Version 1
: Received: 2 June 2022 / Approved: 3 June 2022 / Online: 3 June 2022 (09:46:23 CEST)
How to cite:
Castellón, R.C.; Alberti, M.G.; Galvez, J.C.; Vera-Agullo, J.; Pina-Zapardiel, R. Comparison of the Mechanical Properties of Fiber Reinforced Shotcrete at Laboratory and On-Site Conditions. Preprints2022, 2022060037. https://doi.org/10.20944/preprints202206.0037.v1
Castellón, R.C.; Alberti, M.G.; Galvez, J.C.; Vera-Agullo, J.; Pina-Zapardiel, R. Comparison of the Mechanical Properties of Fiber Reinforced Shotcrete at Laboratory and On-Site Conditions. Preprints 2022, 2022060037. https://doi.org/10.20944/preprints202206.0037.v1
Castellón, R.C.; Alberti, M.G.; Galvez, J.C.; Vera-Agullo, J.; Pina-Zapardiel, R. Comparison of the Mechanical Properties of Fiber Reinforced Shotcrete at Laboratory and On-Site Conditions. Preprints2022, 2022060037. https://doi.org/10.20944/preprints202206.0037.v1
APA Style
Castellón, R.C., Alberti, M.G., Galvez, J.C., Vera-Agullo, J., & Pina-Zapardiel, R. (2022). Comparison of the Mechanical Properties of Fiber Reinforced Shotcrete at Laboratory and On-Site Conditions. Preprints. https://doi.org/10.20944/preprints202206.0037.v1
Chicago/Turabian Style
Castellón, R.C., José Vera-Agullo and Raul Pina-Zapardiel. 2022 "Comparison of the Mechanical Properties of Fiber Reinforced Shotcrete at Laboratory and On-Site Conditions" Preprints. https://doi.org/10.20944/preprints202206.0037.v1
Abstract
Steel fibers (SF) and polyolefin (PF) are widely used for shotcrete, especially in tunnelling. Both SF and PF and have shown to meet the standards in order to reduce or substitute the conventional steel mesh as reinforcement of concrete showing mechanical and productive advantages. This study sought the analysis and assessment of the mechanical properties of fiber reinforced shotcrete, comparing in-situ with laboratory results. This was performed with low and high fiber dosages of SF and PF as well as a combination of them (hybrid mixtures). A total of seven mixtures, two of steel, two of polyolefins, two hybrids and a control mixture were manufactured at laboratory and in situ. By performing tests according to EN 14651 and slabs according to EN 14488-5, it was possible to characterize the residual flexural strengths (fRj), and energy absorption capacity (E25mm) in slabs. In addition, a fracture surface analysis was performed, and the orientation factor was obtained. This allowed the authors to quantify the loss of residual strength on site and correlate it with the fiber content and positioning. Moreover, some relationships between beam and slab tests were found, allowing to correlate the most relevant type of tests in the field of fiber reinforced concrete.
Keywords
Fracture energy (GF); energy absorption capacity (E25mm); residual flexural strength(fRj); fibers
Subject
Engineering, Civil Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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