CELLUWOOD ( “Laminated Strong Eco-Material for Building Construction Made of Cellulose-Strengthened Wood - Final Outcomes”) is a four years EU project, funded under the Eco Innovation research initiative. The project aims to develop a new range of structural elements made of wood by introducing innovative production elements and includes the use of cellulose instead of petroleum-based glue in the lamination of the timber products. The ‘physical’ results will be the strong eco-beams and columns and their most sustainable manufacturing technologies, in addition to significant environmental and cost benefits of the innovation. These are achieved by the introduction of the (new) technologies from other sectors (e.g. cellulose velvet, biocomposite reinforcement and bio-resin) for innovative uses in the defect removal and repairing, facilitating innovation in the use of nano/micro cellulose and bio-resin technologies in timber reengineering, and the development, testing and demonstration of the novel initiative products.
The CELLUWOOD products include strong glulam Eco-beams and columns manufactured by using bio-based lignin resins and nanocellulose enhanced glue systems. Both innovative building products provide significant environmental benefits.
Coordinator and responsible of the project at AIDIMA: Miguel Ángel Abián
In the case of AIDIMA, this project is co-funded by IVACE (Instituto Valenciano de Competitividad Empresarial) and by the European Regional Development Fund (ERDF).
Previously, in WP7 some lignin, PUR and MUF beams where manufactured at
TECNIFUSTA for interim testing. Those interim tests led to changes in the
formulation of the lignin resin by CHIMAR in order to achieve a satisfactory and
effective final resin.
In 2014, 20 complete beams (nominal dimensions: 120 x 120 x 2200 mm) were
manufactured at TECNIFUSTA in collaboration with CHIMAR and AIDIMA:
• 10 beams with their lamellae glued by the final lignin resin developed in the
project (CELLUWOOD beams).
• 10 beams with their lamellae glued by commercial PUR.
All lamellae were made of timber classified as C24.
10 commercial beams (nominal dimensions: 120 x 120 x 2200 mm) made with MUF
resin were used in order to compare strength and behaviour with the other 20 beams.
The commercial beams are classified as GL24h.
All beams were made of Picea abies wood.
Measurement of the moisture content of timber
Preparation of the lignin resin for its
Beam 7 (moisture content: 11.1%; dimensions: 120 x 123 x 2108 mm).
Beam 7 (lignin
MOR (N/mm2) Classification
1st glue line 5,896 14,624 40.4 C40
2nd glue line 5,879 14,517 39.9 C35
1st lamella 5,828 14,201 38.7 C35
2nd lamella 5,930 14,839 41.2 C40
3rd lamella 5,651 13,086 34.3 C30
Good results (good quality timber), and good glue lines.
We need to analyze the results in more detail.
DESTRUCTIVE TESTS ACCORDING TO EN 408
EN 408:2011+A1:2012 Timber structures – Structural timber and glued laminated timber
– Determination of some physical and mechanical properties specifies test methods for
determining most of the strength and stiffness properties of structural and glued
Section 10. Determination of global modulus of elasticity in bending
Section 19. Determination of bending strength