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Emulsified asphalt and preparation method thereof

A technology for emulsified asphalt and asphalt, used in the processing of tar asphalt/petroleum asphalt/natural asphalt, building components, building insulation materials, etc. To avoid problems such as poor cohesion, avoid freezing shrinkage cracking or freeze-thaw loosening, good stability and anti-freeze-thaw performance, and good mixing performance

Active Publication Date: 2011-11-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can also be seen from the Marshall stability data in its examples that the cohesiveness of the mixture is not good, so the stability is small
[0004] CN101148544A discloses a kind of asphalt emulsion for cold pouring and its preparation method. A small amount of solvent oil is used in this asphalt emulsion. Although the amount of diesel oil or kerosene is lower than that of CN1554708A, it will still make the cohesiveness of asphalt to a certain extent Worse, and will increase costs, pollute the air
In addition, CN101148544A uses a cationic emulsifier or an anionic emulsifier alone, because the asphalt emulsification system is relatively complicated, and the emulsifier is single, there will be problems in the storage stability of the emulsion
In addition, ethylene glycol or glycerol is used in this patent. Although the two have good antifreeze performance, they are not easy to volatilize because of their high boiling points. After application, they remain in the mixture, which will make the asphalt's cohesiveness worse. Make the mixture difficult to harden, and the adhesion between the new material and the old road surface is poor, and it is difficult to form a stable bonding layer

Method used

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  • Emulsified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take 6400g of straight-run bitumen from Liaohe crude oil with a penetration of 1481 / 10mm, and heat it to 115°C for later use. Get anionic emulsifier fat (16) alcohol polyoxyethylene (3) sodium ether sulfate 5g, zwitterionic emulsifier N-cocoyl-beta-alanine sodium 50g, nonionic emulsifier oleyl alcohol polyoxyethylene (20) Dissolve 100g of ether in 2375g of water. After the emulsifier is fully dissolved, add 1070g of isopropanol, stir well, heat to 42°C, and prepare soap for later use. Then the soap liquid and asphalt are transported to the colloid mill respectively, after being uniformly dispersed and ground by the colloid mill, it becomes an oil-in-water emulsion, and then the temperature of the emulsion is lowered to below 60°C by the cooler, and the emulsion flows out from the outlet of the system to obtain the anti-corrosion emulsion. Freezing emulsified asphalt. The specific results are shown in Table 1.

Embodiment 2

[0029] Take 6000g of Oman crude oil solvent-deoiled bitumen from Maoming Petrochemical Company with a penetration of 981 / 10mm, and heat it to 125°C for later use. Get anionic emulsifier fat (18) amine polyoxyethylene (4) sodium sulfate 550g, zwitterionic emulsifier N-lauryl-β-alanine 3g, nonionic emulsifier octylphenol polyoxyethylene (20 ) ether 2g, dissolved in 2045g of water, after the emulsifier is fully dissolved, then add 400g of ethanol, 1000g of tert-butanol, stir well, heat to 50°C, and prepare soap for later use. Then the soap liquid and asphalt are transported to the colloid mill respectively, after being uniformly dispersed and ground by the colloid mill, it becomes an oil-in-water emulsion, and then the temperature of the emulsion is lowered to below 50°C by the cooler, and it flows out from the outlet of the system to obtain the anti-corrosion emulsion. Freezing emulsified asphalt. The specific results are shown in Table 1.

Embodiment 3

[0031]Take 4200g of Kuwait crude oil oxidized bitumen from Qilu Petrochemical Company with a penetration of 561 / 10mm, and heat it to 155°C for later use. Get 200g of anionic emulsifier sodium lauryl sulfate, 10g of zwitterionic emulsifier N-tallow-β-iminodipropionate disodium, and nonionic emulsifier lauryl polyoxyethylene (20) ether 12g , dissolved in 3578g of water, after the emulsifier is fully dissolved, then add 2000g of propanol, stir well, heat to 55°C, and prepare soap for later use. Then the soap liquid and asphalt are sent to the colloid mill respectively, after being evenly dispersed and ground by the colloid mill, it becomes an oil-in-water emulsion, and then the temperature of the emulsion is lowered to below 70°C by the cooler, and the emulsion flows out from the outlet of the system to obtain the anti-corrosion emulsion. Freezing emulsified asphalt. The specific results are shown in Table 1.

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Abstract

The invention discloses emulsified asphalt and a preparation method thereof. The emulsified asphalt comprises asphalts, anionic emulsifiers, zwitterionic emulsifiers, a non-ionic emulsifier, alcohols and water, wherein the alcohols are one or more of ethanol, propanol, isopropanol and tert butyl alcohol. The emulsified asphalt has the following advantages: the emulsified asphalt uses lower fatty alcohols; without adding such diluents as diesel or kerosene, the emulsified asphalt can be used for shortening the time of moisture volatilization, speeding up mixture hardening and improving the frost resistance, is not frozen at minus 5-minus 25 DEG C, maintains such excellent properties of the original asphalts as caking property and can be used for avoiding low-temperature shrinkage crack or freeze thawing and looseness of a mixture in winter; and meanwhile, the compound emulsifier is adopted, thus not only lowering the cost but also being beneficial to improvement of the frost resistance of the emulsified asphalt and the Marshall stability of the mixture. The emulsified asphalt has frost resistance and can be used for highway maintenance and repair.

Description

technical field [0001] The invention relates to an emulsified asphalt and a preparation method thereof, in particular to a frost-resistant emulsified asphalt and a preparation method thereof. The emulsified asphalt can be used for road maintenance and repair. Background technique [0002] In the process of road maintenance and repair, emulsified asphalt is one of the commonly used materials. Compared with hot asphalt, it has the advantages of energy saving, convenient use, and environmental protection. However, the emulsified asphalt used in the past has the disadvantage of poor frost resistance, and it is easy to break the emulsification due to freezing during winter storage, so that it cannot continue to be used. In addition, the pavement paved with emulsified asphalt is prone to low-temperature shrinkage cracking or freeze-thaw loosening in winter, which is also caused by the poor frost resistance of the emulsified asphalt used. The past emulsified asphalt can only be u...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L71/02C08K5/17C08K5/41C10C3/00
Inventor 陈保莲张静范思远宁爱民程国香李志军
Owner CHINA PETROLEUM & CHEM CORP
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