A kind of SBS modified asphalt and preparation method thereof

A technology of modified asphalt and modifier, which is applied in building components, building insulation materials, buildings, etc., can solve the problems of increased cost of addition, excessive addition of SBS, unstable sample properties, etc., and achieves a simple and easy process. , The effect of saving the amount of addition and easy operation

Active Publication Date: 2015-08-26
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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  • A kind of SBS modified asphalt and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take the raw materials used according to the following parts by weight:

[0030] Heavy traffic asphalt 100 parts

[0031] Minus third-line furfural extract oil 6.5 parts

[0032] SBS modifier 3.9 parts

[0033] Polyphosphoric acid 1.0 parts

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

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

[0036] b. Add 3.9 parts of SBS modifier, 6.5 parts of the third-line furfural-reduced oil, and 1.0 part of polyphosphoric acid to the melted heavy traffic asphalt at the same time, cut for 2 hours, add stabilizer and cut for 1 hour, and obtain the sample;

[0037] c. Stir the sample sheared in step b for 4 hours at a temperature of 200°C and a rotational speed of 800r / min to make it fully mixed and uniform to obtain a finished modified asphalt. The technical specifications of the prepared modified asphalt are shown in ...

Embodiment 2

[0039] Take the raw materials used according to the following parts by weight:

[0040] Heavy traffic asphalt 100 parts

[0041] Minus third-line furfural extract oil 6.5 parts

[0042] 3.6 parts of SBS modifier

[0043] 1.2 parts of polyphosphoric acid

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

[0045] a. Weigh 100 parts of heavy traffic asphalt, melt it at 165°C, and heat it to 200°C after melting completely;

[0046] b. Add 3.6 parts of SBS modifier, 6.5 parts of the third-line furfural-reduced oil, and 1.2 parts of polyphosphoric acid to the melted heavy traffic asphalt at the same time, cut for 1 hour, add stabilizer and cut for 0.5 hours, and obtain the sample;

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

Embodiment 3

[0049] Take the raw materials used according to the following parts by weight:

[0050] Heavy traffic asphalt 100 parts

[0051] Minus third-line furfural extract oil 6.5 parts

[0052] SBS modifier 4.0 parts

[0053] 0.8 parts of polyphosphoric acid

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

[0055] a. Weigh 100 parts of heavy traffic asphalt, melt it at 168°C, and heat it to 195°C after melting completely;

[0056] b. Add 4.0 parts of SBS modifier, 6.5 parts of the third-line furfural-reduced oil, and 0.8 parts of polyphosphoric acid to the melted heavy-duty asphalt at the same time, cut for 2 hours, and add stabilizer to cut for 2 hours to obtain a sample;

[0057] c. Stir the sample cut in step b for 3 hours at a temperature of 1000°C and a rotational speed of 1200r / min to make it fully mixed and uniform to obtain a finished modified asphalt. The technical specifications of the prepared modified asphalt are shown in the tabl...

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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 present invention relates to a kind of SBS modified asphalt and preparation method thereof, especially to a kind of preparation method of I-D grade modified asphalt, especially to a kind of preparation method of the modified asphalt which adds polyphosphoric acid to the asphalt, belongs to the road construction material technology field. Background technique [0002] Polymer modified asphalt is a new type of high-quality road construction material with high technical content and high added value. It improves the performance by mixing polymers into road asphalt, which can significantly prolong the service life of the road surface, reduce noise, and improve driving performance. 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 in high-grade pavements such as the upper layer of expressways, heavy traffi...

Claims

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Application Information

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Patent Type & Authority Patents(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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