Experimental evaluation of fiber reinforced concrete fracture properties |
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| Authors: | F Bencardino L Rizzuti G Spadea RN Swamy |
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| Affiliation: | 1. Department of Structural Engineering, University of Calabria, Via P. Bucci Cubo 39B, 87036 Rende (CS), Italy;2. Department of Mechanical Engineering, University of Sheffield, England, UK;1. Nat. Scientific and Technical Research Council (CONICET) & University of Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires, Argentina;2. Department of Structural and Geotechnical Engineering, Sapienza University of Rome, via Eudossiana 18, 00184 Roma, Italy;3. Department of Civil Engineering, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy;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, Department of Civil Engineering, Universidade de Coimbra, Portugal;1. School of Engineering, University of Liverpool, Liverpool L69 3GH, UK;2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China;3. School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, Manchester M13 9PL, UK;1. Grupo de Estructuras, Escuela Técnica Superior de Ingeniería, Universidad de Sevilla, Camino de los Descubrimientos s/n, 41092 Sevilla, Spain;2. Instituto Universitario de Sistemas Inteligentes y Aplicaciones Numéricas en Ingeniería (SIANI), Universidad de Las Palmas de Gran Canaria, Edificio Central del Parque Científico y Tecnológico del Campus Universitario de Tafira, 35017 Las Palmas de Gran Canaria, Spain;1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;2. Shenzhen Institute of Building Research Co., Ltd., Shenzhen 518049, China;3. School of Natural and Built Environment, Queen’s University Belfast, Belfast BT9 5AG, UK |
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| Abstract: | Concrete is now universally recognized a construction material vital and essential for the regeneration and rehabilitation of the infrastructure of a country. The last few decades have now shown that high strength concrete, with a compressive strength of 100–120 MPa can be readily designed and manufactured. There have also been several advances made in the development of fiber reinforced concrete to control cracking and crack propagation in plain concrete, and to increase the overall ductility of the material. However, there are now many types of fibers with different material and geometric properties, and the exact fracture behavior of fiber reinforced concrete materials is not clearly understood. The overall aim of this paper is to establish the fracture properties and fracture behavior of concrete containing two widely used types of fibers, namely, steel (high modulus) and polypropylene (low modulus). The experimental investigation consisted of tests on cubes and notched prismatic specimens made from plain concrete and fiber concrete with 1% and 2% of steel or polypropylene fibers. The cube tests and the three point bending tests on notched specimens were carried out according to RILEM specifications, and extensive data on their compressive and flexural tensile behavior and fracture energy were recorded and analyzed. The results obtained from the tests are critically assessed, and it is shown that fibers contribute immensely to the structural integrity and structural stability of concrete elements and thereby improve their durable service life. |
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