Experimental Investigation of Bond-Slip Performance of Reinforcement in Two Green Concretes
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 3
Abstract
Application of green cement to replace ordinary portland cement (OPC) for concrete structures has become an active research interest. Using pull-out tests, this study explored the bond behavior of embedded rebar confined by concretes made with two kinds of no-cement binders: (1) a hydraulic binder consisting of a ternary mixture of ground granulated blast furnace slag, low calcium fly ash, and circulating fluidized bed combustion (CFBC) fly ash, which is known as slag-fly ash-CFBC (or SFC) binder; and (2) an alkali-activated slag (AAS) binder. The experimental results showed that, at equivalent grades of 28-day compressive strength, the bond strength of the embedded rebar confined by concrete made with the SFC binder ranked the best, followed by OPC binder in the second place, and the AAS binder in the third place. Analysis of bond quality showed the satisfactory compatibility between the reinforcing bars and the confined green concretes, highlighting their high potential for successful application to the practical construction of infrastructure.
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Acknowledgments
The authors would like to acknowledge financial aid for this investigation from the National Taiwan University of Science and Technology (NTUST) (Taiwan Tech) and the Ministry of Science and Technology, Taiwan, through research Grant No. 103-2221-E-011-078-MY3 and the National Foundation for Science and Technology Development (NAFOSTED), Vietnam, through research Grant No. 107.99-2018.301.
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 3 • March 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: Sep 29, 2018
Accepted: Jul 22, 2019
Published online: Jan 10, 2020
Published in print: Mar 1, 2020
Discussion open until: Jun 10, 2020
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