer treatment effect will not be good, and insufficient shear strength and bond strength will be provided, resulting in interlayer shear damage. Then various diseases appear in the late stage of asphalt pavement
However, if the bond strength is increased blindly, it will easily lead to the decline of low temperature performance, that is, the ductility is poor in low temperature environment, and it is not easy to construct.
At the same time, the existing emulsified asphalt takes a long time to demulsify. After spreading, the construction unit usually needs to wait for several hours before allowing the paving vehicles to enter the site for the paving of the mixture, resulting in a decrease in construction efficiency.
That is to say, it is difficult for the existing technology to balance the three aspects of bonding performance, low temperature performance and construction efficiency

Method used

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  • Modified emulsified asphalt as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The present embodiment provides a modified emulsified asphalt, in parts by weight, consisting of 45 parts of emulsified asphalt, 45 parts of natural rubber latex, 2 parts of neoprene latex, 1 part of nitrile latex, 5 parts of petroleum resin emulsion, 1.5 parts of terpene resin emulsion 0.5 parts and 0.5 parts of sodium vinyl sulfonate emulsion.

[0039] This embodiment also provides the preparation method of the above-mentioned modified emulsified asphalt, the specific steps are as follows:

[0040] Stir the emulsified asphalt and natural rubber latex at room temperature, and use a mixer to stir for 30 minutes at a speed of 1000rpm, and the stirring temperature is 45°C;

[0041] Add neoprene latex, nitrile latex and petroleum resin emulsion to the above mixed solution, and stir for 30min at a speed of 1000rpm with a stirrer;

[0042] Add the sodium vinyl sulfonate emulsion, and then add the terpene resin emulsion, and stir for 30 minutes at a speed of 1000 rpm with a ...

Embodiment 2

[0044] The present embodiment provides a modified emulsified asphalt, in parts by weight, consisting of 40 parts of emulsified asphalt, 50 parts of natural latex, 0.5 part of neoprene latex, 0.5 part of nitrile latex, 6 parts of petroleum resin emulsion, 2 parts of terpene resin emulsion 1 part and 1 part of sodium vinyl sulfonate emulsion.

[0045] Its preparation method is with embodiment 1.

Embodiment 3

[0047] The present embodiment provides a modified emulsified asphalt, in parts by weight, consisting of 55 parts of emulsified asphalt, 30 parts of natural rubber latex, 1 part of neoprene latex, 1 part of nitrile latex, 9 parts of petroleum resin emulsion, 3 parts of terpene resin emulsion 1 part and 1 part of sodium vinyl sulfonate emulsion.

[0048] Its preparation method is with embodiment 1.

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Abstract

The invention provides modified emulsified asphalt and a preparation method and application thereof.The modified emulsified asphalt comprises emulsified asphalt, a modifier and a stabilizer, the modifier is composed of natural latex, petroleum resin emulsion and third modified liquid, and the third modified liquid is at least one of neoprene latex, butyronitrile latex and terpene resin emulsion. The natural latex, the petroleum resin emulsion and the third modified liquid are compounded, so that the bonding strength and the low-temperature performance of the emulsified asphalt can be well considered, and other complicated modification steps are not needed. Meanwhile, the modified emulsified asphalt can accelerate the demulsification speed, has the characteristic of no adhesion to wheels, allows paving equipment to construct on an adhesive layer material, does not influence the adhesive layer quality and cause performance loss due to adhesion of asphalt to a tire in the construction process, has good adhesive strength of a formed adhesive layer surface, improves the construction efficiency, and has good application prospects. And the diseases such as pavement delamination and fatigue cracking caused by bonding failure are reduced.

Description

technical field [0001] The invention relates to the technical field of road materials, in particular to a modified emulsified asphalt and its preparation method and application. Background technique [0002] Thin layer overlay is an ultra-thin asphalt concrete wear layer technology, mainly used for preventive maintenance of high-grade asphalt or cement pavement and corrective maintenance of minor diseases. Generally speaking, the service life of general expressway pavement is at least 6 years, but an excellent thin-layer overlay can effectively prolong the service life of expressways, and usually can make the service life reach more than 8-10 years. At the same time, the rough surface of the wear layer can increase the skid resistance of the wheel, effectively reduce noise, and has better water permeability, which can greatly reduce the common water mist in rainy days and improve visibility. [0003] Because the thin-layer overlay often does not have a large thickness (gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L7/02C08L11/02C08L9/04C08L57/02C08L45/00C08K5/42C09J195/00C09J107/02C09J111/02C09J109/04C09J157/02C09J145/00C09J11/06
CPCC08L95/00C08L7/02C09J195/00C09J107/00C09J11/06C08L11/02C08L9/04C08L57/02C08L45/00C08K5/42
Inventor 易明李刚丁润铎张海燕赵立东吴焘朱继双张艳君吴文强孟宪东冯冬林贾晓鹏
Owner 江西省交投供应链有限公司
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