Asphalt viscosity and asphalt mixture pavement performance under vibration

RONG Hong-liu; NING Zhi-kang; LI Zheng-hua; YANG Xiao-long; MENG Yong-jun

doi:10.19818/j.cnki.1671-1637.2023.02.008

Volume 23 Issue 2

Apr. 2023

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RONG Hong-liu, NING Zhi-kang, LI Zheng-hua, YANG Xiao-long, MENG Yong-jun. Asphalt viscosity and asphalt mixture pavement performance under vibration[J]. Journal of Traffic and Transportation Engineering, 2023, 23(2): 116-125. doi: 10.19818/j.cnki.1671-1637.2023.02.008

Citation:

RONG Hong-liu, NING Zhi-kang, LI Zheng-hua, YANG Xiao-long, MENG Yong-jun. Asphalt viscosity and asphalt mixture pavement performance under vibration[J]. Journal of Traffic and Transportation Engineering, 2023, 23(2): 116-125. doi: 10.19818/j.cnki.1671-1637.2023.02.008

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Asphalt viscosity and asphalt mixture pavement performance under vibration

doi: 10.19818/j.cnki.1671-1637.2023.02.008

1.
School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, Guangxi, China
2.
Guangxi Special Geological Highway Safety Engineering Technology Research Center, Guangxi University, Nanning 530004, Guangxi, China
3.
Guangxi Communications Design Group Co., Ltd., Nanning 530029, Guangxi, China

Funds:

National Natural Science Foundation of China 51968006

Natural Science Foundation of Guangxi 2021JJA160140

More Information

Author Bio:
RONG Hong-liu(1972-), male, senior engineer, PhD, 19940051@gxu.edu.cn

MENG Yong-jun(1981-), male, professor, PhD, hitmengyj@163.com
Received Date: 2022-10-10
Available Online: 2023-05-09
Publish Date: 2023-04-25

Abstract

Abstract

To reduce the vast energy consumption and exhaust emissions during the construction of asphalt mixture, a vibration function was added to the traditional mixing technology to reduce the temperature required for the mixing process. The effects of vibration parameters (vibration frequency and amplitude) and test temperature on the viscosity reduction for the SBS modified asphalt were investigated by the Brockfield rotational viscosity test. The basic performance indicators (penetration, softening point, and ductility) of the asphalt were tested to reveal the effects of two vibration methods on the basic performance of SBS modified asphalt. Based on the standard, high-temperature and heavy load rutting tests, water immersion Marshall stability test, and freeze-thaw splitting test, the effects of vibratory mixing on the high-temperature stability and water stability of SBS modified asphalt mixture were investigated separately. Test results show that the vibratory mixing can significantly reduce the viscosity of SBS modified asphalt, improve the mobility of the asphalt. With the increase in the vibration parameters, the viscosity reduction effect of modified asphalt is better, and the maximum viscosity reduction rate is up to 14%. The viscosity reduction by vibration can be equivalent to the temperature viscosity reduction, and the temperature equivalent effect brought by the vibration effect is more significant with the increase in temperature. After the vibratory mixing, the viscosity property of SBS modified asphalt can be recovered, and hence, no negative impact is exerted on its basic performance. When the vibration frequency is less than 40 Hz, the dynamic stability, residual stability, and tensile strength ratio of SBS modified asphalt mixture increase with the rise in the vibration frequency. It is indicated that the vibratory mixing can improve the high-temperature stability and water stability of asphalt mixture. However, when the vibration frequency is 50 Hz, the pavement performance of asphalt mixture is consistent with that at 30 Hz. In other words, the effect of vibration frequency increase on the pavement performance of asphalt mixture is limited.
- pavement engineering,
- asphalt mixture,
- vibratory mixing,
- viscosity reduction by vibration,
- high-temperature stability,
- water stability

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References

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Asphalt viscosity and asphalt mixture pavement performance under vibration

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