Ehsan Baharlou will present his research titled “Material Tectonics” on Saturday, October 21 at the 2023 ACSA/AIA Intersections Research Conference: Material Economies. Dr. Baharlou’s research focuses on integrating material capacities and fabrication limitations into design processes. He will delve into material tectonics, focusing on approaches to develop eco-resilient structures using robotic additive manufacturing. The project highlights the difficulties and potentials of 3D printing eco-resilient materials in order to reduce the embodied energy of the building industry. He will present during the session on material technologies.
For more information on the ACSA/AIA conference, please go here.
MyCoLab: Robotic Fabrication of Architectured Mycelium Composites for Sustainable Construction
Description
Increasing awareness of the embodied carbon footprint of buildings has shifted interest in the construction industry towards the development of renewable and biodegradable materials to create a sustainable built environment and circular economy.
Mycelium, a subsurface system of fungal hyphae, has unique characteristics that can be leveraged to produce low carbon, energy-efficient, bio-based building materials. When combined with organic substrates such as sawdust, straw, or hemp, mycelium develops a network of extremely dense fibers and acts as a natural binder to create composite materials without a need for energy input or synthetic adhesives. Mycelium-bonded composites have been commonly fabricated by pouring the substrate and mycelium spawn into a mold and leaving it for the mycelium to grow.
Although molding is a simple process in fabrication, it bears two limitations that cripple the adoption of this approach for sustainable construction. First, this fabrication process limits the size, especially the depth, of end products. Fungal growth in the core of large-size components remains challenging due to the organism’s need for oxygen for optimal growth. Second, the shape and complexity of elements depend on the availability of molds, which limits design freedom. Novel strategies that eliminate the need for molds, whether single use or reusable, will lead to more sustainable construction practices.
Recent advances in additive manufacturing have enabled the design and fabrication of complex, innovative materials that are technologically and economically feasible. Linking these advantages offered by a new manufacturing technique with data-driven material design approaches will set the groundwork for achieving dramatic progress in the fabrication of large-scale circular mycelium composites.
This CoLab project brings together a cross-disciplinary team to develop the fundamental knowledge needed to exploit the unique properties of mycelium in the fabrication of high-performance composite materials for building applications. The team hypothesizes that by altering the inner makeup of mycelium composites, including composition and internal structure at the microlevel and at larger length scales, inventive materials with improved thermal, acoustic, and mechanical properties can be designed.
The goal of this pilot study is to develop an understanding of key factors that affect the performance of additively manufactured mycelium composites. The successful demonstration of these ideas will position the team to compete strongly in major external funding opportunities and emerge as leaders in the Sustainable Construction research program.
Project Team
Ehsan Baharlou (Assistant Professor, School of Architecture), Prasanna Balachandran (Assistant Professor, Dept. of Material Science & Engineering), Osman Ozbulut (Associate Professor, Dept. of Engineering Systems & Environment)
The Co-designing Circular Plastics project was a small initiative. As proof of concept, PI 3D printed a scaled chair (1:2) with an industrial robotic arm.
Development of a Co-designed Circular Interface
A user interface (UI) will be developed to integrate distinct aspects of user-friendly and circular economy.
Implementation of Co-designed Circular Construction
A design for fabrication method has been developed to integrate material properties and robotic fabrication into consideration. This integrated design method follows the principles of co-designing circular plastics. The process includes the preparation of recycled materials for printing a chair with an industrial robotic arm.
The Result of Co-designed Circular Plastics
A scaled model (1:2) of a chair was designed based on human ergonomics while considering material and fabrication capacities.
Since 2018, PI has developed an advanced technology curriculum that highlights the agency of materials in our built environment. Courses like ARCH5500-Computational design and construction, ARCH5500–Behavioral robotic fabrication, ARCH 5500-Cognitive design and fabrication, and ARCH5500-Robotic additive manufacturing focus on applying advanced technologies in design. This fund supported these ongoing curricula to advance UVA’s position in sustainability for design and construction. It helped students learn a new economic model in design and construction.
Author and Image Credit
Ehsan Baharlou
Image Credit
Ehsan Baharlou, CT .lab, University of Virginia, 2023
“When a structural concept has found its implementation through construction, the visual result will affect us through certain expressive qualities which clearly have something to do with the play of forces and corresponding arrangement of parts in the building, yet cannot be described in terms of construction and structure alone. For these qualities, which are expressive of a relation of form to force, the term tectonic should be reserved.”
— Eduard F. Sekler (1960), “Structure, Construction, Tectonics”, in Structure in Art and in Science.
Description
Advances in computational design methods and fabrication techniques provide new possibilities for architectural designers to consider different paradigms for design and making. These paradigms emphasize the relationship between formation and materialization. Through robotic additive manufacturing, designers can construct buildings or building elements quickly.
The studio “Additive Tectonics” explored the tectonic expression of additive manufacturing in different architectural contexts, from constructing affordable housing with earth materials to investigating the construction of settlements on other planets. The studio focused on the exploration of such architectural tectonics as an abstracted skin or wall system; a tower or a column as a structural element; a vault or a shell as a roof system; a hut or a shed; or other, new building tectonics. One-to-one structures were designed for the North Terrace at the University of Virginia’s Campbell Hall.
Students explored additive tectonics through three stages. The material system development stage demonstrated various materials—such as bio-based, bio-degradable, or bioplastic materials—and their properties and limitations in additive manufacturing. In computational design development, students considered the material properties and fabrication constraints in prototyping. Finally, robotic additive construction—which can be defined as abstraction, formation, rationalization, and materialization to explore novel tectonics—enabled students to execute their design prototype to examine their design’s tectonic potential in building an architectural element.
A series of integrative workshops supported this studio. Formation workshops introduced Grasshopper as a CAD software that can be used for form generation. Materialization workshops presented students with a numerical-based fabrication process. Students learned to control an industrial robotic arm and 3D-print tectonic prototypes.
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