Modified emulsified asphalt and preparation method thereof

A technology of emulsifying asphalt and modification, which is applied in the direction of building components, rails, building insulation materials, etc. It can solve the problems of difficult emulsification of modified asphalt, affecting the curing time of mortar, and demanding equipment requirements, etc., to achieve water reduction and defoaming effects Obvious, improve the emulsification effect, improve the effect of performance

Active Publication Date: 2014-05-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the flexibility and weather resistance of cement asphalt mortar, CN101508848A utilizes modified asphalt, cationic surfactant, nonionic surfactant, stabilizer to prepare modified emulsified asphalt, although the weather resistance and flexibility of CA mortar can be improved, However, the emulsification of modified asphalt is difficult, and the requirements for equipment are harsh. The emulsifier dosage required is large. The total amount of surfactants reaches 7.1%. The amount of water reducer and defoamer added when preparing mortar is also large. The

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take 6470g of Liaohe crude oil straight-run asphalt with a penetration of 108 (1 / 10mm) and heat it to 115°C for use to obtain material I; at room temperature, 10g calcium lignosulfonate and 7g methyl silicone oil (303-20) , 80g isopropanol, after mixing uniformly, slowly add 1g of carboxymethyl cellulose under stirring, and stir well to make a paste to obtain material II; chlorinate the cationic emulsifier cetyltrimethyl Ammonium 30g, anionic emulsifier fat (18) alcohol polyoxyethylene (3) sodium ether sulfate 30g, zwitterionic emulsifier N-coco-β-aminopropionate sodium 10g, non-ionic emulsifier oleyl alcohol 10g of polyoxyethylene (20) ether and 5g of calcium chloride were dissolved in 3247g of water and kept at a temperature of 45°C to obtain material III; accurately weigh 100 g of 60% styrene butadiene latex as material IV; then add material I , Material II, Material III, Material IV are respectively transported to the colloid mill, and after being evenly dispersed by...

Embodiment 2

[0040] Take 6000g of Oman crude oil solvent deoiled asphalt from Maoming Petrochemical Company with a penetration of 98 (1 / 10mm) and heat it to 125°C for use to obtain material I; at room temperature, 40g naphthalenesulfonic acid formaldehyde condensate, polyoxyethylene Oxypropylene glycerin (GPE30) 5g, ethanol 60g, tert-butanol 100g, after mixing evenly, slowly add 5g carboxyethyl cellulose under stirring, and stir well to make a paste to obtain material II; emulsify cationic Octadecyl trimethyl ammonium chloride 125g, anionic emulsifier fat (18) amine polyoxyethylene (4) sodium sulfate 55g, zwitterionic emulsifier N-tallowyl-β-iminodipropionic acid Disodium 69g, nonionic emulsifier octylphenol polyoxyethylene (20) ether 50g, ammonium chloride 15g, dissolve in 3276g water, stir well, prepare into soap liquid and keep the temperature at 65℃ to obtain material III ;Accurately weigh 200 g of neoprene latex with a concentration of 55% as material IV; then transport material I, mat...

Embodiment 3

[0042] Take 5900g of Kuwait crude oil oxidized pitch from Qilu Petrochemical Company with a penetration of 62 (1 / 10mm) and heat it to 155°C to obtain material I; at room temperature, 25 g of sulfonated melamine-formaldehyde condensate and higher alcohol fatty acid Ester (C18, concentration 30wt%) 9g, propanol 320g, after mixing well, slowly add 3 g of hydroxyethyl cellulose under stirring, and stir well to make a paste to obtain material II; take cationic emulsification Dodecyltrimethylammonium bromide 55g, anionic emulsifier sodium lauryl sulfate 90g, zwitterionic emulsifier N-lauryl-β-alanine 30g, nonionic emulsifier lauryl alcohol 30g of polyoxyethylene (20) ether, 10g of magnesium chloride, dissolved in 3278g of water at 55°C, stirred well to prepare a soap solution and kept the temperature at 55°C to obtain material III; accurately weigh 250 g of 50% concentration Nitrile latex is used as material IV; then material I, material II, material III, and material IV are respecti...

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Abstract

The invention discloses modified emulsified asphalt and a preparation method thereof. The modified emulsified asphalt comprises the following components by weight: 55%-65% of asphalt, 0.3%-1.5% of cationic emulsifiers, 0.3%-1.5% of anionic emulsifiers, 0.05%-0.15% of stabilizing agents, 0.01%-0.05% of thickening agents, 0.1%-0.5% of water reducers, 0.8%-3.5% of alcohol, 1%-4% of polymer latex, and 30%-35% of water. The modified emulsified asphalt of the invention is good in miscibility with cement, good in storage stability, and low in oversize residual amount, and also has the advantages of freezing resistance, no bleeding, good flexibility, and good caking property. The modified emulsified asphalt of the invention is especially applicable to cement injection asphalt mortar for preparing plate-type ballastless tracks in high speed railway building.

Description

Technical field [0001] The invention relates to a modified emulsified asphalt and a preparation method thereof, in particular to a modified emulsified asphalt for cement asphalt mortar and a preparation method thereof. Background technique [0002] With the improvement of the level of railway construction and the improvement of railway transportation capacity, the demand for high-speed railways and urban light rails is increasing. In order to improve the stability of trains during high-speed operation and reduce the noise generated by train operations, plate-type ballastless is generally required Orbital technology. The slab ballastless track technology is to lay two tracks on a reinforced cement concrete slab (called track slab), and lay a 3-5cm thick shock-absorbing layer under the track slab. The shock-absorbing layer is made of emulsified asphalt, cement, fine Sand and other mineral materials form cement asphalt mortar (Cement Asphalt mortar, CA mortar for short). This tech...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08K3/16C08K5/05C08J3/03C04B26/26E01B27/18
Inventor 陈保莲范思远张静陈闯宁爱民李志军程国香
Owner CHINA PETROLEUM & CHEM CORP
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