Application of high performance polypropylene fibers in concrete lining of water tunnels |
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| Affiliation: | 1. CERIS, Instituto Superior Técnico, Universidade de Lisboa, Portugal;2. Department of Civil Engineering, Architecture and Georesources, Instituto Superior Técnico, Universidade de Lisboa, Portugal;3. Department of Civil Engineering, Instituto Superior de Engenharia de Coimbra, Instituto Politécnico de Coimbra, Portugal;4. School of Civil Engineering, The University of Sydney, Australia;5. ISISE, Departamento de Engenharia Civil, Universidade de Coimbra, Portugal;1. Sakarya University, Faculty of Technology, Civil Engineering Department, 54187 Sakarya, Turkey;2. Yıldız Technical University, Faculty of Civil Engineering, Civil Engineering Department, 34220 Istanbul, Turkey;1. Civil Engineering Department, Islamic Azad University-Khomeinishahr Branch, Isfahan, Iran;2. Civil Engineering Department, Oklahoma State University, OK, USA;3. Department of Civil Engineering, Isfahan University of Technology (IUT), Isfahan, Iran;4. Civil Engineering Department, Islamic Azad University-Khorasgan Branch, Isfahan, Iran |
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| Abstract: | In this study, the application of high performance polypropylene fibers (HPP fibers) in concrete lining of water tunnels, was investigated experimentally. A comparison between the behavior of steel fiber reinforced concrete and HPP fiber reinforced concrete with ordinary concrete is drawn. Advantages and shortcomings of HPP fibers used for concrete lining of water tunnels are also presented.The obtained results showed that the HPP fibers were not effective in compressive strength when compared to steel fibers, but the effects of HPP fibers on tensile strength, flexural strength, toughness and energy absorption of concrete were significant. Based on the results, the effects of HPP fibers on concrete characteristics such as the flexural toughness, concrete permeability and resistance to chloride penetration were higher than those of steel fibers. The results also showed that with application of HPP fibers, durability and serviceability of the concrete linings can be improved. |
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