Aging behaviors of nanoscale mechanical properties of asphalt phases

WANG Ming; LIU Li-ping

doi:10.19818/j.cnki.1671-1637.2019.06.001

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WANG Ming, LIU Li-ping. Aging behaviors of nanoscale mechanical properties of asphalt phases[J]. Journal of Traffic and Transportation Engineering, 2019, 19(6): 1-13. doi: 10.19818/j.cnki.1671-1637.2019.06.001

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WANG Ming, LIU Li-ping. Aging behaviors of nanoscale mechanical properties of asphalt phases[J]. Journal of Traffic and Transportation Engineering, 2019, 19(6): 1-13. doi: 10.19818/j.cnki.1671-1637.2019.06.001

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Aging behaviors of nanoscale mechanical properties of asphalt phases

doi: 10.19818/j.cnki.1671-1637.2019.06.001

WANG Ming^1
,,
LIU Li-ping^{2
,
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1.
Airport College, Civil Aviation University of China, Tianjin 300300, China
2.
Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai 201804, China

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Author Bio:
WANG Ming(1987-), female, lecturer, PhD, caucwm@yeah.net

LIU Li-ping(1968-), female, professor, PhD, llp@tongji.edu.cn
Received Date: 2019-05-05
Publish Date: 2019-12-25

Abstract

Abstract

The original, short-term aging and long-term aging base asphalts and SBS modified asphalts were selected as the research objects, the atomic force microscopy with quantitative nano mechanical(QNM) property function mode was used to measure the mechanical properties of the asphalts in nanoscale phases. The software Nano Scope Analysis was applied to quantitatively analyze the mechanical images of asphalt phases. Two indicators such as the phase modulus and adhesion were mostly analyzed. The Halpin-Tsai model in the field of mesoscale mechanics was used to study the composite behaviors of mechanical properties of the asphalts in multiple phases, and the aging behaviors of mechanical properties of the asphalt phases in nanoscale were investigated. Analysis result shows that the nanoscale moduli of bee phase and base phase in the base asphalt are concentrated at 600.0 and 18.3 MPa, respectively, and the corresponding nanoscale adhesion are concentrated at 10.3 and 18.6 nN, respectively. The nanoscale moduli of bee phase and base phase in the SBS modified asphalt are concentrated at 899 and 35 MPa, respectively, and the corresponding nanoscale adhesion are concentrated at 30.2 and 38.4 nN, respectively. For the base asphalt, the composite moduli of original, short-term aging and long-term aging asphalts are 111, 138, and 187 MPa, respectively, and the composite adhesion are 16.7, 14.3, and 4.2 nN, respectively. For the SBS modified asphalt, the composite moduli of original, short-term aging and long-term aging asphalts are 158, 313, and 547 MPa, respectively, and the composite adhesion are 32.2, 35.0, and 15.8 nN, respectively. In the nanoscale phase structure of asphalt, the bee phase has a high modulus and a low adhesion, while the base phase has a low modulus and a high adhesion. The phase modulus and adhesion of SBS modified asphalt are significantly higher than that of base asphalt. As the aging degree increases, the mechanical properties of asphalt phases change, and the aging behaviors of different phases vary significantly. Therefore, the QNM technology can effectively identify the nanoscale mechanical properties of asphalt phases, and the Halpin-Tsai model can be used to quantify the composite behaviors of mechanical properties of asphalt phases.
- pavement material,
- asphalt,
- nanoscale phase,
- mechanical property of phase,
- aging behavior,
- Halpin-Tsai model

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References(34)

References

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Aging behaviors of nanoscale mechanical properties of asphalt phases

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