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Properties of recycled aggregate concrete made with recycled aggregates with different amounts of old adhered mortars |
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| Affiliation: | 1. Dept. Metalurgia Física, Centro Nacional de Investigaciones Metalúrgicas, CENIM-CSIC, Av. Gregorio del Amo 8, 28040 Madrid, Spain;2. Facultad de Matemática, Universidad de Castilla-La Mancha, Av. Carlos III s/n, 45071 Toledo, Spain;3. Tecnalia, Mikeletegi Pasealekua 2, Parque Tecnológico, 20009 San Sebastián, Spain;1. Department of Civil Engineering, University of Salerno, via Giovanni Paolo II 132, 84084 Fisciano, SA, Italy;2. Department of Civil Engineering, COPPE, Federal University of Rio de Janeiro, P.O. Box 68506, CEP: 21945-970 Rio de Janeiro, Brazil;3. Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O. Box 5048, 2600 GA Delft, The Netherlands;1. ICIST, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal;2. Department of Civil Engineering, Architecture and Georresources, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisbon, Portugal;3. ISEL, Instituto Superior de Engenharia de Lisboa, R. Conselheiro Emídio Navarro, 1950-062 Lisbon, Portugal;1. Civil Engineering, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal;2. Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisbon, Portugal;3. Director of Applying Concrete Knowledge, 1A Blakeney Avenue, Birmingham, UK |
| Abstract: | This paper presents the experimental results of a study on comparing the difference in properties of recycled aggregates (RAs) with varying amounts of old adhered mortar obtained from different sources and evaluating the influence of the different RAs on the mechanical and durability properties of recycled aggregate concrete (RAC). Four concrete mixes (one with natural aggregate and three others with recycled aggregates) with 28 day target compressive strength varying from 30 MPa to 80 MPa are designed by using each RA to fully replace NA. The properties of RAC are also modeled by using the artificial neural networks (ANN) method.The experimental results show that the performance of RAs from different sources varied greatly and RA of good quality can be used to produce high strength concrete with hardened properties comparable to those of the corresponding natural aggregate concrete (NAC). The comparison of the predicted results based on the ANN models and the experimental values indicated that the ANN method could be used to evaluate the properties of RAC made with RAs derived from different sources. This will facilitate the wider application of RA in concrete. |
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