Characterization of Distinct Element Modeling Parameters for Fresh Concrete and its Application in Shotcrete Simulations

Simulating the behaviour of fresh concrete with the Distinct Element Method – Deriving model parameters related to the yield stress

“…In the article at hand only a very brief summary can be provided. Noor and Uomoto [7], Petersson [8,9], and Puri and Uomoto [10] have modelled self-compacting concrete by applying the Distinct Element Method. In doing so they simulated the behaviour of fresh concrete by defining two element groups, mortar and coarse aggregate, each consisting of interactive particles.…”

“…In the publications cited above [7][8][9][10][11][12][13][14] spherical particles were used, which is appropriate to a variety of purposes. However, recently Stroeven et al [15] and He et al [16] suggested a procedure to model the complex shapes of irregular aggregates.…”

Porosimetry by Random Node Structuring in Virtual Concrete

“…Since the introduction of physical methods for DEM in rock mechanics by Cundall and Strack (1979), also many systems have been developed world-wide in concrete technology; in many cases however this was accomplished for specific and thus restricted purposes. Reference can be given to Jodrey and Torey (1981), Ansell and Dickinson (1986), Mościński et al (1989), Bentz et al (1993), O'Connor et al (1997); Stroeven (1999), Tsunekawa and Iwashita (2001), Puri and Uomoto (2002), Williams and Philipse (2003), Li et al (2006) and Markauskas and Kačia-nauskas (2006). Relevant discussion on this issue can be found in Stroeven et al (2009)…”

Particle interaction and rheological behavior of cement-based materials at micro- and macro-scales

“…After years of improvement (Campbell and Brennen, 1985;Walton and Braun, 1986), it was then used for flow analysis of fresh concrete by Nabeta (1994). Since then, the method has been the most successful method in simulating a wide variety of Noor and Uomoto, 1999; Puri and Uomoto, 2002). To make it applicable to fresh concrete, an allowance of tension can be added to account for ductility or cohesion of mortar.…”

“…To make it applicable to fresh concrete, an allowance of tension can be added to account for ductility or cohesion of mortar. Figure 2.7 shows the assumption made by Puri and Uomoto (2002), where coarse aggregate particles are coated with mortar. On collision of a pair of the aggregate particles, the mortar coating comes into contact first, then followed by the core aggregate particle.…”