Wide temperature range modified asphalt for roads and preparation method thereof

A modified asphalt, wide temperature range technology, used in building insulation materials, building components, buildings, etc., can solve problems such as high temperature above 40 °C, and lower than 0 °C at night, road quality degradation, and unstable quality. , to achieve the effect of extending the elastic and plastic range, saving cost and investment, and simple preparation method

Active Publication Date: 2012-11-07
甘肃交通规划勘察设计院有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For areas with large temperature differences, such as the Gobi area in Hexi, Gansu, the daytime temperature is as high as 40°C in summer, and it will drop below 0°C at night, while the road surface temperature will be as high as 70°C during the day, and the low temperature in winter can reach -30°C. Defects such as rutting and cracks will quickly occur on permanent asphalt, resulting in a decrease in road quality and a shortened service life. If the amount of modifier is increased blindly, it will lead to a decrease in asphalt construction performance and unstable quality.
[0003] The patent application number 201010522786.5 mentions that styrene-butadiene rubber and polyethylene wax are used as raw materials to prepare wide temperature range modified asphalt. Although it is introduced that its 5°C ductility is greater than 150cm, the addition of polyethylene wax makes the modified asphalt brittle. rise, but degrades the low-temperature performance

Method used

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  • Wide temperature range modified asphalt for roads and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] Example 1 A wide temperature range modified asphalt for roads, which is composed of the following components by weight (kg / kg): 80 parts of base asphalt, 1 part of SBS modifier, 30 parts of activated waste tire rubber powder, 6 parts of light oil part, 0.5 part of terpene resin, and 0.1 part of elemental sulfur.

[0021] Among them: base asphalt refers to No. 90 ordinary road petroleum asphalt.

[0022] The SBS modifier is star SBS.

[0023] Activated waste tire rubber powder refers to the car inner tire powder obtained by activating the fine rubber powder of the inner tire of the car, and its activation rate is 45%.

[0024] Light oils are aromatic oils.

[0025] The preparation method of the wide temperature range modified asphalt for roads refers to: firstly weigh in proportion, then heat the base asphalt to 160°C, add SBS modifier, activated waste tire rubber powder, light oil in sequence, and Stir at a speed of 200 rpm for 1 hour to raise the temperature to ...

Embodiment 2

[0026] Example 2 A wide temperature range modified asphalt for roads, which is composed of the following components by weight (kg / kg): 85 parts of base asphalt, 2 parts of SBS modifier, 20 parts of activated waste tire rubber powder, 4 parts of light oil part, 0.3 part of terpene resin, and 0.2 part of elemental sulfur.

[0027] Among them: base asphalt refers to No. 110 ordinary road petroleum asphalt.

[0028] The SBS modifier is linear SBS.

[0029] The activated waste tire rubber powder refers to the car inner tire powder obtained by activating the fine rubber powder of the inner tire of the car, and its activation rate is 65%.

[0030] Light oil is heat transfer oil.

[0031] The preparation method of the wide temperature range modified asphalt for roads refers to: firstly weigh in proportion, then heat the base asphalt to 180°C, add SBS modifier, activated waste tire rubber powder, light oil in sequence, and Stir at a speed of 500 rpm for 1 hour to raise the temp...

Embodiment 3

[0032] Example 3 A wide temperature range modified asphalt for roads, which consists of the following components by weight (kg / kg): 90 parts of base asphalt, 5 parts of SBS modifier, 10 parts of activated waste tire rubber powder, 2 parts of light oil part, 0.1 part of terpene resin, and 0.5 part of elemental sulfur.

[0033] Among them: base asphalt refers to No. 90 ordinary road petroleum asphalt.

[0034] The SBS modifier is star SBS.

[0035] The activated waste tire rubber powder refers to the car inner tire powder obtained by activating the fine rubber powder of the inner tire of the car, and its activation rate is 55%.

[0036] Light oils are drawn oils.

[0037] The preparation method of the wide temperature range modified asphalt for roads refers to: firstly weigh in proportion, then heat the base asphalt to 170°C, add SBS modifier, activated waste tire rubber powder, light oil in sequence, and Stir at a speed of 350 rpm for 1 hour to raise the temperature to ...

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Abstract

The invention relates to wide temperature range modified asphalt for roads. The asphalt is composed of, by weight, 80-90 parts of matrix asphalt, 1-6 parts of SBS (styrene-butadiene-styrene) modifier, 10-30 parts of activated waste tire rubber powder, 2-6 parts of light oil, 0.1-0.5 part of terpene resin and 0.1-0.5 part of elemental sulfur. The wide temperature range modified asphalt for the roads has good performances of being free of flowing at high temperature and being free of cracking at low temperature, usage temperature range can reach higher than 100 DEG C, the preparation method is simple, and production can be directly performed on original SBS modifier production devices, so that cost investment of production equipment is reduced.

Description

technical field [0001] The invention relates to a modified asphalt and a preparation method thereof, in particular to a wide temperature range modified asphalt for roads and a preparation method thereof. Background technique [0002] Asphalt is a kind of viscoelastic material, which is widely used in the paving of road surface. It has many advantages such as comfortable driving, easy repair and long service life. However, the temperature range of ordinary road petroleum asphalt is narrow, and flow deformation occurs at high temperature, which leads to road rutting, and cracks are easy to occur at low temperature, so modified asphalt appears as a new pavement material, which solves the above problems well. However, under normal circumstances, the operating temperature range of modified asphalt is only about 80°C. For example, the commonly used PG64-22 has a temperature operating range of 86°C. For areas with large temperature differences, such as the Gobi area in Hexi, Gansu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08L21/00C08L45/00C08K3/06
Inventor 李晓民赵璠新魏定邦冯中良张兴军
Owner 甘肃交通规划勘察设计院有限责任公司
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