Treatment of wood with siloxanes and metal micro-particle deposition using plasma technology
Treatment of wood with siloxanes and metal micro-particle deposition using plasma technology

Author: Patricia Gascón-Garrido

Publisher: Cuvillier Verlag

Published: 2017-10-06

Total Pages: 140

ISBN-13: 3736986211

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Plasma treatment is a novel and promising technolgy in the field of wood surface modification. Deposition of micro-particles on wood surfaces by means of plasma is an interesting approach to enhance wood properties and thus, to extend the service life of wood products. On the other hand, several silicone fomulations have been already shown to cause excellent water repellence and interaction with cell wall components, beside to impart high chenical and weathering stability as well as biological resistance in treated wood. Based on that, this study focussed on both treatments seperately in an initial stage of the research; followed by the combination, in a two-step treatment, of vacuum-pressure impregnation of solid wook with siloxanes and additional copper deposition on wood surface using atmostpheric pressure plasma.

Assessing the Shelf Life Attributes of Mountain Pine Beetle-killed Trees
Assessing the Shelf Life Attributes of Mountain Pine Beetle-killed Trees

Author: S. Magnussen

Publisher:

Published: 2009

Total Pages: 34

ISBN-13:

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In 2006, a total of 360 lodgepole pine trees were destructively sampled from 45 sites that had been killed by mountain pine beetle (Dendroctonous ponderosae Hopk.). The trees were sampled from the Sub Boreal Spruce (SBS) Biogeoclimatic zone within north central British Columbia. The trees were distributed evenly across the geographic areas as well as across a sample matrix that included three classes of time since death, three classes of diameter at breast height, and three classes of soil moisture regime. A previous report described the procedures used to the collect the data and summarized the data collected for each of the sample trees. The current study analyzes the data and presents a detailed assessment of the changes in the wood quality attributes of mountain pine beetle-killed trees that occur within 5 years since death.--Includes text from document.

Proposed Protocol for Evaluating Potential Strength-reducing Characteristics in Lumber After a Catastrophic Event
Proposed Protocol for Evaluating Potential Strength-reducing Characteristics in Lumber After a Catastrophic Event

Author: Conroy Lum

Publisher:

Published: 2009

Total Pages: 20

ISBN-13:

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The objective of this study is to develop a protocol for evaluating and responding to potential strength-reducing characteristics that develop in lumber from stands following a regional catastrophic event. This new protocol is intended to be distinct from the standardized lumber testing programs that are in place to support the development of structural design values. Under this two-year project, a general protocol has been drafted and a limited pilot study was undertaken to demonstrate its efficacy by using shake in post mountain pine beetle (MPB)-killed lodgepole pine lumber as an example. This protocol provides guidance on the identification of suitable characteristics for study, the design of an exploratory survey for assessing frequency of appearance, the approach for collecting samples for strength testing, the analysis of the test results, and, if necessary, the development of supplementary grading rules to respond to possible impacts to the lumber strength from these characteristics.--Document.

Addressing Marketplace Durability Issues with Post-mountain Pine Beetle Lodgepole Pine
Addressing Marketplace Durability Issues with Post-mountain Pine Beetle Lodgepole Pine

Author: Anthony Byrne

Publisher:

Published: 2005

Total Pages: 52

ISBN-13:

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This is a compilation of three reports addressing market durability issues with products made from lodgepole pine that has been affected by mountain pine beetle (MPB) infestation. The first report describes the establishment of accelerated field tests to determine the decay resistance of blue-stained post-MPB lodgepole pine sapwood and non-stained sapwood with reference samples of Scots pine sapwood. The second is a comparative technical review of the nature of blue stain in post-MPB wood and the differences between blue stain, mould, and decay. The final report answers frequently asked questions about blue stain on Canadian wood products, including whether it affects construction-related properties.