Overview of meshfree modeling of the flowability of fresh self-compacting concrete for sustainable structures

Abstract

The flow of Bingham non-Newtonian incompressible fluids like concrete is associated with the large deformation of materials. The modeling and simulation of these fluids’ flow behavior by using conventional numerical methods. suffer problem-formulation setbacks due to mesh distortion. In order to compensate for the mathematical inefficiencies encountered in the process, particle-based methods have evolved and been applied. Also, the use of some particle-based methods produces a stretch of unreliability due to the Eulerian algorithmic trail, which visits every particle edge allowing for revisiting vertices during its operation. This makes the model path cumbersome and time-consuming. Concrete flow is an important element of sustainable infrastructural development, and its understanding strengthens the efficiency of concrete handling and placement during construction activities. In this paper, a mesh-free method of modeling the flowability of self-compacting concrete (SCC) known as the smoothed particle hydrodynamics (SPH) has been reviewed. It derives its advantage from the Lagrangian algorithmic trail. This explores its merits and demerits in the concrete construction industry to propose the best practices for the passing ability, filling ability, and dynamic stability of the flowing fresh concrete (FFC)

Numerical modeling of the funnel multiphysical flow of fresh self-compacting concrete considering proportionate heterogeneity of aggregates

“…Kennedy C. Onyelowe 1,2* & Denise-Penelope N. Kontoni 1,3 Filling ability is one of the prominent rheological properties of the self-compacting concrete (SCC), which has been studied in this research work deploying the functional behavior of the concrete through the studied funnel apparatus using the coupled ANSYS-SPH interface. Seven (7) model cases were studied and optimized.…”

“…The multiphysical flow of fresh self-compacting concrete (SCC) takes into account the proportionate heterogeneity of fine and coarse aggregates 1 . SCC is a specialized type of concrete that is highly workable and able to flow and fill complex forms under its own weight without the need for mechanical consolidation 2 .…”

“…SCC is a specialized type of concrete that is highly workable and able to flow and fill complex forms under its own weight without the need for mechanical consolidation 2 . When evaluating the funnel flowability of fresh self-compacting concrete (SCC) while considering the heterogeneity of aggregates, you may need to account for the variation in particle sizes and shapes within the mixture 1 . Approaches that can help incorporate aggregate heterogeneity into the V-funnel flowability assessment include 1 : (a) Aggregate characterization: by characterizing the aggregates in the SCC mixture 2,3 .…”

“…This can help you understand how variations in aggregate heterogeneity affect the flow behavior of SCC. By incorporating aggregate heterogeneity into the numerical simulation of V-funnel flowability, you can gain insights into the impact of aggregates on the workability and flow characteristics of SCC 1,11 . This information can be valuable for optimizing mix designs and improving the performance of selfcompacting concrete in practical applications 4 .…”

“…It's recommended to consult the documentation and resources specific to your software versions or seek assistance from experts in ANSYS and SPH software for detailed instructions and support 1 .The constitutive equations for v-funnel flowability of fresh self-compacting concrete (SCC) considering the heterogeneity of aggregates in a coupled ANSYS-SPH simulation would depend on the specific constitutive models used for the SCC and the numerical methods employed by ANSYS and SPH 20 . The constitutive model for SCC typically includes the following equations:-Bingham Plastic Model: The Bingham model can describe the behavior of SCC under shear stress 1,21 . It assumes that the material behaves as a rigid body until a yield stress is exceeded, after which it flows like a viscous fluid 22 .…”