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Sulfur emulsified asphalt and preparation method thereof

A technology of emulsified asphalt and sulfur, which is applied in climate change adaptation, building components, building insulation materials, etc., can solve the problems of poor anti-rutting and water damage resistance, low strength of sulfur-emulsified asphalt mixture, and failure to achieve hot-mix asphalt mixture and other problems, to achieve the effect of improving high temperature stability and anti-rutting ability

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large amount of water in the oil-in-water emulsified asphalt, the strength of the sulfur emulsified asphalt mixture is low, and the resistance to rutting and water damage is poor. Even if the mixing temperature is increased, it cannot reach the level of hot mix asphalt mixture.

Method used

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  • Sulfur emulsified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 500g of No. 130 B-grade asphalt mixed with certain road asphalt, petroleum residue and coal tar pitch, with a penetration of 138 (0.1mm) and a softening point of 41°C, heated in an oven at 110°C for 4 hours, then moved to the same temperature, Heating and stirring in the heating mantle with stirring device; 5.4g glycerol monostearate, 3.2g ethylene glycol fatty acid ester and 2.2g carbon black mixture are added in the base asphalt and stir evenly, adopt titration method to mix 27g Water is added to the base asphalt mixed with emulsifier at a rate of 800-4000 drops / min and stirred evenly to form water-in-oil emulsified asphalt. Then add 20g of sulfur powder into the water-in-oil emulsified asphalt at 90°C and mix for 20 minutes to form sulfur emulsified asphalt. The stirring speed mentioned in the above process is 500 rpm, and the properties of the sulfur emulsified asphalt are shown in Table 1.

Embodiment 2

[0024] 500g of No. 130 B-grade asphalt mixed with certain road asphalt, petroleum residue and coal tar pitch, with a penetration of 138 (0.1mm) and a softening point of 41°C, heated in an oven at 110°C for 4 hours, then moved to the same temperature, Heat and stir in a heating mantle with a stirring device, add the mixture of 5.4g sorbitan trioleate, 3.2g propylene glycol fatty acid ester and 2.2g carbon black to the base asphalt and stir evenly. Spray 27g of water intermittently into the base asphalt mixed with emulsifier in the form of small droplets in the pipe with a nozzle and stir evenly. Spray in 2 times on average with an interval of 10 minutes between each time. After fully stirring, the oil is formed. For water-in-oil emulsified asphalt, add 20g of sulfur powder to water-in-oil emulsified asphalt at 95°C and mix for 30 minutes to form sulfur emulsified asphalt. The stirring speed in the above process is 600 rpm. The properties of sulfur emulsified asphalt are shown i...

Embodiment 3

[0026] 500g of No. 110 grade B asphalt mixed with certain road asphalt, petroleum residue oil and coal tar pitch, with a penetration of 113 (0.1mm) and a softening point of 44°C, heated in an oven at 120°C for 4 hours, then moved to the same temperature, Heat and stir in a heating mantle with a stirring device, mix 5.2g polyoxyethylene sorbitan beeswax derivative, 4.3g propylene glycol fatty acid ester, 3.5g sorbitan tristearate, 2.6g glycerol monostearate Add the mixture of ethylene glycol fatty acid ester and 1.7g ethylene glycol fatty acid ester into the base asphalt and stir evenly. Use the titration method to add 58g of water into the base asphalt mixed with emulsifier at a rate of 500~2000 drops / min and stir evenly. Stir fully to form water-in-oil emulsified asphalt, then add 50g of sulfur powder to the water-in-oil emulsified asphalt at 100°C and mix for 40 minutes to form sulfur emulsified asphalt. The stirring speed described in the above process is 400 rpm, and the p...

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Abstract

The invention discloses sulfur emulsified asphalt and a preparation method thereof. The sulfur emulsified asphalt is in a water-in-oil type and comprises the following components by weight: 30-97% of matrix asphalt, 0.9-34% of water, 1-6% of emulsifier and 1-30% of sulfur. The preparation method comprises the following steps: the emulsifier is added into the matrix asphalt in a melted state and is uniformly mixed, a certain amount of water is slowly dripped into the matrix asphalt containing the emulsifier and is uniformly mixed, water is dispersed in the asphalt containing the emulsifier in a fine micro-ball state, and then water-in-oil emulsified asphalt is formed; then sulfur is added into the water-in-oil emulsified asphalt and mixed uniformly and has a full reaction with the asphalt to obtain the sulfur emulsified asphalt. The high-temperature stability of the sulfur emulsified asphalt is good, the preparation temperature of the sulfur emulsified asphalt and the mix temperature of an asphalt mixture are low, the anti-track performance of the mixture is good, volatilization of harmful gas and a thermal aging phenomenon of asphalt are reduced, and the sulfur emulsified asphalt and the preparation method are environment-friendly and save energy.

Description

technical field [0001] The invention relates to a preparation method of sulfur emulsified asphalt, in particular to a preparation method of water-in-oil type sulfur emulsified asphalt. Background technique [0002] When oil refineries produce clean fuels, they by-produce a large amount of sulfur, which makes the sulfur market present a situation of oversupply. Sulfur is a flammable, explosive and dangerous chemical. If it is buried deep, it is a waste. How to effectively use sulfur has become an urgent problem to be solved. At present, one application of sulfur is as an additive added to asphalt for road paving to improve the anti-rutting performance of asphalt mixture pavement. [0003] CN201310033455.9 introduces a method for preparing sulfur-modified asphalt, specifically adding sulfur, gypsum whiskers, and smoke inhibitors to base asphalt. CN200410037665.6 introduces a sulfur-modified asphalt mixture, the formula of its modified particles is: sulfur 50%~99.99%, carbon ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K3/06C08K3/04C08J3/03
CPCY02A30/30
Inventor 张静陈保莲刘树华宁爱民李志军程国香范思远陈闯郭皎河
Owner CHINA PETROLEUM & CHEM CORP
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