Simulating macroscopic behavior of self-compacting mixtures with DEM

Hoornahad, H.; Koenders, Eduardus

doi:10.1016/j.cemconcomp.2014.04.006

Cited by 29 publications

(14 citation statements)

References 9 publications

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“…In order to simulate the fresh state properties of self-compacting concrete, Gram [20] proposed an adaptation of the Bingham contact using a spring connected in parallel with a serial connection of a damper and a Saint-Venant element. Other authors [21][22][23][24] have proposed contact models based on stress-strain (σ-ε) curves obtained with laboratory tests in which two spheres surrounded by mortar or cement paste are put in contact. In another study, Remond et al [25] proposed a bi-phasic model with the simulation of a fluid-like interaction between the external layers of the particles.…”

Section: Introductionmentioning

confidence: 99%

Discrete element modelling of the fresh state behavior of pervious concrete

Pieralisi

Cavalaro

Aguado

2016

Cement and Concrete Research

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The objective of this paper is to propose a novel numerical approach to evaluate the fresh state behavior of pervious concrete (PC). A new constitutive law applied to Discrete Element Method was developed for the simulation of the interaction between aggregates connected by fresh cement paste. Several innovative aspects regarding the type of contact model, the consideration of the contact bridge and the inclusion of the rheology coefficients were proposed. A calibration was performed with data from the literature. Furthermore, an extensive experimental program considering different shapes of aggregates, grading curves and aggregate-to-cement paste ratios was conducted to evaluate the fresh state behavior and validate the numerical models. The good fit obtained between numerical and experimental results confirm the model and the constitutive law reproduce the under uniaxial compaction, thus representing a step forward in the design and application of pervious concrete mixes.Peer ReviewedPostprint (author's final draft

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Section: Introductionmentioning

confidence: 99%

Discrete element modelling of the fresh state behavior of pervious concrete

Pieralisi

Cavalaro

Aguado

2016

Cement and Concrete Research

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“…e measured results of the mesocalibration test were close to the real contact parameter value [34]. However, due to the great difference in the shape and size of concrete particles, the testing method of contact parameters was still being further improved [16].…”

Section: Introductionmentioning

confidence: 60%

“…Remond and Pizette [15] proposed a new "hard-core softshell" DEM model to simulate the rheology and slump of concrete. Hoornahad and Koenders [16] used two-phase paste-bridge system as grain-paste-grain interactions to explore the fluidity of fresh concrete. Li et al [17,18] proposed a DEM model for predicting the time-dependent fluidity of fresh concrete.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Motion Behavior of Concrete in Pump Pipe by DEM

Hao

Jin

et al. 2021

Advances in Civil Engineering

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In this paper, the mesocalibration test was used to measure the contact parameters (restitution coefficient, rolling friction coefficient, static friction coefficient, and surface energy) between coarse aggregate particles and mortar particles in Discrete Element Method (DEM) model of concrete. Then, the DEM model of concrete slump was established according to the coarse aggregate gradation to study the flow behavior of coarse aggregate in fresh concrete. The slump test result was compared with the output of the slump DEM model with high consistent, indicating the promising reliability of the mesocalibration test. Finally, based on the mesocalibration test results, the DEM model of pumping concrete was established. It was obtained that the pumping pressure calculated by the numerical model was similar to that of the pumping test with satisfactory accuracy better than the concrete pumping pressure calculated according to the rheological test results of concrete and lubricating layer. On this basis, the movement trajectory of coarse aggregate in the pump pipe was analyzed and the influence of coarse aggregate on the pumping performance of concrete was revealed.

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“…The commercially available DEM code PFC 3D is used for the study. PFC 3D has been previously used to model the effect of missile impact on concrete, for modelling the uniaxial compression test in concrete specimens, as well as self‐compacting concrete and slump in fresh concrete . The 2D version of the code has been used to study size effect under uniaxial compression and in the Brazilian split cylinder test.…”

Section: Modelling the Meso‐structurementioning

confidence: 99%

Effect of meso‐structure on strength and size effect in concrete under tension

Murali

Deb

2017

Num Anal Meth Geomechanics

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SummaryThe effect of heterogeneity in meso level geometric and material properties on tensile strength and size effect in split cylinder specimens is investigated. Critical meso geometric parameters are identified by studying their influence on the evolution of the fracture process zone. A statistical analysis is used to account for dependencies between the parameters. A reversal of the size effect, important for the strength of field specimens, is observed for certain meso geometries. Meso level explanations for this are proposed, and meso geometries likely to show such a reversal are identified. For moderately sized specimens, major trends in the size effect are seen to be almost entirely explained by heterogeneity in the meso geometry. KEYWORDS concrete, discrete element method, meso-structure, size effect

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Simulating macroscopic behavior of self-compacting mixtures with DEM

Cited by 29 publications

References 9 publications

Discrete element modelling of the fresh state behavior of pervious concrete

Discrete element modelling of the fresh state behavior of pervious concrete

Simulation of Motion Behavior of Concrete in Pump Pipe by DEM

Effect of meso‐structure on strength and size effect in concrete under tension

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