1、DRAFT FOR DEVELOPMENTDD CEN/TS 15679:2007Thermal Modified Timber Definitions and characteristicsICS 01.040.79; 79.040g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42
2、g43g55g3g47g36g58DD CEN/TS 15679:2007This Draft for Development was published under the authority of the Standards Policy and Strategy Committee on 29 February 2008 BSI 2008ISBN 978 0 580 58601 9National forewordThis Draft for Development is the UK implementation of CEN/TS 15679:2007.This publicatio
3、n 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. It should be applied on this provisional basis, so that information and experience of its practical application can be obtained.Comments arising from t
4、he 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 European standard. A review of this publication will be initiated not later than three years after its publication by the European organization so
5、 that a decision can be taken on its status. Notification of the start of the review period will 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
6、 conversion into a European Standard, to extend the life of the Technical Specification or to withdraw 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
7、 entrusted to Technical Committee B/543, Round and sawn timber.A list of organizations represented 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.
8、 Amendments/corrigenda issued since publicationDate CommentsTECHNICAL SPECIFICATIONSPCIFICATION TECHNIQUETECHNISCHE SPEZIFIKATIONCEN/TS 15679November 2007ICS 01.040.79; 79.040English VersionThermal Modified Timber - Definitions and characteristicsBois Modifi Thermiquement - Dfinitions etcaractristiq
9、uesThermisch modifiziertes Holz - Definitionen undEigenschaftenThis 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 requested to
10、submit theircomments, 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 availablepromptly at national level in an appropriate form. It is perm
11、issible 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, Estonia, Finland
12、,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 STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE F
13、R NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. CEN/TS 15679:2007: E2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definition
14、s .7 4 Symbols and abbreviations 8 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 Density 11 5.6 Mechanical properties.11 5.6.1 Bending strength and modulus of elasticity.11 5.6.2 Impact strength
15、11 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 of TMT.12 5.9 Adhesion of coating to TMT .12 5.10 Emissions .12 5.11 Reaction to fire.12 5.12 Durability : resis
16、tance 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 the TMT product to be controlled.14 7 Marking .15 Annex A (informative) Examples of characteristics 16 A.1 Equilib
17、rium moisture content.16 A.2 Dimensional stability.16 A.3 Biological durability 17 Bibliography 18 CEN/TS 15679:20073 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
18、to the possibility that some of the elements of this document may be the subject of patent rights. 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
19、countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slov
20、enia, Spain, Sweden, Switzerland and the United Kingdom. CEN/TS 15679:20074 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 col
21、ours Due 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. Ther
22、mal modification 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
23、 altering 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 b
24、e taken 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
25、 in a bath of heated oil. CEN/TS 15679:20075 1 Scope This Technical Specification gives definitions and characteristics for Thermally Modified Timber. TMT is used in interior (dry, humid) and exterior conditions. NOTE 1 TMT is usually a semi-finished product; applications are e.g. flooring, panellin
26、g, 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 bearing applications reference to relevant EN standards should be made. 2 Normative re
27、ferences 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 document (including any amendments) applies. EN 20-2, Wood preservative Determination
28、 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 bajulus (Linnaeus) (Laboratory method) EN 84, Wood preservatives Accelerated ageing of
29、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 values EN 117, Wood preservatives Determination of toxic values against Reticulitermes spe
30、cies (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 a wood preservative in ground contact EN 275, Wood preservatives Determination of the
31、 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-based products Definition of use classes Part 1: General EN 335-2, Durability of wood and
32、 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 and classification of the natural durability of wood EN 383, Timber Structures Test meth
33、ods 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 CEN/TS 15679:20076 EN 460, Durability of wood and wood-based products Natural durabil
34、ity of solid wood Guide to the durability requirements for wood to be used in hazard classes ENV 807, Wood preservatives Determination of the effectiveness against soft rotting micro-fungi and other soil inhabiting micro-organisms prCEN/TS 839, Wood preservatives Determination of the protective effe
35、ctiveness against wood destroying basidiomycetes - Application by surface treatment. EN 844-1, Round and sawn timber Terminology 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 a
36、nd sawn timber Terminology Part 3 : General terms relating to sawn timber EN 844-4, Round and sawn timber Terminology Part 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 Terminol
37、ogy Part 6 : Terms relating to dimensions of sawn timber EN 844-7 Round and sawn timber Terminology Part 7: Terms relating 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 Par
38、t 9 : Terms relating to features of sawn timber EN 844-10, Round and sawn timber Terminology Part 10 : Terms relating to stain 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 : Addition
39、al terms and general index EN 927-6, Paints and varnishes - Coating materials and coating systems for exterior wood Part 6 : 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
40、EN 1380, Timber structures Test methods Load bearing nailed joints EN 1382, Timber structures Test methods Withdrawal capacity 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
41、 and cladding Determination of dimensional stability EN 1995-1-1, Eurocode 5: Design of timber structures Part 1-1: General 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
42、 of ground contact Horizontal lap-joint method ENV 12169, Criteria for the assessment of conformity of a lot of sawn timber EN 12524, Building materials and products Hygrothermal properties Tabulated design values CEN/TS 15679:20077 EN 12664, Thermal performance of building materials and products -
43、Determination of thermal resistance 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 constructio
44、n products and building elements - 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 eval
45、uation of conformity prCEN/TS 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 17
46、9-1, Plastics - Determination 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
47、floorings Part 1 : Determination 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, Pa
48、ints and varnishes - Colorimetry - Part 1: Principles ISO 7724-2, Paints and varnishes - Colorimetry Part 2 : Colour measurement ISO 7724-3, Paints and varnishes - Colorimetry Part 3 : Calculation of colour differences 3 Terms and definitions For the purposes of this document, the terms and definiti
49、ons given in EN 844 part 1 to part 12 and in EN 1001-2:2005 and the following apply. 3.1 thermally modified timber Wood at which the composition of the cell wall material and its physical properties are modified by the exposure of temperature higher than 160 C and conditions of reduced oxygen availability. The wood is altered in such way that at least some of the wood properties are permanently affected through the cross section o
