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      Shear Strength of Fiber Reinforced Recycled Aggregate Concrete

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          Abstract

          In this paper, shear strength of fiber reinforced recycled concrete was investigated. A Self Consolidated Concrete (SCC) matrix with 100% coarse recycled aggregate and different types of fibers were used in the study. Steel (3D and 5D), synthetic and hybrid fibers with a volume fraction of 0.75% were added to the concrete matrix to prepare eight beams. In addition, two beams were cast without fibers as control specimens. All beams were prepared without shear reinforcement and were tested to evaluate concrete contribution to the shear capacity. In addition, optical images were captured to allow for full-field displacement measurements using Digital Image Correlation (DIC). The results showed about 23.44–64.48% improvement in the average concrete shear capacity for fiber-reinforced beams when compared to that of the control specimens. The percentage improvement was affected by fiber type and the steel fiber beams achieved the best performance. The addition of the fiber delayed the crack initiation and improved the post-cracking and ductile behavior of all beams. Moreover, the experimental results were compared to those predicted by codes and proposed equations found in the literature for concrete strength with and without fibers.

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          Most cited references95

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          A review of recycled aggregate in concrete applications (2000–2017)

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            Compressive stress–strain behavior of steel fiber reinforced-recycled aggregate concrete

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              Influence of double hooked-end steel fibers and slag on mechanical and durability properties of high performance recycled aggregate concrete

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                Author and article information

                Journal
                Materials (Basel)
                Materials (Basel)
                materials
                Materials
                MDPI
                1996-1944
                20 September 2020
                September 2020
                : 13
                : 18
                : 4183
                Affiliations
                [1 ]Civil Engineering Department, American University of Sharjah (AUS), Sharjah P.O. Box 26666, UAE; b00039215@ 123456aus.edu
                [2 ]Department of Engineering Systems and Environment, University of Virginia, Charlottesville, VA 22903, USA; ay8tb@ 123456virginia.edu
                [3 ]Mechanical Engineering Department, American University of Sharjah (AUS), Sharjah P.O. Box 26666, UAE; wabuzaid@ 123456aus.edu
                Author notes
                [* ]Correspondence: syehia@ 123456aus.edu
                Author information
                https://orcid.org/0000-0003-3103-7474
                https://orcid.org/0000-0002-3763-9663
                https://orcid.org/0000-0002-3118-5074
                Article
                materials-13-04183
                10.3390/ma13184183
                7560474
                32962287
                6db05f22-a8b4-4a27-954a-577ae9cba794
                © 2020 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 30 August 2020
                : 17 September 2020
                Categories
                Article

                concrete shear strength,recycled aggregate,steel fiber,synthetic and hybrid fibers

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