Relationship of Longitudinal Permeability to Treatability of Wood

Abstract

The permeabilities of sapwood and heartwood of twelve species representing different kinds of wood were determined using 1. water on never-dried/saturated and on previously-dried/resaturated specimens, and 2. nitrogen gas at mean pressure of 2.5 atm and at infinite pressure. Also, their effective permeabilities to water were determined. These specimens were subsequently treated with copper sulfate, and their matched specimens with creosote. The sapwood showed much higher mean permeability and treatability values than the heartwood. The permeability to water was found to be much higher with specimens which had been previously-dried/resaturated than with those which had not been dried. High degrees of correlation between various permeability and treatability values were obtained. When the relationship between permeability and treatability was analysed by species group, higher correlations were obtained in the hardwoods than in the softwoods. Among the hardwoods, the semi-ring porous woods show no correlation, probably because they were all moderately permeable. © 1976, Walter de Gruyter. All rights reserved.

Source or Periodical Title

Holzforschung

ISSN

183830

Page

91-96

Document Type

Article

Subject

Aufnahmefähigkeit, Copper Sulfate, Creosote, Hardwood, Heartwood, Kernholz, Kreosot, Kupfersulfat, Laubhölzer, Nadelhölzer, Permeability, Permeabilität, Sapwood, Softwood, Splintholz, Treatability

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