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Information from the COIPM Wood Group. Summary received via Mme Dr Anna Gambetta (Italy)
1987 - IRG/WP 4139
Two co-operative programmes were discussed: 1) The IRG/COIPM co-operative programme on the CCA/CCB wood treatments and 2) The IRG/COIPM co-operative programme for testing the resistance of plastic wrapping for wooden pilings. The following was reported: In the wood treatment programme, beech, pine and alstonia wood samples have been pressure treated with 3 retentions (3%, 6% and 10%) of CCA and CCB and exposed in the sea, to find out if these timbers have selective resistance to attacks by marine borers and fungi. After nearly 8 years of exposure at many different locations it is becoming apparent that both treatments in pine and alstonia provide better protection than both treatments in beech. It is hoped to find out after chemical analysis why this is happening. In the polyolefin tests this plastic material was heat shrunk around small wooden blocks and exposed to borer attack in many different marine environments, and also in some terrestrial environments where termites were present, to determine if the material prevents attack by the borers. At two stations the test is now in its eighth year. So far the polyolefin material is still intact and has not been penetrated by borers. These two programmes are continuing.
J R DePalma
Information from COIPM Wood Group
1985 - IRG/WP 4120
During the last COIPM Meeting (which took place in Athens, Greece in September 1984) the Wood Group met and discussed the co-operative work 'Durability in sea-water of wood with plastic wraps and wood treated with polymere'.
Information from the Wood Group of COIPM
1982 - IRG/WP 494
Status of the Working Group on Preservation of Wood in the Marine Environment - Questionnaire results
1977 - IRG/WP 434
At the joint meeting of the IRG and COIPM dealing with preservation of wood in the marine environment, it was suggested that a Marine Group should be formally recognised within IRG. It was agreed that a questionnaire (Document No: IRG/WP/424) should be circulated to determine the views of the membership on the future status of this group. The results of this questionnaire are presented.
R A Eaton
Information from the COIPM Wood Group
1986 - IRG/WP 4130
The Chairman outlined the progress of the co-operative work "testing the resistance to marine borers of heat shrinkable polyolefin sheathings and of wood treated by vacuum/pressure with polymers (polystyrene)". The first part of the work has been started: the samples of wood wrapped with shrinkable polyolefin sheathings have been prepared and sent to the stations participating. The second part of the programme has for the moment been stopped because in some preliminary trials samples treated with polystyrene have shown a light to moderate attack by molluscan and crustacean borers after 18 months' immersion. The results of these trials have been related and supported by photos and X-ray pictures. Four other stations are involved in this programme: three have been made available by Hempel Technology in Copenhagen (Denmark) and one by CNEXO (France). A presentation was given of the project for a European Standard "Field test method for determining the protective effectiveness of a preservative in the marine environment" which had been prepared by Professor Björn Henningsson (Sweden) and considered in the CEN meeting in September 1985. The participants were informed of the research being carried out by the IRG Marine Wood Preservation Group and the minutes of the 12th Meeting held in Brazil during May 1985 were presented.
Information from the COIPM Wood Group
1988 - IRG/WP 4146
Abstract from the COIPM minutes: Wood in marine environment: Mrs Gambetta stated that the main item discussed by the Group was the collaborative work to test the durability of heat shrinkable polyolephin sheating materials for the protection of wood against marine organisms. The work began last year when wood samples were sent out to the participants. Three samples of Pinus sylvestris wrapped in polyolephin supplied by Raychem were sent to the following participants: Mr. RASMUSSEN who put three stations at the disposal of the group: one in Denmark, one in Spain and one in India; Prof. RELINI with two stations: Rapallo and Loano in the Gulf of Genoa; Prof. GARETH JONES: Langstone station in England; Dr. GUEZENNEC: Tahiti Station; Dr. GAMBETTA and Dr. ORLANDI: Follonica station (Tyrrhenian Sea). The information regarding the physical and chemical characteristics of the stations as well as the most damaging marine organisms has been recived. The inspections regarding good or poor condition of samples have not yet been made but those in charge of the test would send the results as soon as possible. Dr. HABAL is also going to take part in the work and the samples would be sent out to him for exposure at his station. There was a second part in the collaborative programme: a study on the resistance to marine organisms of pressure treated wood with polymers. The tests with styrene are being undertaken. Preliminary tests were made at Follonica station but the bad results achieved prevented the group from extending the trials to other stations. The second item dealt with was the IRG/COIPM cooperative programmes. The first one regards different species of wood treated with CCA and CCB (Pinus, Alstonia, Fagus). The work already started nine years ago. Now it can be said that the two saline products gave results somewhat similar and chemical analyses have shown that Boron and Arsenic had a strong leaching therefore seems that a better protection is ensured by copper and chromium. The second one aims at studying the efficacy of polyurethane coatings on wood samples against marine organisms. The group also discussed the work in progress in the various member laboratories. Dr. HABAL informed on his tests on the behaviour of wood samples treated with TBTO and TBTF and also on the incorporation of antifouling materials into elastic paint like commercial preparation that can be applied as a thick layer onto wood pilings. He was also participating in the heat shrinkable plastic cooperative programme. Mr. DE PALMA was continuing his tests on polyolephin sheatings at his two stations and at other stations: Italy, Spain, India (stations of Follonica and Cadiz). He was also taking part in the IRG/COIPM collaborative programmes. Dr. GAMBETTA reported her tests carried out at Follonica on wood treated with organotins which were exposed in the marine environment during twelve years. She was also taking part in the IRG/COIPM cooperative programmes.
Information from the COIPM wood group. (With Appendix: Préserver les matériaux en milieu marin sauvegarder l'environment marin telles sont la vocation et la mission du C.O.I.P.M.)
1989 - IRG/WP 4156
During the last COIPM Meeting, up to date information on cooperative work to test the resistance of plastic wrapping for pilings were submitted and discussed. In 1986 untreated wood samples wrapped with shrinkable polyolefin sleeves were submerged in 9 stations, situated in temperate and tropical waters. After 1 or 2 years of immersion the samples showed no sign of penetration by marine borers and the surface of wraps was intact. The samples showed moderate to extensive fouling on their surface The control samples in Mediterranean Sea were destroyed within a year. The degree of attack by marine borers and the characteristics of the sites (temperature, salinity, pH) are reported in Tab.1. A study on the biodegradation of waterlogged archeological woods from a 2,500 year old shipwrech was presented. The shipwrech, probably a Greek merchant boat, was detected many years ago near the Isola del Giglio in Tyrrhenian Sea and partly brouht up. The wood samples recovered belong to the ship-planking and to some tools and instrumets, even musical instruments such as flutes. The woods show a severe marine borer attack. At the moment the wood specimens are preserved in water with a fungicide solution. The various decay patterns of the cell wall were illustrated by photos and dias. This study is carried out by Wood Institute of Florence in collaboration with the Archaeological Museum and includes the identification of wood species (three sofwoods and ten hardwoods), their biodegradation and the conservation treatments. A classification on the wood natural resistance against marine borers in Mediterranean Sea and in temperate waters was discussed. This classification was prepared by the Chairman for the Working Group 2 "Natural durability" of CEN/TC 38.
The status of the Working group on Preservation of Wood in the Marine Environment
1977 - IRG/WP 424
At the last joint meeting of IRG/COIPM members in May 1976 at Wildhaus, Switzerland, a proposal was made that the existing 'Marine Group' should become a formal part of IRG. At present, members of the Wood Group of the COIPM (Comite International Permanent pour la Recherche sur la Preservation des Materiaux en Milieu Marin), and members of IRG who are interested in wood preservation problems in the sea meet jointly as an informal fourth working group within IRG. I have been asked by members of this group to circulate a questionnaire in order to test the general feeling of all IRG members about this matter.
R A Eaton
Working Group I Sub-group 5 'Insects in dry wood'. Plan for data sheets
1982 - IRG/WP 1173
Testing of wood preservatives against marine borers (Part 1). Method of testing wood preservatives against marine borers (Part 2)
1971 - IRG/WP 37
P C Trussell, C C Walden
The International Research Group on Wood Preservation. A Short Presentation
1979 - IRG/WP 92
The Seventeenth Report of The International Research Group on Wood Preservation 1987-1988
1988 - IRG/WP 5322
Co-operative studies on determining toxic values against wood-destroying Basidiomycetes: Progress report to May 1989
1989 - IRG/WP 2339
This document reports progress on the co-operative study between nine laboratories set up following the proposals contained in Document IRG/WP/2316. Results have been received from two laboratories. Toxic values data have been established successfully using the test fungus Coniophora puteana but problems have been encountered with the other test fungi.
A F Bravery, J K Carey
The Third Annual Report of the International Research Group on Wood Preservation 1971-1972
1972 - IRG/WP 511
The Fourteenth Report of the Internatinal Research Group on Wood Preservation 1984-1985
1985 - IRG/WP 5218
The Seventh Annual Report of the International Research Group on Wood Preservation 1975-1976
1976 - IRG/WP 551
The Eighth Annual Report of the International Research Group on Wood Preservation 1976-1977
1978 - IRG/WP 569
Results of co-operative studies on determining toxic values against wood-destroying Basidiomycetes. Preliminary report to Sub-group members
1986 - IRG/WP 2271
A F Bravery, J K Carey
The Ninth Annual Report of the International Research Group on Wood Preservation 1978-1979
1979 - IRG/WP 579
Working Group I 'Biological Problems' Sub-group 'Insects in dry wood (other than termites)', Scope of work
1976 - IRG/WP 152
The Tenth Report of the International Research Group on Wood Preservation 1979-1980
1980 - IRG/WP 5110
The Sixth Annual Report of the International Research Group on Wood Preservation 1974-1975
1975 - IRG/WP 541
The Thirteenth Report of the International Research Group on Wood Preservation 1983
1984 - IRG/WP 5194
The Twelwth Report of the International Research Group on Wood Preservation 1982-1983
1983 - IRG/WP 5177