Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 86, Number 5, June10 2023 , pages 663-671 DOI: https://doi.org/10.12989/sem.2023.86.5.663 |
|
|
|
Experimental study on damage and debonding of the frozen soil-concrete interface under freeze-thaw cycles |
||
Liyun Tang, Yang Du, Liujun Yang, Xin Wang, Long Jin and Miaomiao Bai
|
||
| Abstract | ||
| Freeze-thaw cycles induce strength loss at the frozen soil-concrete interface and deterioration of bonding, which causes construction engineering problems. To clarify the deterioration characteristics of the interface under the freeze-thaw cycle, a frozen soil-concrete sample was used as the research object, an interface scanning electron microscope test under the freeze-thaw cycle was carried out to identify the micro index information, and an interface shear test was carried out to explore the loss law of interface shear strength under the freeze-thaw cycle. The results showed that the integrity of the interface was destroyed, and the pore number and pore size of the interface increased significantly with the number of freeze-thaw cycles. The connection form gradually deteriorates from surface-to-surface contact to point-to-surface contact and point-to-point contact, and the interfacial shear strength decreases the most at 0-3 freeze-thaw cycles, with small decreases from to 3-8 cycles. After 12 freeze-thaw cycles, the interfacial shear strength tends to be stable, and shear the failure occurs internally in the soil. | ||
| Key Words | ||
| damage characteristics; freeze-thaw cycle; interface; mechanical properties; microscopic characteristics | ||
| Address | ||
| Liyun Tang, Yang Du: Architecture and Civil Engineering School, Xi'an University of Science and Technology, Xi'an 710054, China Liujun Yang, Xin Wang: School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China Long Jin: CCCC First Highway Consultants Co. Ltd., Shaanxi, Xi'an 710000, China Miaomiao Bai: Architecture and Civil Engineering School, Xi'an University of Science and Technology, Xi'an 710054, China | ||