Location
Innovation Lab, Room 212
Start Date
4-3-2025 11:00 AM
End Date
4-3-2025 11:30 AM
Presentation Date
3 April 2025, 11:00am - 11:30am
Biography
Ali Fasihi is a Ph.D. candidate in Civil Engineering at Missouri University of Science and Technology, specializing in the active control of rheological properties for 3D concrete printing. In collaboration with his advisor, he co-invented an automatic penetrometer (patent pending) and has developed several advanced rheological testing devices, including a coaxial rheometer, green strength tester, shear box and tip penetration apparatus. Fasihi has authored over ten peer-reviewed publications and has been recognized with multiple prestigious awards, including the 2024 American Concrete Institute (ACI) Scholarship and Wei-Wen Yu Fellowship awards. Prior to his doctoral studies, he served as a structural engineer and project manager, leading major construction and seismic retrofit projects. His integrated expertise in practical engineering and cutting-edge research continues to advance the field of 3D concrete printing.
Meeting Name
2025 - Miners Solving for Tomorrow Research Conference
Department(s)
Civil, Architectural and Environmental Engineering
Document Type
Presentation
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2025 The Authors, All rights reserved
Included in
Fast Penetration Test as an In-Situ Method for Assessing Buildability in 3D Concrete Printing
Innovation Lab, Room 212
Comments
Advisor: Nicolas Ali Libre
Award: Best Oral Presentation - Graduate
Abstract:
The buildability of 3D printed concrete structures strongly depends on the static yield stress of the printing material. While rheometers offer precise measurements, their lack of portability limits in-situ applications. This study proposes the penetration test as a practical alternative for field-based static yield stress assessment. First, a strong correlation was established between penetration test results and vane rheometer measurements. Then, twelve printable concrete mixtures were developed, and their buildability was quantitatively evaluated using the settlement factor. Finally, the minimum static yield stress required for buildability was determined using the penetration test. Results indicated that a static yield stress of 800 Pa is necessary to ensure buildability, confirming the penetration test as a reliable in-situ method.