Mechanical reinforcement of concrete with bi-component fibers |
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| Affiliation: | 1. Empa, Swiss federal Laboratories for Materials Testing and Research, Überlandstrasse 129, 8600 Dübendorf, Switzerland;2. Fibrotec AG, Mollis, Switzerland;1. Dpt. Of Signal Processing and Electronic Systems (SSE), SUPELEC, Gif-sur-Yvette, FRANCE;2. Dpt. of Electronics Engineering, UAB, Cerdanyola del Vallès, Spain;1. Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Rd. A120, Evanston, IL, 60208, USA;2. Christian Doppler Laboratory LiCRoFast, Department of Civil Engineering and Natural Hazards, University of Natural Resources and Life Sciences (BOKU), Vienna, Austria;3. Department of Architecture and Civil Engineering, Shanghai Normal University, 100 Haisi Rd. Fengxian District, Shanghai, PR China;4. Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Rd. A123, Evanston, IL, 60208, USA;1. Fibre and Particle Engineering, Faculty of Technology, Univ. of Oulu, P.O. Box 4300, 90014 Oulu, Finland;2. Department of Engineering, Lorestan University, Khorramabad, Iran;3. Faculty of Civil Engineering, Semnan University, Semnan, Iran;1. Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Str. 6, D-01069 Dresden, Germany;2. “V. A. Bely” Metal-Polymer Research Institute, National Academy of Sciences of Belarus, Kirov Str. 32a, 246050 Gomel, Belarus;3. BAM Federal Institute for Materials Research and Testing, Unter den Eichen 87, D-12205 Berlin, Germany;4. Textechno Herbert Stein GmbH & Co. KG, Dohrweg 65, 41066 Mönchengladbach, Germany |
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| Abstract: | For some applications the reinforcement of concrete with fibers is an economical alternative to conventional steel bar reinforcement. Steel fibers have been the first choice for many years because of their high tensile strength and high elastic modulus. Low modulus fibers, such as polyolefin based fibers generally are thought to be less suitable for this purpose.However, it is shown that polyolefin fibers with sufficient tensile strength can, applying a novel bi-component approach, successfully enhance the mechanical properties of concrete. The effect of the introduction of nanoparticles into the fiber polymers and of a fiber surface structuring on the fiber pull-out characteristics and the fiber–matrix bond strength is presented.The performance of bi-component fiber reinforced concrete is studied in 4-point bending and square slab tests. Ductile post-peak behavior of such fiber reinforced concrete is achieved, making this new fiber technology interesting for applications in pre-cast elements, industrial floors and earth quake protecting systems. |
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