Next Article in Journal
Shape Memory Polyurethane Materials Containing Ferromagnetic Iron Oxide and Graphene Nanoplatelets
Next Article in Special Issue
On the Role of Processing Parameters in Producing Recycled Aluminum AA6061 Based Metal Matrix Composite (MMC-AlR) Prepared Using Hot Press Forging (HPF) Process
Previous Article in Journal
Measuring the Pull-Off Force of an Individual Fiber Using a Novel Picoindenter/Scanning Electron Microscope Technique
Previous Article in Special Issue
Green Composites Based on Blends of Polypropylene with Liquid Wood Reinforced with Hemp Fibers: Thermomechanical Properties and the Effect of Recycling Cycles
Open AccessArticle

Bonding Behavior of Deformed Steel Rebars in Sustainable Concrete Containing both Fine and Coarse Recycled Aggregates

1
Department of Construction Engineering Education, Chungnam National University, Daejeon 34134, Korea
2
Department of Architectural Engineering, Chungnam National University, Daejeon 34134, Korea
*
Author to whom correspondence should be addressed.
Materials 2017, 10(9), 1082; https://doi.org/10.3390/ma10091082
Received: 15 August 2017 / Revised: 12 September 2017 / Accepted: 13 September 2017 / Published: 14 September 2017
(This article belongs to the Special Issue Recycled Materials, Eco-design and 3D Printing)
In order to assess the bond behavior of deformed steel rebars in recycled-aggregate concrete (RAC) incorporating both fine and coarse recycled aggregate, pull-out tests were carried out in this study on 16-mm diameter deformed steel rebars embedded concentrically in RAC. The concrete was designed using equivalently mixed proportions of both recycled coarse aggregate and recycled fine aggregate. The tests employed five types of recycled aggregate replacement combinations and three types of rebar placement orientation (i.e., vertical bars and two-tiered and three-tiered horizontal bars). Based on the pull-out test results, the maximum bond strength tended to decrease and the slip at the maximum bond strength increased as the average water absorption of the aggregate increased, irrespective of the rebar orientation or placement location within the concrete member. The pull-out test results for the horizontal steel rebars embedded in RAC indicate that the casting position effect could be determined from the mid-depth of the concrete member, irrespective of the member’s height. The normalized bond versus slip relationship between the deformed rebar and the RAC could be predicted using an empirical model based on regression analysis of the experimental data. View Full-Text
Keywords: recycled aggregate concrete; pull-out test; bond strength; slip; casting position effect recycled aggregate concrete; pull-out test; bond strength; slip; casting position effect
Show Figures

Figure 1

MDPI and ACS Style

Kim, S.-W.; Park, W.-S.; Jang, Y.-I.; Jang, S.-J.; Yun, H.-D. Bonding Behavior of Deformed Steel Rebars in Sustainable Concrete Containing both Fine and Coarse Recycled Aggregates. Materials 2017, 10, 1082.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop