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23/05/2018

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Survey on the modulus of elasticity and the tensile strength of SCC.

For more than 20 years, research is performed on the applicability, mix design, rheology, durability, etc. of self-compacting concrete (SCC). The number of projects focusing on the mechanical behaviour of SCC however is rather limited, nevertheless most researchers report compressive strength and/or other mechanical properties of the tested self-compacting concrete mixtures. In practice, a gain in knowledge and reliability concerning the properties of SCC, in fresh and hardened state, and especially for application based mixtures, is required. To enable an overall view of the performance of SCC on the mechanical level, a database was developed, in the scope of activities of the RILEM TC228-MPS, including information on the mix design, fresh properties and hardened properties. This dataset contains results of more than 200 papers worldwide. In this paper the mechanical behaviour of SCC is evaluated, more precisely the modulus of elasticity and the tensile strength. The SCC results obtained from the database are compared with the formulations and existing models developed for conventional vibrated concrete mentioned in Eurocode 2 (EC2) and the Model Code (MC90 and/or MC2010). Moreover, the influence of different parameters (e.g. aggregate type, paste volume, etc.) on the E-modulus and the tensile strength (direct, splitting and flexural) are analysed to obtain a more in depth view on the performance of SCC, and to enable, if deemed necessary, an extension of the different models.

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