Dong, W;
Rose, CM;
Stegemann, JA;
(2024)
Cross-Laminated secondary Timber: Validation of non-destructive Assessment of structural properties by full-scale bending tests.
Engineering Structures
, 298
, Article 117029. 10.1016/j.engstruct.2023.117029.
(In press).
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Abstract
The demolition of buildings creates a vast quantity of secondary timber, which is currently chipped, downcycled or incinerated. This study examines a higher value use of secondary timber as lamellae for cross-laminated timber (CLT), which will address the increasing demand for wood products that is expected in the coming decades. The longitudinal vibration test method was used to determine the dynamic modulus of elasticity (dMoE) for secondary timber. Then, four-point bending tests were conducted for the secondary timber to obtain the static modulus of elasticity (sMoE) and modulus of rupture (MoR). The test results showed a good linear relationship between dMoE and sMoE, so the dMoE results could be used to predict sMoE of secondary timber. Furthermore, the static bending stiffness of cross-laminated secondary timber (CLST), sMoECL, was predicted by the dMoE from transverse vibration tests of CLST and longitudinal vibration tests of secondary timber. Four-point bending tests of CLST showed that the latter predicted sMoECL more accurately. CLST panels were also found to meet the structural requirements in relevant standards. Finally, analytical models were used to predict the bending stiffness and strength of CLST. The closest prediction came from combining the shear analogy method and bearing model for CLT. This paper demonstrates the feasibility of using secondary timber as a feedstock for CLT/CLST production.
| Type: | Article |
|---|---|
| Title: | Cross-Laminated secondary Timber: Validation of non-destructive Assessment of structural properties by full-scale bending tests |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.engstruct.2023.117029 |
| Publisher version: | http://dx.doi.org/10.1016/j.engstruct.2023.117029 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Bending strength; circular economy; mass timber; non-destructive testing; 26 recovered timber; wood waste |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10185231 |
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