Location
Innovation Lab Atrium
Start Date
4-3-2025 10:00 AM
End Date
4-3-2025 11:30 AM
Presentation Date
3 April 2025, 10:00am - 11:30am
Biography
Haodao Li is a PhD candidate in Civil Engineering at Missouri S&T, where he has been conducting research on construction materials since August 2021. He is responsible for projects funded by the U.S. Army Engineer Research and Development Center, focusing on fiber-reinforced 3D-printed cement composites using indigenous materials. During his doctoral studies, he became an active technical RILEM committee, where he contributed to interlaboratory round-robin works. He has co-authored a book, 14 peer-reviewed journal articles, and five conference proceedings. He also served as a Topic Editor for MDPI journals. His research and professional contributions were recognized with several awards, including the Award of Excellence at the Third International Interactive Symposium on Ultra-High-Performance Concrete.
Meeting Name
2025 - Miners Solving for Tomorrow Research Conference
Department(s)
Civil, Architectural and Environmental Engineering
Document Type
Poster
Document Version
Final Version
File Type
event
Language(s)
English
Rights
© 2025 The Authors, All rights reserved
Digital Fabrication with Fiber-Reinforced Concrete
Innovation Lab Atrium
Comments
Advisor: Kamal Khayat
Award: Best Oral Presentation - Graduate (tie)
Abstract:
Non-reinforced 3D-printed concrete structures typically exhibit brittleness and have a low tensile-to-compressive strength ratio. However, traditional steel rebars are challenging to embed during the layer-wise deposition in 3D concrete printing (3DCP). Short fiber reinforcement is a competing strategy since the fibers can be incorporated into 3DCP mixtures to enhance mechanical properties while also mitigating the risk of shrinkage-induced cracking and reducing crack width. This study developed three classes of fiber-reinforced mixtures, namely ultra-high-performance concrete (UHPC), high-performance concrete (HPC), and conventional concrete (CC). Anisotropic mechanical behavior was observed in 3D-printed elements due to the presence of interlayer. The in-situ 28-day compressive strengths of 3D-printed UHPC, HPC, and CC reached 147, 102, and 38 MPa, respectively, while their corresponding flexural strengths were 24, 14, and 5 MPa in the preferred loading direction. These findings address the structural challenge in 3DCP, promoting scalable applications in load-bearing structures.