You are here: Home / Research Topics / Research Highlights / Individual Highlight

Research Highlights

Individual Highlight

Bonding Mixed Species for Advanced Biomaterials

Photo of Laboratory experimental process to evaluate adhesive bonding properties of CLT made from hardwood and softwood species grown in the Great Lakes region.Laboratory experimental process to evaluate adhesive bonding properties of CLT made from hardwood and softwood species grown in the Great Lakes region.Snapshot : Massive composite timbers, such as cross laminated timber (CLT), are essential for tall timber buildings that require use of locally available wood resources to reduce manufacturing costs and minimize environmental impacts. This opens a potential sustainable market for undervalued hardwood forest feedstock dominating the Lake States and the Northeast region of United States.

Principal Investigators(s) :
Wang, XipingRoss, Robert J.
Research Location : Lake States and the Northeast region of United States
Research Station : Forest Products Laboratory (FPL)
Year : 2018
Highlight ID : 1509

Summary

Interest in using hardwood species for advanced structural materials has grown in the United States and globally because of an anticipated increase in hardwood timber resources in the near future. Hardwoods are known for better strength properties associated with their relatively higher mean density values compared with most softwood species. Therefore, incorporation of hardwood species with higher mechanical properties for structure reinforcement, where high-strength performance is required, has been considered for solid wood-based structural products, such as glulam and cross laminated timber (CLT). To ensure material integrity of mixed-species structural products, bonding properties, including strength and durability, must be studied. In this project, researchers investigated the adhesive bonding properties of seven hardwood species and two softwood species from forest lands in the Great Lakes states, and two commercially available structural adhesives. The selected hardwoods include both ring-porous and diffuse porous species. The bonding strength and durability were tested in accordance with ASTM and AITC standards for cross-lamination of individual species and mixed species. The results from this project will provide key baseline technical data on adhesion properties of bonding mixed northern wood species. The results will show if current bonding parameters specified by the adhesive providers work with mixed species in CLT production.

Forest Service Partners

External Partners

  • N/A
  • Michigan Technological University