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Washington State University researchers have received a two-year grant to make more resilient and durable housing materials from thermally-modified cross laminated timber (CLT) and recycled carbon fiber. Laminate Wood Flooring Basement
The researchers, including Pouria Bahmani, assistant professor and Karl Englund, research professor in the Department of Civil and Environmental Engineering, along with Hui Li, assistant research professor in the Composite Materials & Engineering Center, are collaborating with Composite Recycling Technology Center (CRTC) in Port Angeles and Construction Engineering Research Laboratory to explore ways to use advanced thermally-modified CLT material in deployable structures, with a goal of extending its application to single- and two-story residential buildings.
As part of the project, the researchers will analyze the structure and materials and evaluate the possibility of mass-producing these panels — a one-of-a-kind initiative in the Pacific Northwest.
“One primary objective of this project is to develop methods for connecting the panels together, facilitating the construction of modular and deployable structures,” Bahmani said. “We utilize steel connections and will conduct thorough testing to ensure the safety and durability of these structures.”
CLT is an engineered wood product typically used for construction. It consists of layers of wood boards stacked in alternating directions and bonded together with structural adhesives. This cross-lamination technique enhances the strength and stability of the timber panels, allowing them to bear heavy loads and resist deformation.
CLT is renowned for its sustainability, as it is often made from fast-growing trees. It offers several advantages over traditional construction materials, including faster construction times, reduced environmental impact, and excellent thermal properties. The wood product has gained popularity worldwide as a versatile and eco-friendly alternative to concrete, steel, and other conventional building materials. Because it’s lightweight compared to other construction materials, using CLT in modular construction and building projects can also save energy during transportation.
The CRTC has been developing advanced CLT timber that uses thermally modified western hemlock in its formulation. Thermal modification makes the wood more resistant to decay and increases its durability.
The researchers have been working to strengthen the thermally modified wood by adding repurposed carbon fiber composites to the CLT panels. Carbon fiber composite materials are used in many modern products, from aircraft parts to wind turbine blades to fishing rods.
“We are currently focused on exploring the thermal modification process for western hemlock species to create modular, durable, and deployable structures constructed from thermally-treated CLT panels,” he said.
The $360,000 grant is from the CRTC under their award from the U.S. Department of Defense’s Army Corps of Engineers. Bahmani has also recently received a U.S. Department of Housing and Urban Development grant to work on modular mass timber construction to increase housing affordability in the U.S.
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From WSU: Food safety, WSU stories, science answers for kids, and more — listen to podcasts from Washington State University.
Laminate Carpet Stairs About WSU: A selection of programs about Washington State, produced by alumni and friends.