Creep Behavior of Epoxy-Based Adhesive Reinforced with Nanoparticles for Bonded-In Timber Connection
Publication: Journal of Materials in Civil Engineering
Volume 24, Issue 7
Abstract
The mechanical properties of adhesive materials change over time, especially when they are subjected to long-term loadings. The significance of this is often overlooked at the design stage. When adhesives are subjected to a constant load, they may deform continuously, depending on temperature, humidity, and cross-link density. This progressive deformation is called creep. It is imperative that reliable accelerated tests be developed to determine the long-term time-dependent performance of adhesives under different environmental conditions. The long-term creep behavior of thixotropic and room temperature cure epoxy-based adhesives reinforced with nano particles were investigated. The adhesives in this investigation are formulated with the target of application for in situ bonding of pultruded rod into timber for the repair and strengthening of timber structures. In this study, two epoxy-based adhesives with added nano particles (silica fume and rubber) were subjected to bending creep tests in accelerated environments. Experimental data showed that the adhesives reinforced with nano rubber particles exhibited less creep deformation than the unreinforced ones.
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Acknowledgments
The work reported in this paper was financially supported by the Ministry of Science, Technology and Innovation of the Malaysian government. The advice and support by Rotafix Ltd. is gratefully acknowledged. The authors wish to thank technical staff in the materials engineering group at the Universiti Teknologi Mara for their assistance and support.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 24 • Issue 7 • July 2012
Pages: 825 - 831
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Apr 3, 2011
Accepted: Dec 14, 2011
Published online: Jun 15, 2012
Published in print: Jul 1, 2012
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