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Asphalt cement doped with surface treated basalt fiber and crumb rubber

A technology of basalt fiber and waste tire rubber powder, applied in the field of asphalt cement, can solve the problems of reducing the service life of asphalt pavement, affecting driving quality and traffic safety, achieving good anti-rutting and anti-cracking performance, and improving high and low temperature stability and bonding performance, performance-enhancing effects

Inactive Publication Date: 2015-08-26
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the high temperature area in southern summer, road sections with large traffic volume and heavy load vehicles are very prone to rutting, seriously affecting driving quality and traffic safety, and reducing the service life of asphalt pavement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 82.7 parts by mass of base asphalt, 16.4 parts by mass of waste tire rubber powder treated with a coupling agent, and 0.9 parts by mass of basalt fiber treated with a coupling agent were used to prepare an asphalt binder. The performance test of the prepared asphalt binder was carried out, and the ductility of the asphalt binder at 5°C was measured to be 20.3cm, the softening point was 87.4°C, the penetration value at 25°C was 42.3 (unit: 0.1mm), and the elastic recovery was 82%, PG classification is PG88-28 (dynamic shear rheological test failure temperature is 89.4°C, low temperature bending beam rheological test failure temperature is -28°C), viscosity at 60°C is 1780 Pa s, viscosity at 135°C is 2.68 Pa·s, all indicators meet the aforementioned requirements.

Embodiment 2

[0023] 84.5 parts by mass of base asphalt, 14.7 parts by mass of waste tire rubber powder treated with a coupling agent and 0.8 parts by mass of basalt fiber treated with a coupling agent were used to prepare an asphalt binder. The performance test of the prepared asphalt binder was carried out, and the ductility of the asphalt binder at 5°C was measured to be 18.4cm, the softening point was 84.5°C, the penetration value at 25°C was 45.7 (unit: 0.1mm), and the elastic recovery was 79%, PG classification is PG88-28 (dynamic shear rheological test failure temperature is 88.5°C, low temperature bending beam rheological test failure temperature is -28°C), viscosity at 60°C is 1420 Pa s, viscosity at 135°C is 2.31 Pa·s, all indicators meet the aforementioned requirements.

Embodiment 3

[0025] 86.3 parts by mass of base asphalt, 13.1 parts by mass of waste tire rubber powder treated with a coupling agent, and 0.6 parts by mass of basalt fiber treated with a coupling agent were used to prepare an asphalt binder. The performance test of the prepared asphalt binder was carried out, and the measured ductility of the asphalt binder at 5°C was 16.2cm, the softening point was 82.3°C, the penetration value at 25°C was 47.4 (unit: 0.1mm), and the elastic recovery was 72%, PG classification is PG82-22 (dynamic shear rheological test failure temperature is 84.2°C, low temperature bending beam rheological test failure temperature is -22°C), viscosity at 60°C is 1320 Pa s, viscosity at 135°C is 2.12 Pa·s, all indicators meet the aforementioned requirements.

[0026] The enumerated embodiments of the present invention are selected according to the upper, middle and lower limits of each component, all of which can meet the claims of the present invention, and have superior ...

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Abstract

The invention discloses asphalt cement doped with surface treated basalt fiber and crumb rubber. The asphalt cement comprises the components in parts by mass as follows: 82.7-86.3 parts of matrix asphalt, 13.1-16.4 parts of the surface treated crumb rubber and 0.6-0.9 parts of the surface treated basalt fiber, and the mass sum of the components is 100, wherein a coupling agent solution is adopted for surface treatment of the basalt fiber and the crumb rubber, and the composition ratio of a coupling agent to water to ethanol for the coupling agent solution is 1:(3-6):(10-20). The asphalt cement is mainly applied to an asphalt pavement in an area with high temperature in summer, and can improve the anti-rutting capacity and anti-cracking capacity of the asphalt pavement effectively, reduce the maintenance cost of the asphalt pavement and prolong the service life of the asphalt pavement.

Description

technical field [0001] The invention belongs to the technical field of road engineering and relates to an asphalt binder mixed with surface-treated basalt fiber and waste tire rubber powder. Background technique [0002] Asphalt pavement has been widely used because of its good driving comfort and superior performance. More than 90% of expressways, first-class highways and urban roads use asphalt pavement. However, with the rapid development of social economy, the ever-increasing flow of heavy-duty vehicles in road transportation has seriously affected the service life of asphalt pavement. Therefore, the performance requirements for asphalt pavement are also increasing, and the research and development of high-performance asphalt binder has become an important development direction of road construction. [0003] Asphalt mixture is a typical thermorheological material, and its mechanical properties are highly sensitive to temperature, loading time and load magnitude. In the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08K9/00C08K7/10
Inventor 刘朝晖柳力李盛曹前向宇陈善祥刘靖宇颜燕舞黄屿许庆祥
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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