Enhancing Concrete Formulations

for Additive Manufacturing

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Introduction

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Motivation

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Project Progression

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Performance Goals

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Experimental Method

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Technical Approach

σ σ ε

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Experimental Approach 8

Design of Experiments

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Prototype Fabrication

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Prototype Assembly

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Facilities

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Prototype Testing

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Zhou et al.

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ANSYS Fluent Simulation

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ANSYS Fluent Simulation (cont.)

● Discrete Phase Model (DPM) o Allows for multiple fluid and particulate phases

o Fluid phase (i.e. the cement) is modeled as a Newtonian

fluid

o Aggregate (sand) and entrained air bubbles both modeled

as inert particle injections

Sand - 500μm diameter

Air bubbles - 1mm diameter

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Results

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ANSYS Fluent Simulation

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Time (1/10 seconds)

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Prototype Results

Fiber Aggregate Results Sand Aggregate Results

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Prototype Results (cont.)

Different Mixing Times

Timeline

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Budget

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Scale-Up Cost Analysis

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Current 3D Concrete Printers

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Future Work

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Questions?

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References

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