Flow of fresh concrete through reinforced elements: Experimental validation of the porous analogy numerical method

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.

[1]  Nicolas Roussel,et al.  The LCPC BOX: a cheap and simple technique for yield stress measurements of SCC , 2007 .

[2]  Wolfram Schmidt,et al.  The Working Mechanism of Starch and Diutan Gum in Cementitious and Limestone Dispersions in Presence of Polycarboxylate Ether Superplasticizers , 2013 .

[3]  K. Sorbie,et al.  Experimental and modeling study of Newtonian and non-Newtonian fluid flow in pore network micromodels. , 2006, Journal of colloid and interface science.

[4]  Thi Lien Huong Nguyen,et al.  General probabilistic approach to the filtration process. , 2007, Physical review letters.

[5]  Birgit Meng,et al.  Influences of superplasticizer modification and mixture composition on the performance of self-compacting concrete at varied ambient temperatures , 2014 .

[6]  L. Nyholm Thrane,et al.  Modelling the flow of self-compacting concrete , 2012 .

[7]  Viktor Mechtcherine,et al.  Simulating the behaviour of fresh concrete with the Distinct Element Method – Deriving model parameters related to the yield stress , 2015 .

[8]  Nicolas Roussel,et al.  “Fifty-cent rheometer” for yield stress measurements: From slump to spreading flow , 2005 .

[9]  Liberato Ferrara,et al.  Numerical simulations of concrete flow: A benchmark comparison , 2016 .

[10]  Knut Krenzer,et al.  Simulation of fresh concrete flow using Discrete Element Method (DEM): theory and applications , 2014 .

[11]  Nicolas Roussel,et al.  Passing Ability of Fresh Concrete: A Probabilistic Approach , 2009 .

[12]  Frédéric Dufour,et al.  Computational modeling of concrete flow: General overview , 2007 .

[13]  Annika Gram,et al.  Simulation of Fresh Concrete Flow , 2014 .

[14]  Nicolas Roussel,et al.  Rheology of fresh concrete: from measurements to predictions of casting processes , 2007 .

[15]  B. Lagerblad,et al.  Obtaining Rheological Parameters from Slump Flow Test for Self-Compacting Concrete , 2013 .

[16]  Ksenija Vasilic,et al.  A Numerical Model for Self-Compacting Concrete Flow through Reinforced Sections: a Porous Medium Analogy , 2014 .

[17]  Birgit Meng,et al.  Flow of fresh concrete through steel bars: A porous medium analogy , 2011 .

[18]  Jon Elvar Wallevik,et al.  Relationship between the Bingham parameters and slump , 2006 .