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1、DRAFT FOR DEVELOPMENT DD CEN/TS 15679:2007 Thermal Modified Timber Definitions and characteristics ICS 01.040.79; 79.040 ? Licensed CopyChinese University of Hong Kong, 20/10/2008 09:31, Uncontrolled Copy, (c) BSI DD CEN/TS 15679:2007 This Draft for Development was published under the authority of t
2、he Standards Policy and Strategy Committee on 29 February 2008 BSI 2008 ISBN 978 0 580 58601 9 National foreword This Draft for Development is the UK implementation of CEN/TS 15679:2007. This publication is not to be regarded as a British Standard. It is being issued in the Draft for Development ser
3、ies of publications and is of a provisional nature. It should be applied on this provisional basis, so that information and experience of its practical application can be obtained. Comments arising from the use of this Draft for Development are requested so that UK experience can be reported to the
4、European organization responsible for its conversion to a European standard. A review of this publication will be initiated not later than three years after its publication by the European organization so that a decision can be taken on its status. Notification of the start of the review period will
5、 be made in an announcement in the appropriate issue 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 w
6、ithdraw it. Comments should be sent to the Secretary of the responsible BSI Technical Committee at British Standards House, 389 Chiswick High Road, London W4 4AL. The UK participation in its preparation was entrusted to Technical Committee B/543, Round and sawn timber. A list of organizations repres
7、ented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Amendments/corrigenda issued since publication DateComments Licensed CopyChinese University
8、 of Hong Kong, 20/10/2008 09:31, Uncontrolled Copy, (c) BSI TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 15679 November 2007 ICS 01.040.79; 79.040 English Version Thermal Modified Timber - Definitions and characteristics Bois Modifi Thermiquement - Dfinitions et car
9、actristiques Thermisch modifiziertes Holz - Definitionen und Eigenschaften This Technical Specification (CEN/TS) was approved by CEN on 15 November 2007 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
10、requested to submit their comments, particularly 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
11、form. It is permissible to keep conflicting national 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, Bulgaria, Cyprus, Czech Republic, Denmark
12、, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, 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 NORMALISATIO
13、N EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 15679:2007: E Licensed CopyChinese University of Hong Kong, 20/10/2008 09:31, Uncontrol
14、led Copy, (c) BSI 2 Contents Page Foreword3 Introduction.4 1 Scope 5 2 Normative references5 3 Terms and definitions .7 4 Symbols and abbreviations8 5 Characteristics.8 5.1 General8 5.2 Equilibrium moisture content.10 5.3 Dimensional stability.10 5.4 Durability : resistance to attack by fungi 10 5.5
15、 Density11 5.6 Mechanical properties.11 5.6.1 Bending strength and modulus of elasticity.11 5.6.2 Impact strength11 5.6.3 Surface hardness.11 5.6.4 Tension perpendicular to grain11 5.6.5 Compression strength 12 5.6.6 Strength of mechanical fasteners12 5.7 Thermal conductivity.12 5.8 Adhesive bonding
16、 of TMT.12 5.9 Adhesion of coating to TMT .12 5.10 Emissions.12 5.11 Reaction to fire.12 5.12 Durability : resistance to attack by insects.12 5.13 Colour .12 6 Assessment of characteristics.13 6.1 General13 6.2 Sampling.13 6.3 Factory production control.13 6.3.1 General13 6.3.2 Characteristics of th
17、e TMT product to be controlled.14 7 Marking.15 Annex A (informative) Examples of characteristics 16 A.1 Equilibrium moisture content.16 A.2 Dimensional stability.16 A.3 Biological durability 17 Bibliography18 CEN/TS 15679:2007 Licensed CopyChinese University of Hong Kong, 20/10/2008 09:31, Uncontrol
18、led Copy, (c) BSI 3 Foreword This document (CEN/TS 15679:2007) has been prepared by Technical Committee CEN/TC 175 “Round and sawn timber”, the secretariat of which is held by AFNOR. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.
19、 CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Cyprus,
20、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 and the United Kingdom. CEN/TS 15679:2007 Licensed CopyChinese Un
21、iversity of Hong Kong, 20/10/2008 09:31, Uncontrolled Copy, (c) BSI 4 Introduction The principal changes on thermal modification of timber - compared with untreated wood are improved dimensional stability and increased resistance to decay by wood destroying fungi, and in some cases changed colours D
22、ue to the treatment, equilibrium moisture content of thermally modified timber is reduced. Because of altered strength properties comparing to untreated wood, for the use of TMT, it is essential that the relevant requirements of European and national Standards be taken into consideration. Thermal mo
23、dification may have an influence on reaction to fire properties of timber. The properties of thermally modified timber and the degree that the property changes is dependent of the wood species, the type of technology and the process parameters, particularly the treatment temperature level. The alter
24、ing of acoustic properties can be of interest particularly for musical instruments. Some tests have shown an increased resistance of TMT against some insects. Improved resistance against termites has not been proved. Requirements on resistance against termites in some EU member states are to be take
25、n into consideration. The technologies for manufacturing thermally modified timber are mainly characterized by the way they reduce the oxygen concentration during treatment. The currently applied, industrial scale processes are using atmospheres of heated air and or steam or heated nitrogen or in a
26、bath of heated oil. CEN/TS 15679:2007 Licensed CopyChinese University of Hong Kong, 20/10/2008 09:31, Uncontrolled Copy, (c) BSI 5 1 Scope This Technical Specification gives definitions and characteristics for Thermally Modified Timber. TMT is used in interior (dry, humid) and exterior conditions. N
27、OTE 1 TMT is usually a semi-finished product; applications are e.g. flooring, panelling, cladding, decking, windows, doors, furniture and other internal and external joinery. Where product standard exist, the given requirements and test methods are to be taken into consideration. NOTE 2 Use in load
28、bearing applications reference to relevant EN standards should be made. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced
29、 document (including any amendments) applies. EN 20-2, Wood preservative Determination of the protective effectiveness against Lyctus brunneus (Stephens) Part 2: Application by impregnation (Laboratory method) EN 47, Wood preservatives Determination of the toxic values against larvae of Hylotrupes b
30、ajulus (Linnaeus) (Laboratory method) EN 84, Wood preservatives Accelerated ageing of treated wood prior to biological testing Leaching procedure EN 113, Wood preservatives Test method for determining the protective effectiveness against wood destroying basidiomycetes Determination of the toxic valu
31、es EN 117, Wood preservatives Determination of toxic values against Reticulitermes species (European termites) (Laboratory method) EN 204, Classification of thermoplastic wood adhesives for non-structural applications EN 252, Field test method for determining the relative protective effectiveness of
32、 a wood preservative in ground contact EN 275, Wood preservatives Determination of the protective effectiveness against marine borers EN 301, Adhesives, phenolic and aminoplastic, for load-bearing timber structures Classification and performance requirements EN 335-1, Durability of wood and wood-bas
33、ed products Definition of use classes Part 1: General EN 335-2, Durability of wood and wood-based products Definition of use classes Part 2 : Application to solid wood, EN 350-1, Durability of wood and wood-based products Natural durability of solid wood Part 1: Guide to the principles of testing an
34、d classification of the natural durability of wood EN 383, Timber Structures Test methods Determination of embedment strength and foundation values for dowel type fasteners EN 408, Timber structures Structural timber and glued laminated timber Determination of some physical and mechanical properties
35、 CEN/TS 15679:2007 Licensed CopyChinese University of Hong Kong, 20/10/2008 09:31, Uncontrolled Copy, (c) BSI 6 EN 460, Durability of wood and wood-based products Natural durability of solid wood Guide to the durability requirements for wood to be used in hazard classes ENV 807, Wood preservatives D
36、etermination of the effectiveness against soft rotting micro-fungi and other soil inhabiting micro-organisms prCEN/TS 839, Wood preservatives Determination of the protective effectiveness against wood destroying basidiomycetes - Application by surface treatment. EN 844-1, Round and sawn timber Termi
37、nology Part 1 : General terms common to round timber and sawn timber EN 844-2, Round and sawn timber Terminology Part 2 : General terms relating to round timber EN 844-3, Round and sawn timber Terminology Part 3 : General terms relating to sawn timber EN 844-4, Round and sawn timber Terminology Part
38、 4 : Terms relating to moisture content EN 844-5, Round and sawn timber Terminology Part 5 : Terms relating to dimensions of round timber EN 844-6, Round and sawn timber Terminology Part 6 : Terms relating to dimensions of sawn timber EN 844-7 Round and sawn timber Terminology Part 7: Terms relating
39、 to anatomical structure of timber EN 844-8, Round and sawn timber Terminology Part 8 : Terms relating to features of round timber EN 844-9, Round and sawn timber Terminology Part 9 : Terms relating to features of sawn timber EN 844-10, Round and sawn timber Terminology Part 10 : Terms relating to s
40、tain and fungal attack EN 844-11, Round and sawn timber Terminology Part 11 : Terms relating to degrade by insects EN 844-12, Round and sawn timber Terminology Part 12 : Additional terms and general index EN 927-6, Paints and varnishes - Coating materials and coating systems for exterior wood Part 6
41、 : Exposure of wood coatings to artificial weathering using fluoresdent UV lamps and water EN 1001-2, Durability of wood and wood based products Terminology - Part 2: Vocabulary EN 1380, Timber structures Test methods Load bearing nailed joints EN 1382, Timber structures Test methods Withdrawal capa
42、city of timber fasteners EN 1534, Wood and parquet flooring Determination of resistance to indentation (Brinell) Test method EN 1910, Wood and parquet flooring and wood panelling and cladding Determination of dimensional stability EN 1995-1-1, Eurocode 5: Design of timber structures Part 1-1: Genera
43、l Common rules and rules for buildings CEN/TS 12037, Wood preservatives Field test method for determining the relative protective effectiveness of a wood preservative exposed out of ground contact Horizontal lap-joint method ENV 12169, Criteria for the assessment of conformity of a lot of sawn timbe
44、r EN 12524, Building materials and products Hygrothermal properties Tabulated design values CEN/TS 15679:2007 Licensed CopyChinese University of Hong Kong, 20/10/2008 09:31, Uncontrolled Copy, (c) BSI 7 EN 12664, Thermal performance of building materials and products - Determination of thermal resis
45、tance by means of guarded hot plate and heat flow meter methods - Dry and moist products of medium and low thermal resistance EN 13183-1, Moisture content of a piece of sawn timber - Part 1: Determination by oven dry method EN 13501-1, Fire classification of construction products and building elemen
46、ts - Part 1: Classification using data from reaction to fire tests EN 13823, Reaction to fire tests for building products - Building products excluding floorings exposed to the thermal attack by a single burning item EN 14762, Wood flooring, Sampling procedures for evaluation of conformity prCEN/TS
47、15397, Wood preservatives Method for natural preconditioning out of ground contact of treated wood specimens prior to biological laboratory test EN 20105-A03, Textiles - Tests for colour fastness - Part A03: Grey scale for assessing staining (ISO 105- A03:1993) EN ISO 179-1, Plastics - Determination
48、 of Charpy impact properties - Part 1: Non-instrumented impact test (ISO 179- 1:2000) EN ISO 2409, Paints and varnishes - Cross-cut test (ISO 2409:1992) EN ISO 4624, Paints and varnishes Pulloff test for ahesion (ISO 4624: 2002) EN ISO 9239-1, Reaction to fire tests for floorings Part 1 : Determinat
49、ion of the burning behaviour using a radiant heat source (ISO 9239-1:2002) EN ISO 16000-9, Indoor air Part 9 : Determination of the emission of volatile organic compounds from building products and furnishing Emission test chamber method (ISO 16000-9:2006) ISO 7724-1, Paints and varnishes - Colorimetry - Part 1: Principles ISO 7724-2, Paints and varnishes - Col