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1、DRAFT FOR DEVELOPMENT DD CEN/TS 15397:2006 Wood preservatives Method for natural preconditioning out of ground contact of treated wood specimens prior to biological laboratory test ICS 71.100.50 ? Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:36:49 GMT+00:0
2、0 2006, Uncontrolled Copy, (c) BSI DD CEN/TS 15397:2006 This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006 ISBN 0 580 48747 4 National foreword This Draft for Development is the official English language version of CEN
3、/TS 15397:2006. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development series of publications and is of a provisional nature because the Technical Committee need some time to collect the data in this relatively new area of technology. It should
4、be applied on this provisional basis, so that information and experience of its practical application may be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the European organization responsible for its conversion to a Euro
5、pean standard. A review of this publication will be initiated 2 years after its publication by the European organization so that a decision can be taken on its status at the end of its 3-year life. Notification of the start of the review period will be made in an announcement in the appropriate issu
6、e of Update Standards. According to the replies received by the end of the review period, the responsible BSI Committee will decide whether to support the conversion into a European standard, to extend the life of the Technical Specification or to withdraw it. Comments should be sent in writing to t
7、he Secretary of BSI Technical Committee B/515, Wood preservation, at British Standards House, 389 Chiswick High Road, London W4 4AL, giving the document reference and clause number and proposing, where possible, an appropriate revision of the text. A list of organizations represented on this subcomm
8、ittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “
9、Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Summary of pages This document comprises a front cover, an inside front cover,
10、the CEN/TS title page, pages 2 to 14, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank Unive
11、rsity, Tue Dec 12 05:36:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 15397 May 2006 ICS 71.100.50 English Version Wood preservatives - Method for natural preconditioning out of ground contact of treated wood specimens pr
12、ior to biological laboratory test Produits de prservation du bois - Mthode de prconditionnement naturel dprouvettes de bois trait, sans contact avec le sol, avant essai biologique en laboratoire Holzschutzmittel - Verfahren zur natrlichen Vorkonditionierung ohne Erdkontakt fr behandelte Holz- Prfkrp
13、er vor biologischer Laborprfung This Technical Specification (CEN/TS) was approved by CEN on 11 March 2006 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particular
14、ly on the question whether the CEN/TS can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting na
15、tional standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ic
16、eland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue
17、de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 15397:2006: E Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:36:49 GMT+00:00 2006, Uncontrolled Copy,
18、 (c) BSI 2 Contents Page Foreword3 Introduction.4 1 Scope5 2 Normative references5 3 Principle5 4 Materials .5 5 Apparatus.5 6 Wood test specimens6 7 End-sealing prior to exposure9 8 Labelling.9 9 Exposure to natural conditions9 10 Duration of the natural preconditioning procedure 12 11 Preparation
19、of test specimens and stakes for biological tests . 12 12 Reference in the test report. 13 Bibliography. 14 DD CEN/TS 15397:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:36:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 Foreword This Technical Specifi
20、cation (CEN/TS 15397:2006) has been prepared by Technical Committee CEN/TC 38 “Durability of wood and wood-based products”, the secretariat of which is held by AFNOR. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to annou
21、nce this CEN Technical Specification: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland a
22、nd United Kingdom. DD CEN/TS 15397:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:36:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 Introduction For use of class 3 according to EN ISO 335-1 field tests, like those described in EN 330 and ENV 12037, are
23、 a valuable means of studying the performance of a wood preservative. However, they are questionable as a basis of approvals of wood preservatives for some reasons: The abiotic factors of outdoor exposure, such as wind, temperatures, UV radiation and rain can in combination with biotic factors chang
24、e or depreciate the applied wood preservative to such an extent as to allow decay. A low frequency of precipitation and the duration of temperatures below or slightly above the freezing point can, however, in some areas of Europe hinder the development of fungi and a resulting visible deterioration.
25、 Likewise the effectiveness against wood-boring beetles can also be reduced although infestation of the timber can not occur because the weather conditions in a particular field will not promote cracking of the timber - a prerequisite for oviposition of for instance the house longhorn beetle. Furthe
26、rmore under natural conditions fungal attack and insect infestation can be quite accidental, leading to remarkable variations and therefore possible misinterpretations of the test results. Therefore - in a project supported by the Commission of the European Communities 1 to preclude such disadvantag
27、es - a method was developed and tested with a number of the most commonly used wood preservatives. In this method the treated wood specimens were exposed without soil contact to the natural abiotic and biotic ageing factors, the complexity of which cannot - or only incompletely - be simulated with t
28、he available artificial ageing methods EN 73 and EN 84. After defined periods of outdoor exposure, attack of wood-destroying fungi and/or insects were examined under controlled laboratory conditions according to the relevant European Standards. The applicability of this principle to a number of typi
29、cal European climates was confirmed in a further project also supported by the Commission of the European Communities2. With some amendments to the method used in the projects, this document is based on this principle. DD CEN/TS 15397:2006 Licensed Copy: London South Bank University, London South Ba
30、nk University, Tue Dec 12 05:36:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 5 1 Scope This CEN Technical Specification specifies a method of natural preconditioning for wood specimens treated with a wood preservative either by penetrating processes or by surface application that can be used in con
31、junction with existing European Standards on testing of the preventive action of wood preservatives against basidiomycetes and/or insects. 2 Normative references Not applicable 3 Principle Wood test specimens treated with a wood preservative according to relevant biological test methods are exposed
32、to natural outdoor conditions in a test field. The test specimens are fixed on a rack facing the prevailing weather under 45. If brush treatment, dipping, steeping or double vacuum treatment is recommended, instead of the test specimens described in the relevant European Standards, end-sealed wood s
33、takes with a cross section equal to the cross section of the test specimens in the relevant test methods can be used. After different periods of outdoor exposure the standard test specimens and end-sealed test specimens derived from the stakes by cutting to a length of 50 mm are exposed to biologica
34、l laboratory tests as for instance those described in EN 46-1,EN 46-2, EN 47, EN 113 or ENV 839 respectively. 4 Materials 4.1 End-seal compounds 4.1.1 Preservative resistant end-seal A material resistant to the penetration of the test preservative solutions. NOTE Polyvinyl acetate (PVAc) glues have
35、been found to be suitable for many organic solvent formulations. For water-borne formulations the weatherproof end-seal (4.1.2) may be used. 4.1.2 Weatherproof end-seal A material which prevents water entry as well as microbial infection and remains effective during long term exposure to the weather
36、. NOTE Two coats of an epoxy-resin/pitch compound have been found to be suitable. 5 Apparatus 5.1 Sawing equipment A sawing machine capable of producing a fine sawn finish. 5.2 Drilling machine and drills DD CEN/TS 15397:2006 Licensed Copy: London South Bank University, London South Bank University,
37、 Tue Dec 12 05:36:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 5.3 Conditioning chamber, well ventilated and controlled at (20 2) C and (65 5) % relative humidity. 5.4 Ventilated drying oven, capable of being maintained at (103 3) C. 5.5 Desiccators, with efficient desiccant (silica gel for examp
38、le). 5.6 Equipment, suitable for carrying out the treatment specified by the supplier. 5.7 Balance, capable of weighing to the nearest 0,01 g. 5.8 Safety equipment and protective clothing, appropriate for the test product, to ensure the safety of the operator. 5.9 System for fixing stakes in the exp
39、osure rack: tubular copper rivets, plastic sticks and spiral springs of stainless steel. 5.10 Labels, inert, long-lasting labels and corrosion resisting fixing pins. 5.11 Exposure racks: Aluminium racks (see Figures 1 and 2) that allow test specimens or stakes to face the prevailing weather1 under 4
40、5, approximately 1 m above ground level. 5.12 Ordinary laboratory equipment. 6 Wood test specimens 6.1 Specimens according to the relevant biological test methods 6.1.1 General The test specimens and their preparation including treatment and post treatment conditioning are defined in the documents c
41、oncerning the biological tests to which they are intended to be subjected. The relevant test standards are those standards where the test specimens have the dimensions 15 mm x 25 mm x 50 mm. These include EN 46-1,EN 46-2, EN 47, EN 113 or ENV 839. The natural preconditioning procedure shall be carri
42、ed out at the end of the conditioning period that follows the treatment of the specimens described in the relevant biological test standard. 6.1.2 Number of test specimens The number of test specimens shall allow the relevant biological tests to be carried out in accordance with the instructions in
43、the appropriate documents, bearing in mind that the natural preconditioning procedure shall be applied both to treated specimens that are subjected to biological agents and to control test specimens. The control test specimens are of the following kinds: - treated test specimens that will not be sub
44、jected to attack by biological agents after natural preconditioning. These will serve as controls for changes in mass in those tests in which this factor is taken into consideration. One set of control test specimens will be needed for each concentration and period of exposure; 1 In most of the Euro
45、pean areas this would normally be south-west DD CEN/TS 15397:2006 Licensed Copy: London South Bank University, London South Bank University, Tue Dec 12 05:36:49 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 7 - untreated control test specimens which, after natural preconditioning, are subjected to the
46、biological tests to check any variation in the behaviour of untreated wood. One single set of test specimens shall be provided for each exposure period; - control test specimens treated with the solvent or diluent for each period of exposure if necessary. 6.2 Stakes 6.2.1 General If superficial trea
47、tment is recommended by the supplier of the test preservative, stakes can be used as an alternative. If so, the stakes shall have a cross section of (25 0,5) mm x (15 0,5) mm and an appropriate length which can be a multiple of (50 0,5) mm (the length of the test specimens in these include EN 46-1,E
48、N 46-2, EN 47, EN 113 or ENV 839). 6.2.2 Species of wood for stakes The reference species are the species mentioned in the relevant documents for the subsequent biological laboratory tests. If no requirements are given, e.g. in the case of intended double vacuum treatment, the reference species are
49、Scots pine, Pinus sylvestris Linnaeus, and beech (Fagus sylvatica Linnaeus). Additional tests can be undertaken using other species but, if so, this shall be stated in the test report. 6.2.3 Quality of wood The wood shall be free from visible cracks, stain, decay, insect damage and other defects. The wood shall not have been water-stored, floated, chemically treated or steamed. The wood shall originate from trees preferably felled in winter. NOTE Wood that has been kiln dried