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Frost resistant emulsified bitumen prepared from composite emulsifier, and preparation method thereof

A technology of emulsified asphalt and emulsifier, 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 The problem of poor adhesion, etc., to achieve the effect of improved frost resistance and Marshall stability, good stability and freeze-thaw resistance, and high adhesion

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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  • Frost resistant emulsified bitumen prepared from composite emulsifier, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 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 330g, anionic emulsifier fat (18) alcohol polyoxyethylene (3) ether sodium sulfate 20g, zwitterionic emulsifier N-cocoyl-β- Sodium allanate 50g, non-ionic emulsifier oleyl alcohol polyoxyethylene (20) 1g, dissolve in 2129g water together, after the emulsifier is fully dissolved, add 1070g isopropanol, stir well, heat to 42°C , prepared into soap solution 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 Tabl...

Embodiment 2

[0031]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 50g, anionic emulsifier fat (18) amine polyoxyethylene (4) sodium sulfate 1g, zwitterionic emulsifier N-lauryl-β-aminopropyl Acid 1g, non-ionic emulsifier octylphenol polyoxyethylene (20) ether 30g, dissolved in 2518g water, after the emulsifier is fully dissolved, then add 400g ethanol, 1000g tert-butanol, stir well, heat to 50°C , prepared into soap solution 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. ...

Embodiment 3

[0033] 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 2g, anionic emulsifier sodium lauryl sulfate 50g, zwitterionic emulsifier N-tallow group-β-iminodipropionic acid di Sodium 6g, non-ionic emulsifier lauryl alcohol polyoxyethylene (20) ether 70g, dissolved in 3672g water, after the emulsifier is fully dissolved, then add 2000g propanol, stir well, heat to 55°C, and prepare soap spare. 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 bitumen which is prepared from a composite emulsifier, and a preparation method thereof. The emulsified bitumen comprises bitumen, a cationic emulsifier, an anionic emulsifier, an amphoteric emulsifier, a nonionic emulsifier, an alcohol and water. The alcohol comprises one or more selected from ethanol, propanol, isopropanol and tert butyl alcohol. With the present invention, a combination of the composite emulsifier and the low molecular weight fatty alcohol is adopted for the emulsified bitumen while diluents such as diesel oil or kerosene and the like are not added, such that time of water evaporation is shortened, a hardening rate of mixture is increased, frost resistance is improved (the emulsified bitumen cannot be frozen at a temperature of -5 to -25 DEG C), original excellent properties such as bonding performance of the bitumen and the like are maintained, and shrinkage and cracking of the mixture due to a low temperature in winner or surface loosening of the mixture due to freeze thawing is avoided. The frost resistant emulsified frost resistant can be used for road curing and road maintenance.

Description

technical field [0001] The invention relates to an emulsified asphalt and a preparation method thereof, in particular to a frost-resistant emulsified asphalt prepared by using a composite emulsifier and a preparation method thereof. The emulsified asphalt of the invention 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 emulsifie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L71/02C08K5/19C08K5/41C08K5/17C10C3/00
Inventor 陈保莲范思远张静李志军程国香宁爱民
Owner CHINA PETROLEUM & CHEM CORP
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