Relation of transverse compression properties and the degree of brown rot biodeterioration of Pinus glabra in the soil block test
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Steve Janzen
Abstract
Improved methods are needed for detecting and quantifying the effect of decay fungi on wood products. The focus of the present paper is a soil block decay test with exposure to the brown rot fungus Gloeophyllumtrabeum, where the changes in elasticity and strength were compared in both the radial and tangential directions as a function of the decay degree. The stress-strain analysis was employed by a transverse compression (transC) testing technique in which a load was applied over the specimen’s tangential or radial surface. It was found that early effects of decay were detected in either direction of loading, but the overall reduction in elasticity and compression strength after 7 days of exposure to the fungus was approximately two times greater in the radial direction. This difference is interpreted that decay occurs mainly in the earlywood (EW). Significant strength loss at 5% compression was detected after 2 days of exposure to the fungus. However, 3 days of exposure was required before significant strength loss was evident as a result of the reduction in modulus of elasticity (MOE) or mass loss (ML). In comparison to ML, the compression strength loss was found to be a more sensitive measure of wood decay.
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©2016 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Original Articles
- Preparation of prehydrolysis-TMPs with different severity factors and analysis of the pulps and byproducts
- Differences in solubility parameters and susceptibility to salting-out between softwood and hardwood lignosulfonates
- Modified sodium lignosulfonates (NaLS) with straight chain alcohols and their aggregation behavior and adsorption characteristics on solid surfaces
- Improved impregnation efficiency and pulp yield of softwood kraft pulp by high effective alkali charge in the impregnation stage
- Semitransparent, durable superhydrophobic polydimethylsiloxane/SiO2 nanocomposite coatings on varnished wood
- Comparative study of the topochemistry on delignification of Japanese beech (Fagus crenata) in subcritical phenol and subcritical water
- Characterisation of Postia placenta colonisation during 36 weeks in acetylated southern yellow pine sapwood at three acetylation levels including genomic DNA and gene expression quantification of the fungus
- Relation of transverse compression properties and the degree of brown rot biodeterioration of Pinus glabra in the soil block test
- Four-point bending strength of key-hole side-edge-notched western hemlock (Tsuga heterophylla) wood
- Determination of the elasto-plastic material characteristics of Norway spruce and European beech wood by experimental and numerical analyses
- Time dependence of the orthotropic compression Young’s moduli and Poisson’s ratios of Chinese fir wood
Articles in the same Issue
- Frontmatter
- Original Articles
- Preparation of prehydrolysis-TMPs with different severity factors and analysis of the pulps and byproducts
- Differences in solubility parameters and susceptibility to salting-out between softwood and hardwood lignosulfonates
- Modified sodium lignosulfonates (NaLS) with straight chain alcohols and their aggregation behavior and adsorption characteristics on solid surfaces
- Improved impregnation efficiency and pulp yield of softwood kraft pulp by high effective alkali charge in the impregnation stage
- Semitransparent, durable superhydrophobic polydimethylsiloxane/SiO2 nanocomposite coatings on varnished wood
- Comparative study of the topochemistry on delignification of Japanese beech (Fagus crenata) in subcritical phenol and subcritical water
- Characterisation of Postia placenta colonisation during 36 weeks in acetylated southern yellow pine sapwood at three acetylation levels including genomic DNA and gene expression quantification of the fungus
- Relation of transverse compression properties and the degree of brown rot biodeterioration of Pinus glabra in the soil block test
- Four-point bending strength of key-hole side-edge-notched western hemlock (Tsuga heterophylla) wood
- Determination of the elasto-plastic material characteristics of Norway spruce and European beech wood by experimental and numerical analyses
- Time dependence of the orthotropic compression Young’s moduli and Poisson’s ratios of Chinese fir wood
