林业工程学报2016，Vol.1Issue(6)：34-38,5.DOI:10.13360/j.issn.2096-1359.2016.06.006
胶液含量对单板条层积材柱构件性能的影响
Effects of resin content on properties of parallel strand lumber columns
摘要
Abstract
Parallel strand lumbers ( PSLs) were manufactured from fast⁃growing poplar ( Populus spp.) veneer strand impregnated in various mass ratio(10%, 20% and 30%) of phenol⁃formaldehyde (PF) adhesive using hot⁃pressing. The heat transfer performances during hot⁃pressing and axial compressive properties of PSL specimens were examined. The results showed that the moisture content and resin impregnation amount of strand increased with the increasing mass ratio of PF adhesive. The hot⁃pressing heat transfer curve of PSLs included the initial temperature fast rising stage and temper⁃ature slow rising stage, and the heat transfer speed increased with the increasing resin impregnation amount of strand. The axial compressive properties of PSLs columns increased with the increase of resin impregnation amount of strand. Group A, which was impregnated with 10% PF, had the lowest mechanical properties. The initial modulus of elasticity of Groups B and C, which was impregnated with 20% and 30% PF, respectively, were 8.41% and 15.77% higher than that of Group A. The critical stress of Groups B and C were 31.03% and 36.98% higher than that of Group A. Different groups of PSL columns specimens had different failure modes under the axial compression. The dominant failure mode of Group A was separation due to the low adhesive coverage, while the dominant failure modes of Groups B and C were that minor crack( s) occurred in the end of PSL columns specimens. The PSL manufactured from poplar veneer strand im⁃pregnated with 20% PF adhesive had better physical and mechanical properties based on the comprehensive considera⁃tion.关键词
杨木/单板条层积材(PSL)/胶液质量分数/热压温度传递/轴心抗压性能Key words
Populus euramericana cv. ‘I-214’/parallel strand lumber(PSL)/resin mass ratio/hot-pressing heat transfer/axial compression performance分类
农业科技引用本文复制引用
王志强,王转转,赵丹,那斌,卢晓宁..胶液含量对单板条层积材柱构件性能的影响[J].林业工程学报,2016,1(6):34-38,5.基金项目
“十二五”国家科技支撑计划（2015BAL03B03）。 （）
