Effect of Recycled Acrylic-Based Polymers on Bond Stress-Slip Behavior in Reinforced Concrete Structures
Publication: Journal of Materials in Civil Engineering
Volume 29, Issue 1
Abstract
Limited studies investigated the effect of recycled polymers obtained from the paint industry on concrete bond stress-slip with embedded steel bars, including whether such behavior would be similar to that imparted by virgin polymeric latexes. Around 50 concrete mixtures containing different vinyl acrylic-based polymer concentrations are tested by direct bond and beam-end methods. Test results have shown that the concrete-bar interfacial bond stresses occurring in the elastic region substantially improved with recycled and virgin polymers. At a similar polymer-to-cement ratio, concrete incorporating recycled polymers exhibited improved bond properties than mixtures prepared with virgin ones. This was indirectly related to the pigment and extender powders in the waste latex paints, thus reducing porosity and improving denseness of cement paste that strengthen the transition zone adjacent to reinforcing bars. The effect of reducing the water-to-cement ratio while adding superplasticizer to compensate the loss in workability and compressive strength was found efficient to increase the ultimate bond strength.
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Acknowledgments
This project was funded by the School of Engineering Research Council of the Lebanese American University (LAU), Byblos, Lebanon. The authors wish to acknowledge the experimental support provided by the Laboratory of the Civil Engineering Department at LAU including the contributions of the undergraduate research assistants Hratch Agopian and Yorguo El-Hachem.
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Published In
Journal of Materials in Civil Engineering
Volume 29 • Issue 1 • January 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Feb 25, 2016
Accepted: May 26, 2016
Published online: Jul 21, 2016
Discussion open until: Dec 21, 2016
Published in print: Jan 1, 2017
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