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Tạp chí quốc tế 2017
Số tạp chí 7(2017) Trang: 32-37
Tạp chí: International Journal of Engineering and Innovative Technology (IJEIT)
Liên kết:

In order to enhance the sustainability in construction, the study on using green cementing binder to replace the cement in ordinary concrete has been increased as a tendency in recent years. Researchers have recently begun using pull-out test to explore the compatibility of reinforced concrete on the basis of bonding behavior of the steel rebar embedded in concrete which was made with no-cement binders. In this study, a new hydraulic binder called SFC binder being composed of the mixture of three ingredients, the ground granulated blast furnace slag (S), low calcium Class F fly ash (F), and circulating fluidized bed combustion fly ash (C, CFBC fly ash). Bonding behavior of three kinds of OPC and SFC specimens with 28-day compressive strengths of 35 MPa, 45 MPa, and 55 MPa, respectively, were studied, where the specimen of OPC was served as the control group.  The relation between the maximum bonding stress and the residual friction which happened at the descending stages after peak of the pull-out test was investigated. The experimental results indicated that the bonding stress was proportional to residual friction in each specimen. The residual frictions of SFC concrete were greater than those of OPC concrete under the higher grades of equivalent 28-day compressive strength. The results showed that the green concrete with the no-cement SFC binder can apparently enhance the bonding behavior on the basis of performance evaluation of the residual friction.

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