Research on Real-Time Monitoring of Strain Behavior of Concrete under Freezing-Thawing Cycle by White Light Interferometer

Author:

Lv Haifeng1,Kong Xianglong2,Ren Jie3,Zhao Xuefeng4ORCID,Sun Changsen5

Affiliation:

1. Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, China

2. Suzhou Nuclear Power Research Institute, Suzhou 215004, China

3. Construction Project Quality Safety Technology Service Center, Ordos Municipal Bureau of Housing and Urban-Rural of Development, Ordos 017010, China

4. School of Civil Engineering, State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China

5. College of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, China

Abstract

To study the degenerative process of concrete subjected to freezing-thawing (F-T) cycles in real-time, the strain behavior of concrete cylinder was monitored by a fiber optic F-T testing method based on the white light interferometer (WLI) technique. The principle of the WLI technique was described in detail and the design of the fiber optic testing method. Two mixed proportions of concrete immersed in 3.5% NaCl solution were tested in a freeze-thaw testing machine. The theory and method of temperature compensation were stated in detail. The results indicated that the variation of strain decreases in the cooling stage and increases in the heating stage in a F-T cycle. The residual strain was generated in the test.

Funder

Natural Science Foundation of Shandong Province

Publisher

Hindawi Limited

Subject

General Engineering,General Materials Science

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