Influence of Polypropylene and Steel Fibers on the Performance and Crack Repair of Self-Compacting Concrete |
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| Authors: | Mohammed A Abed Jan Fo&#x;t Abdulkarim Naoulo Amr Essa |
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| Institution: | 1.Department of Civil and Environmental Engineering, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA;2.Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, 16629 Prague, Czech Republic;3.Department of Structural Engineering, Budapest University of Technology and Economics, 1111 Budapest, Hungary; (A.N.); (A.E.) |
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| Abstract: | The research reported in this paper aims to evaluate the epoxy injection technique used to strengthen fiber-reinforced self-compacting concrete (FRSCC) with high strength. This method is carried out on ruptured concrete specimens to assess the efficiency of the epoxy resin adhesive injection retrofitting technique for strength and stiffness. Five FRSCC mixes were designed and placed using different types (steel and polypropylene) and contents (0%, 0.25%, and 0.45% by volume) of fibers. The fresh and mechanical properties in addition to the microstructure of produced mixes were evaluated to assess the impact of fibers on the behavior of FRSCC. Results showed that the workability of FRSCC is reduced by increasing steel or polypropylene fiber content; however, the rheological characteristics of placed mixes satisfied the European Guidelines for Self-Compacting Concrete recommendation for fresh concrete. Also, splitting tensile, flexural, and shear strengths were enhanced by increasing fiber content. The simultaneous application of epoxy injection in FRSCC for repairing damaged concrete beams was shown to be highly effective. |
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| Keywords: | epoxy injection polypropylene fiber steel fiber mechanical properties crack repair workability |
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