DEVELOPMENT OF 3D PRINTED CEMENTITIOUS MATERIALS: MIX AND MACHINERY DESIGN
Abstrak
Three-dimensional (3D) printing of cementitious materials is an attractive technology for structural applications due to decreased construction time, design versatility, and possible superior mechanical performance and durability. However, challenges exist in processing because components rely on green strength and stiffness to resist instability during construction. This research investigates cementitious mix design and extrusion techniques to advance engineering of 3D printed composites. In the first phase, extrudable mix designs were developed. In the second phase, the mechanical engineering design of the extruder (pump pressure, motor properties, rotating versus sliding piston, bearing design, and gantry stiffness) was investigated. The study found: (1) methylcellulose can provide shape stability, (2) sand is challenging due to phase migration under high pressures, and (3) a piston-driven extruder capable of providing pressures exceeding 345 kPa (50 psi) is needed to print these mix designs.
Penulis (5)
D. Lehman
M. Ganter
Katherine Kuder
Jacob Roth
Hailey Stenslie
Akses Cepat
- Tahun Terbit
- 2024
- Bahasa
- en
- Sumber Database
- Semantic Scholar
- DOI
- 10.18552/2024/scmt/211
- Akses
- Open Access ✓