直交集成柳杉地板之物理與機械性質評估

Evaluation on the Physical and Mechanical Properties of Japanese Cedar Cross-laminated Timber Flooring

林志憲(Chih-Hsein Lin) ； 李佳如(Chia-Ju Lee) ； 楊德新(Te-Hsin Yang)

《林產工業》 34卷1期 (2015/03) Pp. 1-10

https://doi.org/10.6561/FPI.2015.34(1).1

摘要

直交式集成材是一種板狀結構之工程木材，本研究利用柳杉造林木研製三層結構之直交式集成材，同時探討各項物理與機械性質，評估其作為地板之性能。柳杉集成元之非破壞性試驗結果顯示，以超音波法與打音法試驗所得之動彈性模數雖有稍高於抗彎彈性模數之趨勢，但兩者相關性佳，其R^2為0.89-0.95，同時隨集成元等級提高，其差異有降低之趨勢。兩種非破壞法以打音法較佳，透過打音法進行動彈性模數之評估，可有效且經濟的進行集成元彈性模數之分等。以非甲醛系之膠合劑樹脂進行進行直交式集成柳杉地板之研製，經浸水剝離試驗與煮沸剝離試驗結果顯示膠合層並無剝離。尺寸安定性方面，直交式設計亦使得直交式集成柳杉地板之寬度方向的尺寸收縮與膨潤受到抑制。在機械性質方面，直交式集成柳杉地板經板類振動法試驗結果，其E/G比約僅8.4，經直交設計結果，直交式集成柳杉地板之動彈性模數與抗彎彈性模數相近，約7.1-7.2 GPa，抗彎強度則為56.1 MPa。

關鍵字

直交集成地板 ； 柳杉 ； 非破壞性試驗 ； 板類振動法

並列摘要

Cross-laminated timber (CLT) is a panel-shaped engineered wood product, this study involved testing of the physical and mechanical properties of three-layered CLT made from plantation Japanese cedar (Cryptomeria japonica) wood. In addition, the feasibility study of CLT used as the composite flooring material was also investigated. The experimental results indicated that the value of the DMOE was slightly higher than that of the MOE, and there were good relationships between the DMOE (DMOEu and DMOEt) and MOE of the Japanese cedar laminae. The R^2 values were found to be 0.89 (DMOEu and MOE) and 0.95 (DMOEt and MOE), respectively. It also indicated that tap tone method was a better way to determine MOE of laminae. After the soaking and boiling delaminating tests, no delamination was found in the glue line of CLT. Well dimensional stability of CLT was also found due to cross-laminated design. Moreover, the E/G value of CLT, measured by plate vibration method, was only 8.4. Furthermore, the DMOE, MOE and MOR of CLT were 7.1-7.2 GPa and 56.1 MPa.

並列關鍵字

Cross-laminated timber flooring ； Japanese cedar ； Nondestructive testing ； Plate vibration method