压缩预处理对全尺寸杨木含水率和力学性能的影响  

Effect of Compression Pre-treatment on Moisture Content and Mechanical Properties of Full-size Poplar Lumber

作　　者：赵欣[1,2] 赵有科[1,2] 吕建雄[1,2] 黄荣凤[1,2] 赵荣军[1,2] 任海青[1,2] 

机构地区：[1]中国林科院木材工业研究所 [2]国家林业局木材科学与技术重点实验室,北京100091

出　　处：《木材工业》2017年第1期19-22,45,共5页China Wood Industry

基　　金：国家林业局引进国际先进林业科学计划(“948”计划)“木材压缩预处理关键技术引进”(2011-4-19)

摘　　要：为解决木材气干时间长、易蓝变的问题,对高含水率、全尺寸杨木锯材进行压缩预处理。结果表明:采用40%的压缩率、经四次压缩后,两种规格试材的含水率从175%左右分别降至105%和109%,其中第一次压缩效果最明显,含水率降幅分别达48%和57%;压缩预处理对试材力学性能影响不显著。进一步验证了压缩预处理技术应用于工业化生产的可行性。To shorten air drying time and prevent blue stain for high moisture content（MC） wood,two dimensions of full-size Poplar lumbers were pre-treated using a compression device developing a 40%.compression ratio. After four compressing cycles,moisture content of the lumber samples reduced quickly from initial 175% to 105%~109%. It was observed that moisture contents declined dramatically by48%~57% following the first compression. Mechanical properties of the compressed lumber samples were tested. The results showed that the compression technique could be used in pre-treatment for full-size lumber drying.

关 键 词：杨木 锯材 全尺寸 压缩 预处理 含水率 力学性能 

分 类 号：TS652[轻工技术与工程]