Page 17 - InnoRenew CoE International Conference 2020, Integrating Sustainability and Health in Buildings
P. 17
-emission optimized Cross Laminated Timber
Marko Kovačević1, Cornelia Rieder-Gradinger1, Christian Hansmann1,
Alfred Teischinger2, Ewald Srebotnik3
1 Competence Center for Wood Composites and Wood Chemistry – Wood K plus, m.kovacevic@wood-kplus.at
2 Institute of Wood Technology and Renewable Material, University of Natural Resources and Life Sciences (BOKU)
3 Institute of Chemical Engineering, Vienna University of Technology
Cross laminated timber (CLT) is one of the most popular engineered wood products. The main
species used for this product is spruce. To respond to the strongly increasing demand of CLT, it
will become necessary to also investigate additional raw material resources for its production.
Pine – having in mind its availability, mechanical properties and ability to grow even in regions
with poor growth conditions – could offer a high potential to serve as a new material for CLT
in the future.
The first phase of the study comprises the characterization and quantitative evaluation of VOC
emissions from spruce and pine in order to draw conclusions about the variability of VOC emissions.
A comparison of kiln-dried and green wood provided a sound basis for further investigations.
Furthermore, different CLT variants were tested in order to compare their emission levels.
The second phase covers the optimization of the CLT manufacturing process regarding VOC
emissions. Based on findings from the first phase, process parameters such as drying and gluing
as well as storage time were modified.
In the final project phase, long-term tests in model rooms constructed of different types of
CLT are being carried out, enabling evaluation of the influence of various building materials
regarding indoor air quality in reality-close scenarios.
Results showed a significant influence of drying temperature and drying time on VOC-emission
from pine. Additionally, the gluing step in CLT production as well as a combination of wood
species (pine, spruce) used resulted in a considerable VOC-reduction in the final product.
Keywords: cross-laminated timber, process parameters, VOC, pine wood, model room, indoor
air quality
INTEGRATING SUSTAINABILITY AND HEALTH IN BUILDINGS THROUGH RENEWABLE MATERIALS
17
Marko Kovačević1, Cornelia Rieder-Gradinger1, Christian Hansmann1,
Alfred Teischinger2, Ewald Srebotnik3
1 Competence Center for Wood Composites and Wood Chemistry – Wood K plus, m.kovacevic@wood-kplus.at
2 Institute of Wood Technology and Renewable Material, University of Natural Resources and Life Sciences (BOKU)
3 Institute of Chemical Engineering, Vienna University of Technology
Cross laminated timber (CLT) is one of the most popular engineered wood products. The main
species used for this product is spruce. To respond to the strongly increasing demand of CLT, it
will become necessary to also investigate additional raw material resources for its production.
Pine – having in mind its availability, mechanical properties and ability to grow even in regions
with poor growth conditions – could offer a high potential to serve as a new material for CLT
in the future.
The first phase of the study comprises the characterization and quantitative evaluation of VOC
emissions from spruce and pine in order to draw conclusions about the variability of VOC emissions.
A comparison of kiln-dried and green wood provided a sound basis for further investigations.
Furthermore, different CLT variants were tested in order to compare their emission levels.
The second phase covers the optimization of the CLT manufacturing process regarding VOC
emissions. Based on findings from the first phase, process parameters such as drying and gluing
as well as storage time were modified.
In the final project phase, long-term tests in model rooms constructed of different types of
CLT are being carried out, enabling evaluation of the influence of various building materials
regarding indoor air quality in reality-close scenarios.
Results showed a significant influence of drying temperature and drying time on VOC-emission
from pine. Additionally, the gluing step in CLT production as well as a combination of wood
species (pine, spruce) used resulted in a considerable VOC-reduction in the final product.
Keywords: cross-laminated timber, process parameters, VOC, pine wood, model room, indoor
air quality
INTEGRATING SUSTAINABILITY AND HEALTH IN BUILDINGS THROUGH RENEWABLE MATERIALS
17
