Effects of Mix Proportion and Cyclic Loading on the Stress–Strain Behavior of a Flexible Thin Spray-On Liner under Uniaxial Compression
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 5
Abstract
To investigate the effects of mix proportion on the compressive mechanical properties of a flexible thin spray-on liner (TSL), a series of compression tests were performed on flexible TSL specimens with different styrene-acrylic emulsion contents (), cement–sand ratios (), and fiberglass contents (). With an increase in , the compressive strength of the flexible TSL first increased and then decreased, and the TSL gradually transformed from brittle to ductile. With an increase in , the compressive strength increased. The increase of improved the compressive strength and elastic modulus of the TSL. Subsequently, three cyclic loading paths were selected to study the stress–strain behavior of a flexible TSL with a fixed mix proportion. The evolution characteristics of the irreversible axial strain, elastic modulus, dissipated energy, and damage variables under different cyclic loading paths were analyzed. The development of irreversible deformation accumulation reflects the characteristics of the damage evolution process under cyclic loading. Based on the experimental results, a stress–strain model is proposed to predict the stress–strain behavior of the TSL under different cyclic loading paths. The experimental results were used to calibrate and validate this model, demonstrating that the model can effectively predict the stress–strain behavior of a flexible TSL.
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Data Availability Statement
The statistical analysis methods and data that support the findings of this study are available from the corresponding author by request.
Acknowledgments
This research was funded by the National Key Research and Development Program of China (No. 2021YFC2902103), the Natural Science Foundation of Shandong Province (Grant nos. ZR2021ZD36 and ZR2021QE127), and the National Natural Science Foundation of China (Grant no. 52108373).
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Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 5 • May 2024
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© 2024 American Society of Civil Engineers.
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Received: Apr 29, 2023
Accepted: Oct 6, 2023
Published online: Feb 20, 2024
Published in print: May 1, 2024
Discussion open until: Jul 20, 2024
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