2008-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/698732摘要：本計畫主要目標為改善木材從生材砍伐下來至木材到達氣乾狀態(含水率<19%)之乾燥過程品質，其中開裂是木材乾燥過程中最易產生的缺點，亦會影響製材之力學性質。除此之外，由於人造林木耐腐性較差，在古蹟與歷史建築修復現場常用防腐處理來增加其防腐防蟲的功效，因此防腐處理後對木材乾燥品質的影響亦為本計畫考量重點；又由於古蹟與歷史建築修復現場人造林木之品等挑選大都經由大木匠師或現場人員經由目視分等來判定其優劣，並未進行較客觀之科學性儀器進行非破壞檢測(NDT)，若木材內部有缺陷，經由目視分等來判定是不亦發現的，因此藉由目視分等配合科學性儀器(如超音波等)來判定木材乾燥過程中品等之優劣亦是本計畫考量重點之一。 本計畫構想在木材乾燥過程中對木材進行預裂處理(日本工法稱為背割)來減少木材開裂現象，後續分別探討對木材乾燥品質(天然乾燥與人工乾燥)、製材品等、防腐劑吸收量以及力學性質(包含非破壞與破壞試驗)之影響。 <br> Abstract: The objects of this study are to investigate the effects of pre-checking on the dry quality and mechanical properties of wood used for the restoration of listed historical buildings in Taiwan. The wood specimens made from China fir (Cunninghamia lancelata) and Japanese cedar (Cryptomeria japonica) would be used in the study. The wood specimens will first be longitudinally pre-checked with a width of 0.3 mm and a depth of 1/3 – 1/2 diameters. After pre-checking processing, some wood specimens will be treated with ACQ preservative. Then, the dry velocity and dry quality according to related CNS standards will be investigated. For the effects of pre-checking on the mechanical properties of tested wood specimens, non-destructive and destructive testing methods will be conducted. The results will provide basic and practical information for future research, processing, and utilization of domestic wood species used for the restoration of listed historical buildings in Taiwan.預裂天然乾燥人工乾燥ACQ處理製材分等Pre-checkingnatural dryingartificial dryACQ treatmentgrading