Effect of Shape Memory on the Mechanical Properties of Concrete Reinforced with Short Shape Memory Alloy Fibers
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 12
Abstract
To enhance the mechanical properties of concrete and inhibit the development of cracks, this study designed and prepared four kinds of shape memory alloy fiber–reinforced concrete (SMAFRC) with different volume contents (0%, 0.3%, 0.6%, and 0.9%), and carried out cube compression, splitting tensile, and bending tests at two temperatures (20°C and 100°C). The SMAFRC failure samples were analyzed by scanning electron microscopy (SEM) and the failure mechanism was explored. The results showed that the SMAFRC specimen with 0.9% SMA fiber content (S-0.9) had the best mechanical properties at 20°C, and the cube compressive strength, splitting tensile strength, and bending strength were increased by 18.22%, 32.34%, and 33.20%, respectively, compared with the pure specimen (S-0). At 100°C, the strength of concrete decreased compared with that at 20°C and the SMAFRC sample with an SMA fiber content of 0.6% (S-0.6) decreased slightly at 100°C, indicating stable mechanical properties. SEM shows that the presence of SMA fibers not only acts as a bridge in concrete, but also blocks the generation and development of microcracks.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors gratefully acknowledge the financial support of the Building Science Institute of Inner Mongolia University of Science and Technology Open Foundation Project, Nos. JYSJJ-2021Q07 and JYSJJ-2021Q08; the Fundamental Research Funds for Inner Mongolia University of Science & Technology; the quality and efficiency improvement project of the civil engineering discipline; the Baotou City Innovation Talent Project; and the Special Funds for “Grassland Talents” Project.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 12 • December 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Sep 14, 2023
Accepted: May 7, 2024
Published online: Oct 3, 2024
Published in print: Dec 1, 2024
Discussion open until: Mar 3, 2025
ASCE Technical Topics:
- Alloys
- Analysis (by type)
- Compressive strength
- Concrete
- Engineering fundamentals
- Engineering materials (by type)
- Engineering mechanics
- Failure analysis
- Fiber reinforced concrete
- Fibers
- Material mechanics
- Material properties
- Materials engineering
- Mechanical properties
- Metals (material)
- Smart materials
- Strength of materials
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