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Frost-resistant emulsified asphalt for roads and preparation method thereof

A technology of emulsified asphalt and frost resistance, applied in the processing of tar asphalt/petroleum asphalt/natural asphalt, building components, building insulation materials, etc., can solve the problems of emulsion storage stability, poor adhesion of mixtures, Asphalt cohesiveness becomes poor and other problems, to avoid freezing shrinkage cracking or freeze-thaw loosening, reduce the amount of emulsifier, and achieve the effect of large cohesion

Active Publication Date: 2012-12-26
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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  • Frost-resistant emulsified asphalt for roads 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 cationic emulsifier cetyltrimethylammonium chloride 150g, anionic emulsifier stearyl polyoxyethylene (3) sodium sulfate 50g, nonionic emulsifier oleyl polyoxyethylene (18) ether 150g , dissolved in 2180g of water together, after the emulsifier is fully dissolved, then 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 through 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 cationic emulsifier octadecyltrimethylammonium chloride 10g, anionic emulsifier fat (18) amine polyoxyethylene (3) sodium sulfate 5g, nonionic emulsifier octylphenol polyoxyethylene (20) Dissolve 5g of ether in 2580g of water. After the emulsifier is fully dissolved, add 400g of ethanol and 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 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 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 cationic emulsifier octadecyltrimethylbenzyl ammonium chloride 220g, anionic emulsifier sodium lauryl sulfate 10g, nonionic emulsifier lauryl polyoxyethylene (20) ether 90g, be dissolved in 3480g In water, after the emulsifier is fully dissolved, 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 frost-resistant emulsified asphalt for roads and a preparation method thereof. The emulsified asphalt comprises asphalts, cationic emulsifiers, anionic 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: through synergistic action of the compound emulsifier and 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 the low-temperature shrinkage crack or freeze thawing and looseness of a mixture in winter. The frost-resistant emulsified asphalt is used for highway maintenance and repair.

Description

technical field [0001] The invention relates to a frost-resistant emulsified asphalt for roads and a preparation method thereof, which 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 used when the temperature is higher than -5°C. When the temperature is lower than...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L71/02C08K5/19C08K5/41C10C3/00
Inventor 陈保莲范思远张静宁爱民程国香李志军
Owner CHINA PETROLEUM & CHEM CORP
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