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Modified asphalt and its preparation method

A technology for modifying asphalt and asphalt, applied in building components, building insulation materials, buildings, etc., can solve the problems affecting the use effect and low-temperature ductility effect of modified asphalt, affecting the effect of asphalt modification, and huge one-time investment, etc. Achieving the effect of ideal product quality index, non-toxic flash point and reasonable process

Inactive Publication Date: 2003-04-30
大连市政设施管修处
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Problems solved by technology

This means that SBS is not completely dissolved, which will affect the use effect of modified asphalt and the effect of low temperature ductility
[0004] The dispersing effect of the above-mentioned mechanical method is affirmative, but still shows the following deficiencies: (1) the one-time investment of its equipment is huge, and a full set of modified asphalt equipment needs about 8-11 million yuan, and domestic similar products also need about 4 million; (2) ) need to be equipped with high-demand auxiliary power equipment, only one grinder power is 160KW, using this equipment to process modified asphalt, the equipment consumes a lot of energy; (3) Although under the strong shear force, SBS is Grind into tiny particles, but because SBS is not completely dissolved in asphalt, a part of SBS may be separated from asphalt at high temperature, which will inevitably affect the effect of asphalt modification

Method used

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  • Modified asphalt and its preparation method
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Effect test

example ( 1

[0033]The process of preparing modified asphalt: first heat the di-refined furfural extract oil at 260-560°C to 160°C and mix it with the same amount of thermoplastic elastomer SBS, the ratio between them is 1:1. Stir at the same temperature for 35 minutes to form a viscous solution, which is called homogeneous system A. The asphalt is heated to 160°C, mixed with 10% homogeneous system A and 90% road asphalt, and stirred rapidly for 5 minutes to prepare modified asphalt.

[0034] The physical index test results of modified asphalt are shown in Table 1.

example ( 2

[0036] The process of preparing modified asphalt: first heat the di-refined furfural extract oil at 260-560℃ to 160℃, ℃, and mix it with the same amount of SBS, the ratio of them is 1:1. Stir at the same temperature for 35 minutes to form a viscous solution called homogeneous system A. Heat the asphalt to 160°C, mix 8% homogeneous system A with 92% road asphalt, and stir quickly for 5 minutes to prepare modified asphalt.

[0037] The physical index test results of modified asphalt are shown in Table 1.

example ( 3

[0039] The process of preparing modified asphalt: first heat the di-refined furfural extract oil at 260-560°C to 170°C and mix it with the same amount of thermoplastic elastomer SBS, the ratio between them is 40:60. Stir at the same temperature for 35 minutes to form a viscous solution, which is called homogeneous system A. Heat the asphalt to 160°C, mix 15% homogeneous system A with 85% road asphalt, and stir quickly for 5 minutes to prepare modified asphalt.

[0040] The physical index test results of modified asphalt are shown in Table 1.

[0041] experimental project

[0042] It can be seen from Table 1 that there are the following characteristics: (1) Compared with the grinding method, the pretreatment method has a ductility at 5°C that is about twice that of the grinding method; the ductility at 0°C is 19.6-32 times that of the grinding method . (2) Softening point and penetration, the two methods are basically similar. The equivalent brittle point T1.2 pretreatme...

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Abstract

A modified asphalt is prepared through preparing the homogeneous body from cosolvent, refined furfural oil, and thermoplastic elastomer SBS, through hot mixing and stirring, and mixing it with the heated asphalt. Its advantages are no coagulation and educing, and low cost.

Description

Technical field [0001] The invention relates to a road covering, especially a composition of asphalt materials. Background technique [0002] The purpose of asphalt modification is to improve the high temperature stability, low temperature crack resistance and aging resistance of asphalt concrete. To this end, many technical workers in the world have conducted a lot of research and road experiments on road cement modified asphalt, and developed many types of modified asphalt. For example, the Japanese patent (Hei 02-169669) "modified asphalt composition" uses asphalt, deasphalted oil, furfural extract oil and SBS copolymer elastomer or SIS (styrene-isoprene-styrene) copolymer elastomer. Hot mix, and then add dibenzylidene sorbitol with two hydroxyl groups in the molecule to make cold-mix modified asphalt, which can be used at low temperature and can reduce smoke and odor. However, the process of using deasphalted oil, vacuum distillation, and furfural extraction is complicated, a...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L95/00
Inventor 陈凯权惠文高曰义
Owner 大连市政设施管修处
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