|Introduction: (Report made by Claus Buhl Sørensen)
This report summarizes the knowledge and experience collected over the project with the rather heavy title:
Presentation and Documentation of a viable alternative to impregnated wood
The project is funded by Den Grønne Fondwhich hereby brought thanks.
The project was formulated at the invitation of Den Økologiske Have in Odder, and is carried out in a fruitful cooperation with all the garden staff.
The gardens action around Robinia is not completed with the submission of the report.
The products obtained through the project will for a long time be found in the garden where they will be part of the ongoing dissemination of the materials and products, the environmentally conscious consumer / garden-user can choose.
Signed task has been to describe the Robinia tree species and as a resource, including identification of those areas where it is technically and environmentally an alternative to both the impregnated wood and substitutes already (plastic and tropical wood).
For good measure, I do note that the opinions and attitudes towards the use of wood, which is expressed in the report alone is responsible for its own account.
Tingheden 9 June 1997
MSc in Forestry Claus Buhl Sorensen
Environmental concerns play an increasing role in the selection of materials and products we surround ourselves with. Virtually all types of products marketed in the environmentally friendly versions: automobiles, detergents and foods are all examples, although the products "environmentally friendly" features usually only comes from one or a few points in the product lifecycle.
Wood generally has a very low environmental impact as measured through its entire lifecycle. The exception is (pressure) treated wood, where - despite the fact that the impregnated wood may be harvested in sustainable forests - is an obvious problem regarding the disposal of waste products. This problem affects only the consumer who at one time must have invested in the product of pressure treated wood. In addition, a general doubt or suspicion to the impregnated environmental characteristics of products in use. The debate about the drawbacks of using pressure-treated wood is also largely driven by consumers.
Until now, the official response has been a reassessment of the preservatives used, and some drugs (Arsenic and Chromium) can now no longer used to impregnate wood. The annual inflow of pressure-treated wood is approx. 240,000 cubic meters - an amount roughly equivalent to the total production at Danish coniferous sawmills.
Virtually all the wood that is impregnated into Darrmark are Scotch pine imported primarily from the Nordic countries.
The outlet of treated wood is not known.
The purpose of this report is to demonstrate a viable alternative to the use of pressure-treated wood: Robinia pseudoacacia. Tree species differ from other alternatives (tropical wood and Western Red Cedar), by being grown (plantageart) in Europe is far from its natural range (North America).
Robinia is technically and qualitatively an excellent alternative to a wide range of products, which today usually made of pressure treated pine or various tropical woods.
The European felling of Robinia is limited, so Robinia can only be a complement to the Danish consumption of pressure-treated (forty) tree.
It is hoped that this report will not only lead to Robinia intoduceres on the Danish market, but that consumption of locust also will happen in those areas where the environmental impact would be greatest (the highest impregnation classes).
In addition to the thoughts, the report has about a more diversified use of wood, can lead to the impregnated wood is also attacked from the "easy" end - where waterproofing is only maybe required.
Remainder of the report can be obtained by mail by clicking the mail link -> firstname.lastname@example.org