胶黏剂和指接接头对胶合木性能的影响  

Influence of Adhesive Type and Finger Joint on Properties of Glulam

作　　者：周海宾[1] 刘晓娜[1] 韩刘杨 金银慧 朱建伟 

机构地区：[1]中国林业科学研究院木材工业研究所,北京100091 [2]内蒙古大兴安岭林业科学技术研究所,内蒙古牙克石022150

出　　处：《建筑材料学报》2017年第5期752-757,共6页Journal of Building Materials

基　　金：结构用胶合木产品质量控制技术引进项目(2014-4-42)

摘　　要：采用单组分聚氨酯(PUR),A型双组分异氰酸酯(MDI-A),B型双组分异氰酸酯(MDI-B)和间苯二酚(PRF)4种结构胶黏剂,相邻层板接头距离分别设为0,50,150,300mm以及仅在最下面两层板间距离为50mm的5种指接接头分布模式,制作成以兴安落叶松和日本落叶松为原材料的胶合木试样,并按照标准进行胶层剪切试验、剥离试验和足尺抗弯试验,以探究胶合木层积用胶黏剂对胶合面胶合性能的影响,以及层积方向上相邻层指接接头分布对胶合木抗弯破坏行为的影响.结果表明:4种结构胶黏剂中,PRF胶合性能最优;层间接头分布距离为300mm时,抗弯试验中指接接头的破坏几率最低.The effects of different adhesive types on the bonding property and the finger-joint distribution between adjacent laminates on the flexural behavior of glulam using Chinese larch and Japanese larch wood were studied.The four adhesives including one-component polyurethane adhesive（PUR）,type A two-component isocyanate adhesive（MDI-A）,type B two-component isocyanate adhesive（MDI-B）and two-component phenol resorcinol formaldehyde（PRF）were respectively applied and the finger-joint distributions between adjacent laminates with 0,50,150,300 mm or 50 mm only in lower two laminates were designed.The resin layer shear test,the resin layer peeling test and the full-scale bending test were conducted according to standards.The results show that the bonding performance of PRF is better than other adhesives and the failure probability of the finger joint is lowest in the bending test when the finger-joint distribution is 300 mm.

关 键 词：胶合木 胶黏剂 胶合性能 指接接头 

分 类 号：TU531.2[建筑科学—建筑技术科学]