Experimental Investigation of the Relationship between Dynamic Characteristics and Mechanical Properties of Fly Ash-Based Geopolymer Reinforced Concrete Beams
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 8
Abstract
This manuscript presents an experimental investigation of fly ash-based geopolymer-reinforced concrete beams’ dynamic characteristics and mechanical properties. The purpose of this study is to compare the performance of geopolymer and portland cement concrete in terms of the viscous damping ratio, resonance frequency, compressive strength, and modulus of elasticity. The scope of the effort includes fabricating 14 reinforced concrete beams, 12 of which were made with geopolymer concrete and 2 with portland cement concrete. In this study, the experimental modal analysis method was employed. Test beams were placed on polyurethane cube supports to achieve free-free mode or oscillation conditions. For data analysis, 44 equally spaced analysis points were determined on the beams. Some of these points were stimulated five times along the axis using a modal hammer to obtain FRF and viscous damping ratio graphs. As a result, the resonance frequency of portland cement concrete was higher than that of geopolymer concretes, while the viscous damping rate was lower. Furthermore, it was determined that the modulus of elasticity changed inversely with the viscous damping ratio rather than the compressive strength when examining the relationship between modal parameters and mechanical properties. These findings have significant implications for using geopolymer concrete in construction, as it can help distribute loads homogeneously and increase the durability of structures. Overall, this study provides valuable insights into the relationship between dynamic characteristics and mechanical properties of geopolymer and portland cement concrete, informing the development of more sustainable and resilient construction materials.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was supported by TUBITAK (The Scientific and Technological Research Council of Turkey) under Grant No. 121M236. We want to thank Bekir Aktaş, Ferhat Çeçen, and the researchers involved in the project for their contributions to the study.
Author contributions: Ahmet Özbayrak wrote the main text, prepared figures, and reviewed the manuscript.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 8 • August 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Aug 15, 2023
Accepted: Feb 5, 2024
Published online: Jun 4, 2024
Published in print: Aug 1, 2024
Discussion open until: Nov 4, 2024
ASCE Technical Topics:
- Beams
- Cement
- Concrete
- Concrete beams
- Continuum mechanics
- Damping
- Dynamics (solid mechanics)
- Engineering materials (by type)
- Engineering mechanics
- Materials engineering
- Polymer
- Portland cement
- Reinforced concrete
- Solid mechanics
- Structural dynamics
- Structural engineering
- Structural members
- Structural systems
- Synthetic materials
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