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High-strength modified asphalt

A modified asphalt, high-strength technology, applied in the direction of on-site coagulation pavement, building components, building insulation materials, etc., can solve problems such as insufficient high-temperature stability, improve low-temperature crack resistance, and improve high-temperature stability. , the effect of simple construction process

Inactive Publication Date: 2008-09-24
SOUTHEAST UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem: In order to overcome the problem of insufficient high temperature stability of commonly used road modified asphalt in special occasions, and at the same time take into account the economy, the present invention provides a high-strength modified asphalt, which not only has good economic benefits, but also has high-strength Asphalt has considerable high-temperature stability, and its low-temperature crack resistance is better than that of foreign high-strength asphalt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] SBS: 3.5%

[0019] DBS: 2%

[0020] North American Rock Bitumen: 7%

[0021] Auxiliary modifier doses are fixed, as follows:

[0022] Sulfur: 0.1%

[0023] Urfural extract oil: 2%.

Embodiment 2

[0025] SBS: 4.5%

[0026] DBS: 2.0%

[0027] North American Rock Bitumen: 6.0%

[0028] Auxiliary modifier doses are fixed, as follows:

[0029] Sulfur: 0.1%

[0030] Extracted oil of furfural: 2%.

[0031] The optimal ratio of the high-strength modified asphalt of the present invention is:

[0032] SBS: 4.5%

[0033] DBS: 1.5%

[0034] North American Rock Bitumen: 7%

[0035] 70# ordinary asphalt: 100%

[0036] Sulfur: 0.1%

[0037] Extracted oil of furfural: 2%.

[0038] The method of preparation is:

[0039] a. Through the orthogonal test, determine the mixing ratio of various modifiers in the modified asphalt.

[0040] b. Preparation of modified asphalt. Put a fixed mass of 70# ordinary asphalt into the oven to preheat for about 1 hour, weigh the modifier in proportion, add the weighed SBS and furfural extraction oil into the ordinary asphalt, manually stir it to about 170°C, and keep it for 30 minutes. Make the oil fully swell SBS; when the temperature rises ...

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Abstract

High-strength modified asphalt relates to road modified asphalt material with obvious stability at high temperature; the modified asphalt includes the following components: common asphalt; modifiers: SBS, DBS, uintaite mastic asphalt; auxiliary modifiers: uronic extract oil, sulfur; the mass of the 70# common asphalt is taken as reference quantity 1, and the mass ratio of the mixing amount of all modifiers relatively to the 70# common asphalt is: 3.5 percent to 4.5 percent of SBS, 1 percent to 2 percent of DBS, and 6 percent to 7 percent of uintaite mastic asphalt; and the dosage of the auxiliary modifiers is fixed as below: 0.1 percent of sulfur, and 2 percent of uronic extract oil. The asphalt not only has excellent economic benefits, but also has high-temperature stability equal to that of foreign high-strength asphalt and low-temperature performance better than that of the foreign high-strength asphalt.

Description

technical field [0001] The invention relates to a road-use modified asphalt material with remarkable high-temperature stability, and belongs to the technical field of road surface material manufacturing. Background technique [0002] At present, SBS (styrene-butadiene-styrene) modified asphalt has been generally recognized in the international road industry. The PG high-temperature grade of SBS-modified asphalt is usually 76. If the high-temperature performance is further improved by increasing the dosage of SBS, it will be economical. Practice has shown that SBS modified asphalt can achieve better results when used on general high-grade roads, but SBS modified asphalt is not competent for areas with severe climate conditions. Foreign high-strength asphalt has excellent high-temperature stability, which is far greater than that of commonly used road modified asphalt. It is suitable for heavy lanes, curves, long and steep road sections in mountainous areas, intersections, bri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K3/06C08K5/00E01C7/18
Inventor 倪富健司晓丽
Owner SOUTHEAST UNIV
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