Sustainable Roofing/Waterproofing Membranes Comprising Lignin
Project Start Date: 10/01/2022
Project End Date: 31/03/2024
CRIBE Funding: $150,000
Project Total Value: $334,770
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Project Lead: Soprema
Consortium Members: Soprema, FPInnovations, West Fraser, Kruger and Noram Engineering
The goal of this project is to demonstrate the feasibility of using lignin to replace part of the bitumen used for roofing and waterproofing membrane applications.
Soprema and its consortium will achieve this by:
- Characterizing different types of lignin to identify best candidates
- Testing lignin in membrane systems to identify best candidate
- Conducting complete tests including aging
- Conducting a pre-commercial demonstration
- Conducting cost evaluation and environmental life cycle analysis
Soprema’s brand new plant in Woodstock has been designed for producing more environmentally friendly building material. Commercialization of lignin-based roofing membranes perfectly suits the envisioned activities of this state-of-the-art plant.Access November 30, 2022 Project Update
FPInnovations has developed a process to modify lignin for application in waterproofing products. The process is flexible to different source lignins, with six modified lignins produced to date, containing a 20-40°C reduction in glass transition temperature compared to unmodified lignins. Evaluation of the technical performance of these samples as a partial replacement for bitumen in roofing products is now underway at Soprema.
Soprema has completed the preliminary evaluation of the technical performance of 9 different modified and unmodified lignin samples as a partial replacement for bitumen in roofing products. The lignins were tested at substitution rates of 2, 5 & 10%. The results of this evaluation show that lignin acts as a stiffening agent in the blend without having a negative impact on viscosity or low temperature flexibility at substitution rates up to 5%. As a result, some of the modified lignin samples could produce membranes in compliance with the CSA123.23-15 standard.