[1] Zhang Meng, Qian Zhendong,. Effects of freeze-thaw cycles on fracture behaviorof epoxy asphalt concrete [J]. Journal of Southeast University (English Edition), 2017, 33 (1): 96-100. [doi:10.3969/j.issn.1003-7985.2017.01.016]
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Effects of freeze-thaw cycles on fracture behaviorof epoxy asphalt concrete(
)
冻融作用对环氧沥青混凝土抗裂性能的影响
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 33
- Issue:
- 2017 1
- Page:
- 96-100
- Research Field:
- Traffic and Transportation Engineering
- Publishing date:
- 2017-03-30
Info
- Title:
- Effects of freeze-thaw cycles on fracture behaviorof epoxy asphalt concrete
- 冻融作用对环氧沥青混凝土抗裂性能的影响
- Author(s):
- Zhang Meng; Qian Zhendong
- Intelligent Transportation System Research Center, Southeast University, Nanjing 210096, China
- Keywords:
- freeze-thaw cycle; epoxy asphalt concrete; flexural modulus; fracture energy; plane strain fracture toughness
- PACS:
- U443.33
- DOI:
- 10.3969/j.issn.1003-7985.2017.01.016
- Abstract:
- According to the winter temperature of Peking, the freeze-thaw(FT)condition in laboratory was determined. Seven groups of epoxy asphalt concrete(EAC)specimen were exposed to different FT cycles. The flexural modulus and fracture energy(GF)of EAC exposed to different FT cycles were obtained through the 3-point bending test. Meanwhile, the plane strain fracture toughness(KIC)of EAC was obtained through numerical simulation. The results show that the flexural modulus of the FT conditioned EAC samples decreases with the increase of FT cycles. The FT damage of flexural modulus is 60% after 30 FT cycles. Nevertheless, with the increase of FT cycles, the GF and KIC of EAC decrease first and then increase after 15 FT cycles.
- 根据北京市冬季气温调研, 确定室内冻融循环试验周期, 分别对7组环氧沥青混凝土试件进行不同次数的冻融循环, 通过室内三点弯曲试验得到不同冻融循环次数下环氧沥青混凝土的弯曲劲度模量和断裂能, 采用数值模拟方法计算不同冻融循环次数下环氧沥青混凝土的平面应变断裂韧度.研究结果表明:环氧沥青混凝土弯曲劲度模量随冻融循环次数的增加而减小, 冻融循环次数为30次时, 环氧沥青混凝土弯曲劲度模量的冻融损伤量为60%;环氧沥青混凝土断裂能和平面应变断裂韧度随冻融循环次数的增加呈先减小后增大的趋势, 冻融循环为15次时, 环氧沥青混凝土断裂能和平面应变断裂韧度达到最小值.
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Memo
- Memo:
-
Biographies: Zhang Meng(1989—), male, graduate; Qian Zhendong(corresponding author), female, doctor, professor, qianzd@seu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.51378122).
Citation: Zhang Meng, Qian Zhendong. Effects of freeze-thaw cycles on fracture behavior of epoxy asphalt concrete[J].Journal of Southeast University(English Edition), 2017, 33(1):96-100.DOI:10.3969/j.issn.1003-7985.2017.01.016.