### Prediction of Concrete Pumping: Part I—Development of New

Prediction of Concrete Pumping: Part I—Development of New Tribometer for Analysis of Lubricating Layer A test method is also suggested based on numerical simulation of the shear flow inside the tribometer and, finally, equations capable of transforming the values measured in the new tribometer into the rheological properties of the

GET A QUOTE### From analytical methods to numerical simulations: A

Jul 01, 2014 · A Schwing concrete piston pump of type P 2023 is used in all the filling tests for pumping the SCC inside the formworks. For these base filling processes, a mechanical shut-off valve has been designed at the Laboratory for Hydraulics and the Magnel Laboratory of the Ghent University. The formwork configurations are shown in Fig. 8. Due to handling requirements (connection and …

GET A QUOTE### Numerical Prediction on the Effects of the Coarse

the numerical simulation considering the particle shape effects depending on the coarse aggregate size can accu-rately predict the pumpability of concrete. 2. Numerical methodology for the pipe flow of pumped concrete 2.1 General flow equations The concrete flow in a pipe occurs at low particle Rey-nolds numbers (Re<<1) and the laminar flow

GET A QUOTE### Numerical simulation of concrete pumping process and

To better understand the fresh concrete pumping mechanisms in detail, the discrete element method is employed in this paper for the numerical simulation of local pumping problems. By modeling the coarse aggregates as rigid clumps and appropriately defining the contact models, the concrete flow in representative pipeline units is well revealed.

GET A QUOTE### Numerical Simulation of Various Materials for the Impact

Apr 26, 2021 · Numerical simulation methods and several measures are proposed to protect the existing reinforced concrete slabs and effectively resist impact loads. In the finite element model (FEM), two kinds of concrete material samples are used, with emphasis on the concrete stress, displacement response, and failure state. The FEM of an unprotected reinforced concrete slab at impact loads is …

GET A QUOTE### Numerical simulation of formwork pressure while pumping

Numerical simulation of formwork pressure while pumping self-compacting concrete bottom-up. Serge Tichko, Jens Van De Maele, Niels Vanmassenhove, Geert De Schutter, Jan Vierendeels, Ronny Verhoeven, Peter Troch. Research output: Contribution to journal › Review article › peer-review.

GET A QUOTE### Numerical parametric study of Nonlinear Coda Wave

Sep 01, 2021 · Modeling and numerical simulation In our previous study [46], the corresponding nonclassical nonlinear phenomena was modeled in an effective manner: the influence of a strong pump wave on a localized damage was modeled by a change in the elastic properties, namely the Young's modulus and the attenuation coefficient, which were chosen to be

GET A QUOTE### (PDF) Numerical Study on Concrete Pumping Behavior via

12 rows · Concerning the specific concrete pumping problem, few publications report its numerical

GET A QUOTE### Numerical Study on Concrete Pumping Behavior via Local

Abstract: With the foundation pit of south air shaft nearby Qiantang River, Subway , Hangzhou, Zhejiang province as an example, the interaction between pumping wells and underground concrete wall, together with the soft curtain formed by recharging wells are simulated with numerical method. The results indicate that the proper position of filter tube of pumping well to underground concrete wall …

GET A QUOTE### Numerical parametric study of Nonlinear Coda Wave

Sep 01, 2021 · Modeling and numerical simulation In our previous study [46], the corresponding nonclassical nonlinear phenomena was modeled in an effective manner: the influence of a strong pump wave on a localized damage was modeled by a change in the elastic properties, namely the Young's modulus and the attenuation coefficient, which were chosen to be

GET A QUOTE### Numerical Analysis of Vibration Responses in High-Speed

The length of mud pumping is set to 3.15 m (5 spans of the fastener system and each span is 0.63 m) in the simulation model because the length of mud pumping in the Shanghai–Nanjing high-speed railway is about 3 m to 4 m, and the precise length was not measured due to certain limitations.

GET A QUOTE### Experimental-Computational Investigation of Elastic

height was 407 m, the pumping period of the concrete in the pump pipe was 28 min. The pumping outlet pressure was in the range of 18.6 MPa to 19.8 MPa. When the flow velocity of the pumping concrete was stable, the pump pressure was 19.3 MPa. The pumping water, paste and mortar were used to pre-wet the pipes in turn before

GET A QUOTE### Numerical Study on Concrete Pumping Behavior via Local

Numerical Study on Concrete Pumping Behavior via Local Flow Simulation with Discrete Element Method Yijian Zhan 1, * ID, Jian Gong 1, *, Yulin Huang 1, *, Chong Shi 2 ID, Zibo Zuo 1 and Yiqun Chen 3

GET A QUOTE### Numerical Simulation of Pumping Well-Underground Concrete

Sep 01, 2021 · The following is a brief summary of selected numerical modelling works on the concrete pumping. The majority of the published research on numerical modelling of concrete pumping utilizes the Computational Fluid Dynamics (CFD) approach [18,102], in which concrete is modelled as one single or as multiple phases in a continuum. This means that the

GET A QUOTE### Numerical simulation of formwork pressure while pumping

Apr 30, 2019 · Numerical Simulation of Pumping Behavior In modern construction projects, fresh concrete is usually pr ovided by mixing plants and pumped through …

GET A QUOTE### Numerical Study on Concrete Pumping Behavior via Local

Sep 01, 2020 · Simulation of concrete flow inside the drum of a concrete mixing truck using FVM . Local energy dissipation is plotted for a drum rotation of 0.19 Rps, with 75 Pa·s for plastic viscosity and zero yield stress. 5.4 m 3 of concrete ( Fig. 2 a) and 8.2 m 3 of concrete ( Fig. 2 b).

GET A QUOTE### Materials | Free Full-Text | Numerical Reliability Study

The numerical simulation of cementitious suspensions, Bingham flows in general, shows a huge potential for predicting the flow behaviour in several construction or industrial processes. Numerical simulations for predicting industrial (construction) processes could for instance provide the required pumping pressure, form filling ability, etc.

GET A QUOTE### MESHFREE VISCOELASTIC MODELING: TOWARD …

costly, numerical simulation properly validated with experiments ﬀ a far less costly and more ﬀe alternative. To numerically model the behavior of concrete at fresh or solidiﬁed state, a viscoelastic constitutive law for both small-strain and ﬁnite-strain are introduced based on …

GET A QUOTE### [PDF] Numerical simulations of concrete processing: From

DOI: 10.1016/j.cemconres.2020.106075 Corpus ID: 225250487. Numerical simulations of concrete processing: From standard formative casting to additive manufacturing @article{Roussel2020NumericalSO, title={Numerical simulations of concrete processing: From standard formative casting to additive manufacturing}, author={Nicolas Roussel and Jon Spangenberg and …

GET A QUOTE### Numerical simulation of fresh concrete flow: insight and

Keywords: Fresh concrete flow; Rheology; Numerical simulation; Prediction Introduction The numerical simulations of fresh concrete flow have been increasing in popularity in the last decade [1‐8]. An overview of the studies on this topic can be found in [9‐11]. In 2014, a

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