Tensile Strength Improvement of Concrete Slabs Using Polyurea Spray
Publication: Practice Periodical on Structural Design and Construction
Volume 26, Issue 1
Abstract
Ductility is a desirable trait in an otherwise brittle concrete which is conventionally achieved via methods like introduction of steel reinforcement. While thin spray-on liner (TSL) is a material used in underground support systems to enhance the strength and ductility of rock and shotcrete, its application in concrete is a promising prospect. The study in this paper was conducted to observe the effect of application of Polyurea TSL on the flexural properties of unreinforced and lightly reinforced concrete slabs of varying strengths applied with varying thicknesses of Polyurea. The study used three-point flexural tests on slabs of uniform dimensions, simply supported on all sides, until failure or limit of test setup. Deflection was measured underneath the slab midpoint via a linear displacement sensor. Comparative analysis indicated that for the same strength and steel reinforcement, Polyurea application was significantly associated with an increase in stiffness, peak load, yield load, ductility, and energy dissipation in the specimens. Increasing Polyurea thickness also produced the same trend in the observed parameters.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The researchers would like to extend acknowledgement of invaluable support and input for this study to Banu Mukhtar Contracting and Products (Pvt.) Ltd., Pakistan; Kansai Paint, Pakistan; and Building Research Station Lahore—Government of the Punjab, Pakistan.
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Information & Authors
Information
Published In
Practice Periodical on Structural Design and Construction
Volume 26 • Issue 1 • February 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Mar 25, 2020
Accepted: Jul 16, 2020
Published online: Sep 28, 2020
Published in print: Feb 1, 2021
Discussion open until: Feb 28, 2021
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