木材含水率测定方法的比较研究

为修订国家标准“CB1931—80木材含水率测定方法”提供依据,本文对含树脂和挥发性物质较多的马尾松等5种木材,采用烘干法、真空干燥法和蒸馏法进行含水率测定的比较。结果表明,烘干法简便实用,但所测得的含水率结果比真空干燥法和蒸馏法为高,如果试样含有较多的挥发性物质,应用烘干法测定含水率误差偏大时,可采用真空干燥法。

The comparison research of the methods for determination of moisture content of wood

To give evidence of modifing the state standard "GB 1931-80 method for determination of moisture Content of wood", in this paper the comparisons of determination for moisture conteht of 5 wood species, such as Pings rnassoniana, which contain higher gum resin and volatile constituents, have been-made with oven drying, vacuum drying and destructive distillation, The results show that the oven dryiag method is simply and practical, but the determined moisture content values is higher than the others If the samples contain higher volatile constituents, the error of moisture content determined by the oven drying method is larger, vacuum drying method can be used