Feasibility of externally activated self-repairing concrete with epoxy injection network and Cu-Al-Mn superelastic alloy reinforcing bars
| Autor: | Sanjay Pareek, Yusuke Suzuki, Ryosuke Kainuma, Toshihiro Omori, Kshitij C. Shrestha, Yoshikazu Araki |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Alloy Shape-memory alloy Epoxy engineering.material Condensed Matter Physics Casting Atomic and Molecular Physics and Optics Brittleness Mechanics of Materials Reinforced solid visual_art Signal Processing engineering visual_art.visual_art_medium General Materials Science Electrical and Electronic Engineering Composite material Deformation (engineering) Beam (structure) Civil and Structural Engineering |
| Zdroj: | Smart Materials and Structures. 23:105027 |
| ISSN: | 1361-665X 0964-1726 |
| Popis: | This paper studies the effectiveness of an externally activated self-repairing technique for concrete members with epoxy injection network and Cu-Al-Mn superelastic alloy (SEA) reinforcing bars (rebars). Compared to existing crack self-repairing and self-healing techniques, the epoxy injection network has the following strengths: (1) Different from the self-repairing methods using brittle containers or tubes for adhesives, the proposed self-repair process can be performed repeatedly and is feasible for onsite concrete casting. (2) Different from the autogenic self-healing techniques, full strength recovery can be achieved in a shorter time period without the necessity of water. This paper attempts to enhance the self-repairing capability of the epoxy injection network by reducing residual cracks by using cost-effective Cu-based SEA bars. The effectiveness of the present technique is examined using concrete beam specimens reinforced by 3 types of bars. The first specimen is reinforced by steel deformed bars, the second by steel threaded bars, and finally by SEA threaded rebars. The tests were performed with a 3 point cyclic loading with increasing amplitude. From the test results, effective self-repairing was confirmed for small deformation levels irrespective of the reinforcement types. Effective self-repairing was observed in the SEA reinforced specimen even under much larger deformations. Nonlinear finite element analysis was performed to confirm the experimental findings. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|