Wood preservatives - Artificial weathering of treated wood prior to biological testing - UV-radiation and water-spraying procedure

This document specifies a method for the artificial weathering of test specimens of treated wood, which are used in the testing of the biological efficacy of wood preservatives.
This method is applicable to:
a)   the pre-conditioning of test specimens prior to their being subjected to a biological test; or
b)   assessment of loss of effectiveness by comparing the performance in a biological test of treated test specimens subjected to this procedure with others that have not undergone any artificial weathering procedure.
NOTE   The method can also be used for pre-conditioning of wood-based panel products, which may or may not have received preservative treatment.

Holzschutzmittel - Künstliche Bewitterung von behandeltem Holz vor biologischen Prüfungen - Beanspruchung mit UV-Strahlung und Wassersprühen

Produits de préservation du bois - Exposition artificielle aux intempéries des bois traités avant essais biologiques - Epreuves de rayonnement UV et de pulvérisation d'eau

Le présent document prescrit une méthode d'exposition artificielle d'éprouvettes de bois traité utilisées lors de l'essai de l'efficacité biologique des produits de préservation du bois.
Cette méthode s'applique :
a)   au conditionnement préalable des éprouvettes avant de les soumettre a un essai biologique ; ou
b)   a l'évaluation de la perte d'efficacité, en comparant, lors d'un essai biologique, les performances d'éprouvettes traitées soumises a cette épreuve a celles d'autres éprouvettes n'ayant pas subi d'exposition artificielle aux intempéries.
NOTE   La méthode peut également etre appliquée pour le conditionnement préalable de panneaux a base de bois ayant pu avoir subi un traitement de préservation ou pas.

Zaščitna sredstva za les - Umetno vremensko staranje zaščitenega lesa pred biološkim preskušanjem – Postopek UV-sevanja in vodnega škropljenja

General Information

Status
Published
Publication Date
30-Jun-2005
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jul-2005
Due Date
01-Jul-2005
Completion Date
01-Jul-2005

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SIST-TP CEN/TR 15046:2005
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SLOVENSKI STANDARD
SIST-TP CEN/TR 15046:2005
01-julij-2005
=DãþLWQDVUHGVWYD]DOHV8PHWQRYUHPHQVNRVWDUDQMH]DãþLWHQHJDOHVDSUHG
ELRORãNLPSUHVNXãDQMHP±3RVWRSHN89VHYDQMDLQYRGQHJDãNURSOMHQMD

Wood preservatives - Artificial weathering of treated wood prior to biological testing - UV-

radiation and water-spraying procedure
Holzschutzmittel - Künstliche Bewitterung von behandeltem Holz vor biologischen
Prüfungen - Beanspruchung mit UV-Strahlung und Wassersprühen

Produits de préservation du bois - Exposition artificielle aux intempéries des bois traités

avant essais biologiques - Epreuves de rayonnement UV et de pulvérisation d'eau
Ta slovenski standard je istoveten z: CEN/TR 15046:2005
ICS:
71.100.50 .HPLNDOLMH]D]DãþLWROHVD Wood-protecting chemicals
SIST-TP CEN/TR 15046:2005 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CEN/TR 15046:2005
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SIST-TP CEN/TR 15046:2005
TECHNICAL REPORT
CEN/TR 15046
RAPPORT TECHNIQUE
TECHNISCHER BERICHT
March 2005
ICS 71.100.50
English version
Wood preservatives - Artificial weathering of treated wood prior
to biological testing - UV-radiation and water-spraying procedure

Produits de préservation du bois - Exposition artificielle aux Holzschutzmittel - Künstliche Bewitterung von behandeltem

intempéries des bois traités avant essais biologiques - Holz vor biologischen Prüfungen - Beanspruchung mit UV-

Epreuves de rayonnement UV et de pulvérisation d'eau Strahlung und Wassersprühen

This Technical Report was approved by CEN on 3 February 2005. It has been drawn up by the Technical Committee CEN/TC 38.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,

Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,

Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 15046:2005: E

worldwide for CEN national Members.
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SIST-TP CEN/TR 15046:2005
CEN/TR 15046:2005 (E)
Contents
Page

1 Scope ......................................................................................................................................................5

2 Principle..................................................................................................................................................5

3 Material and apparatus..........................................................................................................................5

3.1 Material ...................................................................................................................................................5

3.2 Apparatus ...............................................................................................................................................5

4 Test specimens......................................................................................................................................7

4.1 Definition and origin..............................................................................................................................7

4.2 Number of test specimens....................................................................................................................7

5 Procedure ...............................................................................................................................................7

5.1 Artificial weathering ..............................................................................................................................7

5.2 Duration of the artificial weathering procedure................................................................................10

5.3 Drying....................................................................................................................................................10

5.4 Repairing the end-sealing...................................................................................................................10

6 Destination of the test specimens after the artificial weathering procedure ................................10

7 Test report ............................................................................................................................................10

Annex A (informative) Example of a suitable test specimens holder ........................................................11

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SIST-TP CEN/TR 15046:2005
CEN/TR 15046:2005 (E)
Foreword

This document (CEN/TR 15046:2005) has been prepared by Technical Committee CEN/TC 38 “Durability of

wood and derived materials”, 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 announce this Technical Report: Austria, Belgium, Cyprus, Czech Republic, Denmark,

Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,

Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the

United Kingdom.
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SIST-TP CEN/TR 15046:2005
CEN/TR 15046:2005 (E)
Introduction

This document is based on the results of the S.M.T. Project: F.A.C.T, SMT 4 CT 96 2135 and in particular in

accordance with the findings of Task 1 which consisted of a study of artificial weathering techniques for the

conditioning of treated test blocks prior to biological test. (see the summary of the research in CEN/TR 14723)

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SIST-TP CEN/TR 15046:2005
CEN/TR 15046:2005 (E)
1 Scope

This document specifies a method for the artificial weathering of test specimens of treated wood, which are

used in the testing of the biological efficacy of wood preservatives.
This method is applicable to:

a) the pre-conditioning of test specimens prior to their being subjected to a biological test; or

b) assessment of loss of effectiveness by comparing the performance in a biological test of treated test

specimens subjected to this procedure with others that have not undergone any artificial weathering

procedure.

NOTE The method can also be used for pre-conditioning of wood-based panel products, which may or may not have

received preservative treatment.
2 Principle

Artificial weathering for a specified period in a device providing UV-radiation and spraying of demineralised

water, of test specimens that have been prepared for biological testing of the efficacy of a wood preservative

against fungi or insects, using the appropriate standard methods.
3 Material and apparatus
3.1 Material
3.1.1 Water, demineralised.

NOTE For example water conforming to the grade 3 specified in EN ISO 3696 may be used.

3.1.2 End-sealing material, according to the specifications recommended in the standard test method to be

applied after the artificial weathering.
3.2 Apparatus
3.2.1 Test chamber

The test chamber is made from corrosion resistant material in which are housed the lamps, a heated water tray,

spray nozzles and test specimen racks.
3.2.1.1 Lamps

The UV lamp emits UV light from a low pressure mercury arc. The required spectral distribution is achieved by a

careful selection of the type of phosphor coating on the inner surface of the lamp and the nature of the glass

used in the construction of the tubes.

Unless otherwise specified or mutually agreed the lamp shall be of the following type:

Lamp, commonly called UVA 340, has a peak emission at 340 nm and the relative spectral irradiance is given in

Table 1.
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SIST-TP CEN/TR 15046:2005
CEN/TR 15046:2005 (E)
Table 1 — Relative spectral irradiance of lamp
Wavelength Relative spectral irradiance
nm %
100
270 < λ ≤ 400
λ ≤ 270
270 < λ ≤ 280
280 < λ ≤ 300
7,8 ± 0,8
300 < λ ≤ 320
29,6 ± 3,0
320 < λ ≤ 340
34,4 ± 3,4
340 < λ ≤ 360
20,9 ± 2,1
360 < λ ≤ 380
7,3 ± 0,7
380 < λ ≤ 400
The spectral irradiance between 270 nm and 400 nm is defined as 100 %.
3.2.1.2 Device for wetting the test specimens

The test specimens shall be wetted by spray of water. To prevent spotting on to the test specimens water

demineralised (3.1.1) shall be used.
The spray
...

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