Hardened properties of self-compacting concrete — A statistical approach |
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| Affiliation: | 1. Department of Structural Engineering, São Carlos Engineering School, São Paulo University, Av. Trabalhador Sãocarlense, 400, CEP 13566-590, São Carlos, SP, Brazil;2. Department of Construction Engineering, Universitat Politècnica de Catalunya, C/Jordi Girona 1-3, 08034 Barcelona, Spain;1. Civil Engineering Department, University of Guilan, Rasht, Iran;2. Civil Engineering Department, University Campus, University of Guilan, Rasht, Iran;1. Department of Civil Engineering, University of Burgos, EPS. Calle Villadiego s/n, 09001 Burgos, Spain;2. Department of Construction, University of Burgos, EPS, Calle Villadiego s/n, 09001 Burgos, Spain;1. Department of Civil Engineering, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India;2. Centre for Advanced Concrete Research, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Tamil Nadu, India |
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| Abstract: | This work presents a statistical study on the variability of the mechanical properties of hardened self-compacting concrete, including the compressive strength, splitting tensile strength and modulus of elasticity. The comparison of the experimental results with those derived from several codes and recommendations allows evaluating if the hardened behaviour of self-compacting concrete can be appropriately predicted by the existing formulations. The variables analyzed include the maximum size aggregate, paste and gravel content. Results from the analyzed self-compacting concretes presented variability measures in the same range than the expected for conventional vibrated concrete, with all the results within a confidence level of 95%. From several formulations for conventional concrete considered in this study, it was observed that a safe estimation of the modulus of elasticity can be obtained from the value of compressive strength; with lower strength self-compacting concretes presenting higher safety margins. However, most codes overestimate the material tensile strength. |
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