[1] Chen Xianhua, Li Weinong, Li Hongtao,. Evaluation of fracture properties of epoxy asphalt mixturesby SCB test [J]. Journal of Southeast University (English Edition), 2009, 25 (4): 527-530. [doi:10.3969/j.issn.1003-7985.2009.04.023]
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Evaluation of fracture properties of epoxy asphalt mixturesby SCB test(
)
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 25
- Issue:
- 2009 4
- Page:
- 527-530
- Research Field:
- Traffic and Transportation Engineering
- Publishing date:
- 2009-12-30
Info
- Title:
- Evaluation of fracture properties of epoxy asphalt mixturesby SCB test
- Author(s):
- Chen Xianhua1; Li Weinong1; Li Hongtao2
-
1School of Transportation, Southeast University, Nanjing 210096, China
2 Jiangsu Construction Headquarters of Yangtze River Bridges, Nanjing 210010, China
- PACS:
- U443.33
- DOI:
- 10.3969/j.issn.1003-7985.2009.04.023
- Abstract:
- The fracture properties of epoxy asphalt mixtures(EAM)are evaluated based on J-integral and ultimate strength. Totally 60 semi-circular bending(SCB)specimens cored from superpave gyratory compactor(SGC)with three groups of notch depths are tested at the temperature of -10 and 20 ℃. The experimental results reveal good repeatability in EAM characterization. The tensile strength ratio of SCB to the indirect tensile test(IDT)is at a range of 1.4 to 1.7, and the ultimate strength of EAM is exponentially dependent on the notch depths. At the test temperatures, the critical J-integral value of EAM is much higher than that of hot mix asphalt(HMA)with thermo-plastic asphalt binder. The response mode of EAM changes from ductile mode to brittle mode and the fracture energy increases 30% when temperature decreases from 20 to -10 ℃, while its critical J-integral value decreases only 15%. It is concluded that EAM has better fracture resistance than thermo-plastic HMA; more fracture energy is needed to initiate cracks in EAM at low temperature, and the cracks propagate more rapidly than at room temperature.
References:
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Memo
- Memo:
-
Biography: Chen Xianhua(1976—), male, doctor, lecturer, chenxh@seu.edu.cn.
Foundation items: Specialized Research Fund for the Doctoral Program of Higher Education(No.20070286009), the Preresearch Project of the National Natural Science Foundation of Southeast University(No.KJ2009388).
Citation: Chen Xianhua, Li Weinong, Li Hongtao. Evaluation of fracture properties of epoxy asphalt mixtures by SCB test[J]. Journal of Southeast University(English Edition), 2009, 25(4): 527-530.