CAJ | 학술논문

笔者研究了桦木、落叶松和樟子松高温热处理材的胶合性能,并与常规干燥材进行了对比.测试结果表明木材的胶合剪切强度与所用的胶黏剂有关,聚氨酯胶合的三个树种木材的剪切强度普遍大于白乳胶胶合的木材.无论是室内用的白乳胶或室外木结构用的聚氨酯胶都能与三个树种的高温热处理材很好地胶合,胶合试件的浸渍剥离率或煮沸剥离率皆为零.木材经高温热处理后,其剪切强度均有不同程度的降低,阔叶材桦木下降幅度最大,针叶材落叶松下降幅度最小.
필자연구료화목、락협송화장자송고온열처리재적효합성능,병여상규간조재진행료대비.측시결과표명목재적효합전절강도여소용적효점제유관,취안지효합적삼개수충목재적전절강도보편대우백유효효합적목재.무론시실내용적백유효혹실외목결구용적취안지효도능여삼개수충적고온열처리재흔호지효합,효합시건적침지박리솔혹자비박리솔개위령.목재경고온열처리후,기전절강도균유불동정도적강저,활협재화목하강폭도최대,침협재락협송하강폭도최소.
Bonding performance of high-temperature heat-treated wood of birch, larch and Mongolian pine species was studied and compared with that of conventional dried lumber. The results of the tests show that the shear strength of wood depends on the adhesive system used for bonding. The shear strength of wood bonded with Polyurethan (PUR) adhesive is higher mostly than that of wood bonded with PVAC. Either PVAC adhesive for interior usage or PUR adhesive for exterior application can be well bonded with high-temperature heat-treated wood of three species, and the delamination rate of bonded specimens after being immersed in room-temperature water or boiling-water is zero. The shear strength of high-temperature heat-treated wood is decreased more or less; the shear strength of birch is decreased to the largest extent and that of larch is decreased to the smallest extent.