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Advances in Concrete Construction Volume 15, Number 1, January 2023 , pages 23-39 DOI: https://doi.org/10.12989/acc.2023.15.1.023 |
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Effect of length and content of steel fibers on the flexural and impact performance of self-compacting cementitious composite panels |
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Denise-Penelope N. Kontoni, Behnaz Jahangiri, Ahmad Dalvand and Mozafar Shokri-Rad
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| Abstract | ||
| One of the important problems of concrete placing is the concrete compaction, which can affect the strength, durability and apparent quality of the hardened concrete. Therefore, vibrating operations might be accompanied by much noise and the need for training the involved workers, while inappropriate functioning can result in many problems. One of the most important methods to solve these problems is to utilize self-compacting cementitious composites instead of the normal concrete. Due to their benefits of these new materials, such as high tensile, compressive, and flexural strength, have drawn the researchers' attention to this type of cementitious composite more than ever. In this experimental investigation, six mixing designs were selected as a base to acquire the best mechanical properties. Moreover, forty-eight rectangular composite panels with dimensions of 300 mm × 400 mm and two thickness values of 30 mm and 50 mm were cast and tested to compare the flexural and impact energy absorption. Steel fibers with volume fractions of 0%, 0.5% and 1% and with lengths of 25 mm and 50 mm were imposed in order to prepare the required cement composites. In this research, the composite panels with two thicknesses of 30 mm and 50 mm, classified into 12 different groups, were cast and tested under three-point flexural bending and repeated drop weight impact test, respectively. Also, the examination and comparison of flexural energy absorption with impact energy absorption were one of the other aims of this research. The obtained results showed that the addition of fibers of longer length improved the mechanical properties of specimens. On the other hand, the findings of the flexural and impact test on the self-compacting composite panels indicated a stronger influence of the long-length fibers. | ||
| Key Words | ||
| cementitious composites; flexural strength; impact strength; self-compacting; steel fibers; tensile strength | ||
| Address | ||
| (1) Denise-Penelope N. Kontoni: Department of Civil Engineering, School of Engineering, University of the Peloponnese, GR-26334 Patras, Greece; (2) Denise-Penelope N. Kontoni: School of Science and Technology, Hellenic Open University, GR-26335 Patras, Greece; (3) Behnaz Jahangiri, Ahmad Dalvand, Mozafar Shokri-Rad: Faculty of Engineering, Lorestan University, Khorramabad, Iran; (4) Ahmad Dalvand: Centre for Infrastructure Engineering, Western Sydney University, Penrith NSW 2751, Australia. | ||
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