Evaluation index of temperature susceptibility for asphalt

MA Xiang; NI Fu-jian; CHEN Rong-sheng; ZHAN Qian

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MA Xiang, NI Fu-jian, CHEN Rong-sheng, ZHAN Qian. Evaluation index of temperature susceptibility for asphalt[J]. Journal of Traffic and Transportation Engineering, 2008, 8(1): 31-35.

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MA Xiang, NI Fu-jian, CHEN Rong-sheng, ZHAN Qian. Evaluation index of temperature susceptibility for asphalt[J]. Journal of Traffic and Transportation Engineering, 2008, 8(1): 31-35.

MA Xiang, NI Fu-jian, CHEN Rong-sheng, ZHAN Qian. Evaluation index of temperature susceptibility for asphalt[J]. Journal of Traffic and Transportation Engineering, 2008, 8(1): 31-35.

Citation:

MA Xiang, NI Fu-jian, CHEN Rong-sheng, ZHAN Qian. Evaluation index of temperature susceptibility for asphalt[J]. Journal of Traffic and Transportation Engineering, 2008, 8(1): 31-35.

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Evaluation index of temperature susceptibility for asphalt

School of Transportation, Southeast University, Nanjing 210096, Jiangsu, China

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Author Bio:
Ma Xiang(1980-), male, doctoral student, +86-25-83794931, mxfst@sina.com

hen Rong-sheng(1939-), male, professor, +86-25-83793279, crs3911@hotmail.com
Received Date: 2007-06-28
Publish Date: 2008-02-25

Abstract

Abstract

To choose the reasonable evaluation index of temperature susceptibility for asphalt, the penetration indices of asphalt were calculated through the penetrations at 15, 25 and 30 ℃ and the penetration and softening point at 25 ℃ respectively, they were applied to evaluate the temperature susceptibilities of two kinds of common asphalts and three kinds of polymer modified asphalts(PMA), the dynamic complex viscosities of the asphalts under different temperature conditions were tested by using dynamic shear rheometer, and their relationships between viscosity and temperature were analyzed. Analysis result shows that there are linear correlations between viscosity and temperature for normal bitumens within 15~60 ℃, their temperature susceptibilities are a constant, while the relationships of viscosity and temperature for PMA satisfy WLF equation, their temperature susceptibilities change with temperature. So the temperature susceptibility of common asphalt may be expressed by using penetration index, but temperature condition must be appointed to estimate the temperature susceptibility of PMA.
- pavement engineering,
- asphalt,
- WLF equation,
- temperature susceptibility,
- penetration index,
- complex viscosity

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