TY - CONF A1 - Vasilic, Ksenija A1 - Kühne, Hans-Carsten A1 - Schmidt, Wolfram A1 - Roussel, N. T1 - Numerical simulations of scc casting: parameter determination N2 - The paper addresses numerical modelling of fresh self-compacting concrete. In the previous studies, a numerical tool for casting prediction is built based on the assumption that fresh concrete behaves as a yield-stress fluid and treating zones with rebars as porous media. The present contribution discusses the determination of material parameters, which are required as an input for numerical simulations of casting processes. T2 - International RILEM Conference on Materials, Systems and Structures in Civil Engineering 2016, Segment on Fresh Concrete CY - Lyngby, Denmark DA - 22.08.2016 KW - Fresh concrete KW - Simulation KW - CFD KW - Rheology PY - 2016 SN - 978-2-35158-184-1 SP - 163 EP - 172 PB - RILEM Publications S.A.R.L. CY - Paris, France AN - OPUS4-37446 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Roussel, N. A1 - Gram, A. A1 - Cremonesi, M. A1 - Ferrara, L. A1 - Krenzer, K. A1 - Mechtcherine, V. A1 - Shyshko, S. A1 - Skocec, J. A1 - Spangenberg, J. A1 - Svec, O. A1 - Thrane, L. N. A1 - Vasilic, Ksenija T1 - Numerical simulations of concrete flow: A benchmark comparison N2 - First, we define in this paper two benchmark flows readily usable by anyone calibrating a numerical tool for concrete flow prediction. Such benchmark flows shall allow anyone to check the validity of their computational tools no matter the numerical methods and parameters they choose. Second, we compare numerical predictions of the concrete sample final shape for these two benchmark flows obtained by various research teams around the world using various numerical techniques. Our results show that all numerical techniques compared here give very similar results suggesting that numerical simulations of concrete filling ability when neglecting any potential components segregation have reached a technology readiness level bringing them closer to industrial practice. KW - Casting KW - Fresh Concrete KW - Rheology KW - Workability KW - Modeling PY - 2016 UR - http://www.sciencedirect.com/science/article/pii/S0008884615002604 U6 - https://doi.org/10.1016/j.cemconres.2015.09.022 SN - 0008-8846 VL - 2016/79 SP - 265 EP - 271 PB - Elsevier Ltd. AN - OPUS4-37440 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Vasilic, Ksenija A1 - Schmidt, Wolfram A1 - Kühne, Hans-Carsten A1 - Haamkens, Frank A1 - Mechtcherine, V. A1 - Roussel, N. T1 - Flow of fresh concrete through reinforced elements: Experimental validation of the porous analogy numerical method N2 - Numerical simulations of concrete castings are complex and time consuming. In order to decrease simulation time and to simplify simulation procedure, an innovative modelling approach, which treats reinforced sections in a formwork as porous media, was proposed. In the previous studies, this numerical model was proved suitable to simulate casting of model yield-stress fluids through reinforced elements. This article focuses on the experimental validation of the proposed model at the concrete scale. For this purpose, a large-scale laboratory casting of a highly reinforced beam is performed. The casting process is numerically simulated and the numerical results are compared to the experimental measurements. KW - Porous medium KW - Self-compacting concrete KW - Casting KW - CFD simulation KW - Reinforcement PY - 2016 UR - http://www.sciencedirect.com/science/article/pii/S0008884616301880 U6 - https://doi.org/10.1016/j.cemconres.2016.06.003 SN - 0008-8846 VL - 2016/88 SP - 1 EP - 6 PB - Elsevier Ltd. AN - OPUS4-37441 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -