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A smoothed particle hydrodynamics study on modelling the flowability, passability and fill-ability of steel fibre suspended self-compacting concrete.

Mimoun, Abdulkarim and Kulasegaram, Sivakumar 2021. A smoothed particle hydrodynamics study on modelling the flowability, passability and fill-ability of steel fibre suspended self-compacting concrete. Presented at: PARTICLES 2021 VII International Conference on Particle-Based Methods Fundamentals and Applications, Hamburg, Germany, 4 - 6 October, 2021.

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Abstract

Steel fibre has become an attractive alternative to the steel bar reinforcement in self-compacting concrete. To improve efficiency and quality of self-compacting steel fibre reinforced concrete (SCSFRC), it is essential to fully understand the rheological properties of SCSFRC. Due to the nature of self-compacting concrete mix and widely varying properties of its constituents, it is hugely challenging to understand the rheological behaviour of the concrete mix. For this reason, its necessary to thoroughly comprehend fresh property by understanding its rheology. The quality control and accurate prediction of the SCSFRC rheology are crucial for the success of its production. Accurate prediction of SCSFRC flow, passing and filling behaviour is not a trivial task, particularly in the presence of heavy reinforcement, complex formwork shapes and large size of aggregates. In this regard, complex formwork shapes and large size of aggregate can play an important role in fibre orientation and distribution during the flow of fibre reinforced self-compacting concrete and can thus significantly influence mechanical behaviour of the material. Therefore, an indispensable and inexpensive approach offering considerable potential is the accurate numerical simulation of SCSFRC flow. This approach will deepen the understanding of the SCSFRC mix flow behaviour and evaluate its ability to meet the necessary self-compacting criteria of passing ability and segregation resistance. A three-dimensional Lagrangian particle-based smooth particle hydrodynamics methodology is proposed here to simulate the flow characteristics of self-compacting concrete (SCC) mixes. This methodology has been proved to be an accurate and efficient in modelling the flow and monitoring the movement of short steel fibres of SCC in the slump cone flow and L-box test. Further, computational simulations can also assist in proportioning SCC mixes, thus improving on the traditional trial and error SCSFRC mix design based on plastic viscosity and compressive strength. The effectiveness and accuracy of the proposed computational technique are demonstrated via several numerical simulations.

Item Type: Conference or Workshop Item (Paper)
Status: Unpublished
Schools: Engineering
Last Modified: 17 Nov 2021 10:30
URI: https://orca.cardiff.ac.uk/id/eprint/145051

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