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Working Group 2: IMPACTS COST ACTION E22: Environmental optimisation of wood protection Scope: Risk assessment, optimum bio-effective life, remediation and wood wastes Waste wood – inventory of contaminants (SP) Waste wood is presently used as fuel in power plants in Sweden. Decisive for the use of waste wood as fuel is to what extent it is contaminated with wood preservatives, paint, plastics (PVC), metals (e.g. fasteners) etc. Some contaminants constitute a problem from a mechanical point of view, e.g. glass, nails and screws, whereas other contaminants can cause fouling and corrosion of the incinerators. Heavy metals in preservativetreated and painted wood, such as lead, zinc, copper and chromium as well as arsenic, can cause environmental problems (emissions) if not properly controlled. SP is presently carrying out a survey of possible contaminants in waste wood of mainly Swedish origin. As considerable amounts are imported from Germany, The Netherlands and Baltic states the survey has been extended to these countries as well. The main difference between waste wood of Swedish origin and imported waste wood is expected to be the potential contents of residues from wood preservatives. The survey will be completed towards the end of 2000. Contact person: Mr Jöran Jermer E-mail: joran.jermer@sp.se Environmental impact from building materials as influenced by durability and service life (KTH) It is today widely adopted that an environmental assessment of building materials must take into account the entire life cycle ”from cradle to grave”. In many cases measures are taken in the production phase which may lead to undesired impact on the environment but which on the other hand increase the durability and service life significantly. One example is the treatment of wood with chemicals of different types. Other examples are zinc or plastic coated steel and concrete with increased cement content or with additives. The project aims to a systematic study of the environmental impact of treatments in the production phase in a service life perspective. It contains one methodological part and a number of applications. One of these is treated wood and a case under focus may be the project “Deterioration of wood - a case study of a traffic sound barrier”. The project is in its initial stage performed in co-operation with the Swedish Institute for Wood Technological Research and the Swedish University of Agricultural Sciences. Later on the intention is to include the cement and steel industries in the project. 166
Contact person: Prof. Kai Ödeen E-mail: kai@bim.kth.se COST ACTION E22: Environmental optimisation of wood protection “Wood Pole”- Creosote treated poles (SLU) This EU-project has the aim to develop procedures to treat poles by creosote to relevant retention levels without bleeding. Contact person: Dr Östen Bergman E-mail: Osten.Bergman@trv.slu.se Environmental declarations for preservative-treated wood (STI) The aim of this project is to prepare environmental declarations for preservative-treated wood (with different preservatives) which comply with an agreed format for building materials. Contact person: Mr Magnus Estberg E-mail: sw.woodpreservation.institute@stockholm.mail.telia.com Working Group 3: INNOVATIONS Scope: Application of modified wood, heat treatment, insect growth regulators, new biocides, non-biocidal treatments, resins and oils “Chemowood” - Process development and technological evaluation of final products based on new methods for chemical modification of solid wood (CTH). Chemowood in an EU-project with the aim to study five methods for chemical “modification” of wood. The following agents for wood modification are included: NMA, Succinic anhydride, UZA (also called LBA, linseed based anhydride), MG-solution and furfuryl alcohol. Chalmers role in the project is: A. Process development of wood modification with furfuryl alcohol B. Part of the biological testing (in collaboration with the Swedish University of Agricultural Sciences) of wood modified with all 5 types of modification. C. Mechanical and dimensional stability testing of wood modified with all 5 types of modification. 167
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