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The Embedment Behavior of Acetylated and Unmodified Birch Plywood
The outstanding mechanical properties of birch plywood make it promising to be applied for structural purposes. However, the poor durability of birch against biodeterioration limits its outdoor uses. Chemical modification, e.g., acetylation, is one of the potent ways to mitigate the durability issues. Embedment strength is one of the main parameters that affect the strength of timber connection. This paper reveals the embedment behavior of both acetylated and unmodified birch plywood. Specifically, embedment tests are conducted on acetylated and unmodified birch plywood at three different angles, i.e., 0° (parallel), 45°, and 90°(perpendicular) to the face grain. The test results show that the embedment stiffness and strength of acetylated birch plywood exhibit slight angle-dependence, while for the unmodified specimens the influence of the load-to-face grain angle on the embedment stiffness and strength is less pronounced. Moreover, acetylated birch plywood specimens show higher embedment strength than unmodified ones at all angles to the face grain, which could be attributed to the enhanced density and reduced moisture content induced by the acetylation process. Lastly, the characteristic embedment strength predicted by using the formula in Eurocode 5 is compared with the one derived from the test results. ; QC 20220603
The Embedment Behavior of Acetylated and Unmodified Birch Plywood
The outstanding mechanical properties of birch plywood make it promising to be applied for structural purposes. However, the poor durability of birch against biodeterioration limits its outdoor uses. Chemical modification, e.g., acetylation, is one of the potent ways to mitigate the durability issues. Embedment strength is one of the main parameters that affect the strength of timber connection. This paper reveals the embedment behavior of both acetylated and unmodified birch plywood. Specifically, embedment tests are conducted on acetylated and unmodified birch plywood at three different angles, i.e., 0° (parallel), 45°, and 90°(perpendicular) to the face grain. The test results show that the embedment stiffness and strength of acetylated birch plywood exhibit slight angle-dependence, while for the unmodified specimens the influence of the load-to-face grain angle on the embedment stiffness and strength is less pronounced. Moreover, acetylated birch plywood specimens show higher embedment strength than unmodified ones at all angles to the face grain, which could be attributed to the enhanced density and reduced moisture content induced by the acetylation process. Lastly, the characteristic embedment strength predicted by using the formula in Eurocode 5 is compared with the one derived from the test results. ; QC 20220603
The Embedment Behavior of Acetylated and Unmodified Birch Plywood
Wang, Tianxiang (author) / Wang, Yue (author) / Crocetti, Roberto (author) / Wålinder, Magnus (author)
2022-01-01
Conference paper
Electronic Resource
English
DDC:
690
Spherical Dome of Laminated Birch Plywood, Finland
| British Library Online Contents | 2000