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SBS (stimulated brillouin scattering) modified asphalt and preparation method thereof

A technology of modified asphalt and modifiers, which is applied in building components, building insulation materials, buildings, etc. It can solve the problems of increased cost of addition, excessive addition of SBS, unstable sample properties, etc., and achieves a simple and easy process , Save the dosage and reduce the cost

Active Publication Date: 2013-09-18
CHINA NAT OFFSHORE OIL CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in the prior art, SBS with high cost is used as a modifier to improve properties such as softening point and ductility of asphalt. Excessive addition of SBS not only increases the cost, but also because SBS is a macromolecular polymer, It is more difficult to disperse in asphalt samples, and it is easy to cause problems such as unstable properties of modified asphalt samples. Its technical deficiencies include: the production of I-D grade SBS modified asphalt has too much SBS added, sample properties Unstable, unstable sample production and other defects

Method used

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  • SBS (stimulated brillouin scattering) modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh the raw materials used in the following parts by weight:

[0030] 100 parts heavy asphalt

[0031] Minus three-line furfural extract 6.5 parts of oil

[0032] SBS modifier 3.9 parts

[0033] 1.0 part of polyphosphoric acid

[0034] A preparation method of SBS modified asphalt includes the following steps:

[0035] a. Melt 100 parts of the weighed heavy bitumen at 160°C, and then heat it to 180°C after melting is complete;

[0036] b. Add 3.9 parts of SBS modifier, 6.5 parts of triline furfural extract oil, and 1.0 part of polyphosphoric acid into the melted heavy-duty asphalt at the same time, shear for 2 hours, and add stabilizer for 1 hour to obtain samples;

[0037] c. The sample after shearing in step b is stirred for 4 hours at a temperature of 200°C and a rotating speed of 800r / min to make it fully mixed to obtain a finished modified asphalt. The technical indicators of the prepared modified asphalt are shown in the table 2 shown.

Embodiment 2

[0039] Weigh the raw materials used in the following parts by weight:

[0040] 100 parts heavy asphalt

[0041] Minus three-line furfural extract 6.5 parts of oil

[0042] 3.6 parts of SBS modifier

[0043] 1.2 parts of polyphosphoric acid

[0044] A preparation method of SBS modified asphalt includes the following steps:

[0045] a. Melt 100 parts of the weighed heavy duty asphalt at 165℃, and then heat it to 200℃ after the melting is complete;

[0046] b. Add 3.6 parts of SBS modifier, 6.5 parts of triline furfural extraction oil, and 1.2 parts of polyphosphoric acid into the molten heavy-duty asphalt at the same time, shear for 1 hour, and add stabilizer for 0.5 hour to obtain samples;

[0047] c. Stir the sample after shearing in step b at a temperature of 500°C and a rotational speed of 600r / min for 3 hours to make it fully mixed to obtain a finished modified asphalt. The technical indicators of the prepared modified asphalt are shown in the table 2 shown.

Embodiment 3

[0049] Weigh the raw materials used in the following parts by weight:

[0050] 100 parts heavy asphalt

[0051] Minus three-line furfural extract 6.5 parts of oil

[0052] SBS modifier 4.0 parts

[0053] 0.8 part of polyphosphoric acid

[0054] A preparation method of SBS modified asphalt includes the following steps:

[0055] a. Melt 100 parts of the weighed heavy duty asphalt at 168℃, and then heat it to 195℃ after melting;

[0056] b. Add 4.0 parts of SBS modifier, 6.5 parts of triline furfural extraction oil, and 0.8 parts of polyphosphoric acid to the molten heavy-duty asphalt at the same time, shear for 2 hours, and add stabilizer for 2 hours to obtain samples;

[0057] c. The sample after shearing in step b is stirred for 3 hours at a temperature of 1000°C and a rotational speed of 1200r / min to make it fully mixed to obtain a finished modified asphalt. The technical indicators of the prepared modified asphalt are shown in the table 2 shown.

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Abstract

The invention provides SBS (stimulated brillouin scattering) modified asphalt and preparation method thereof, belonging to the technical field of road materials. The method comprises the following steps of: by utilizing heavy traffic paving asphalt as a raw material, melting and heating the heavy traffic paving asphalt to 180-200 DEG C, and then, adding an SBS modifier, three line cutting furfural extract oil and polyphosphoric acid into the smelted heavy traffic paving asphalt, shearing, adding a stabilizer, developing and stirring to prepare the SBS modified asphalt. According to the preparation method, the SBS modifier and the polyphosphoric acid are added to modify the heavy traffic paving asphalt, namely, the polyphosphoric acid substitutes a part of SBS modifier, so that the addition dosage of the SBS modifier can be reduced under a consistent part by weight of the heavy traffic paving asphalt, the addition dosage of the SBS modifier can be reduced for about 1-2%, the polyphosphoric acid is added to change the structure of the modified asphalt, the softening point of the prepared modified asphalt is higher than 80 DEG C, and other performance indexes meet related standards for different grades of SBS modified asphalt by the Ministry of transportation. The technique is simple, convenient to operate and suitable for industrial production.

Description

Technical field [0001] The invention relates to an SBS modified asphalt and a preparation method thereof, in particular to a preparation method of an ID-grade modified asphalt, in particular to a preparation method of a modified asphalt obtained by adding polyphosphoric acid to the asphalt, belonging to road construction materials Technical field. Background technique [0002] Polymer modified asphalt is a new type of high-quality road construction material with high technical content and added value. It can improve the service performance by incorporating polymer into the road asphalt, which can significantly extend the life of the road surface, reduce noise, and improve driving. Comfort and safety. SBS modified asphalt has excellent high-temperature anti-rutting, low-temperature anti-cracking, anti-fatigue performance and excellent elastic recovery ability. It is mainly used for high-grade pavements such as the upper layer of expressways, heavy traffic and sections with more o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K13/02C08K3/32
Inventor 徐萌李福起权栋甘为民韩凌王志超卢德庆裴晓光
Owner CHINA NAT OFFSHORE OIL CORP
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