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1、BRITISH STANDARD BS EN 771-4:2003 Incorporating Amendment No. 1 Specification for masonry units Part 4: Autoclaved aerated concrete masonry units The European Standard EN 771-4:2003, with the incorporation of ICS 91.100.30 ? amendment A1:2005, has the status of a British Standard BS EN 771-4:2003 pu
2、blished under the authority of the Standards Policy and Strategy Committee on 30 October 2003 BSI 30 November 2005 ISBN 0 580 42782 X National foreword This British Standard is the official English language version of EN 771-4:2003, including amendment A1:2005. It supersedes BS EN 771-4:2001 which i
3、s withdrawn. The start and finish of text introduced or altered by CEN amendment is indicated in the text by tags !“ . Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“. EN 771-4:2003 is a candidate “harmonized
4、” European Standard and fully takes into account the requirements of the European Commission mandate M116, Masonry and related products, given under the EU Construction Products Directive (89/106/EEC), and is intended to lead to CE marking. The date of applicability of EN 771-4:2003 as a “harmonized
5、” European Standard, i.e. the date after which this standard may be used for CE marking purposes, is subject to an announcement in the Official Journal of the European Communities. The Commission in consultation with Member States has agreed a transition period for the co-existence of “harmonized” E
6、uropean Standards and their corresponding national standard(s). It is intended that this period will comprise a period, usually nine months, after the date of availability of the European Standard, during which any required changes to national regulations are to be made, followed by a further period
7、, usually of 12 months, for the implementation of CE marking. At the end of this co-existence period, the national standard(s) will be withdrawn. EN 771-4:2003 is the subject of transitional arrangements agreed under the Commission mandate. In the UK, the corresponding national standard is: BS 6073-
8、1:1981, Precast concrete masonry units Part 1: Specification for precast concrete masonry units; and based on this transition period of twenty-one months, the above mentioned national standards will be withdrawn in April 2006. NOTE This date is approximate. Users of this standard should contact BSI
9、Customer Services for confirmation of withdrawal. The UK participation in its preparation was entrusted by Technical Committee B/519, Masonry and associated testing, to Subcommittee B/519/1, Masonry units, which has the responsibility to: aid enquirers to understand the text; present to the responsi
10、ble international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Amendments issued since publication Amd. No. DateComments 1600021 November 2005 In
11、corporation of CEN amendment A1:2005 and revision of national annex NA and national foreword This British Standard was BS EN 771-4:2003 i A list of organizations represented on this subcommittee can be obtained on request to its secretary. EN 771-4 specifies the characteristics and performance requi
12、rements for autoclaved aerated concrete masonry units available throughout the CEN member countries. It aims to do so in product performance terms, avoiding as far as possible prescriptive requirements and all the traditional designations of autoclaved aerated concrete units available throughout Eur
13、ope. Current products, however, will continue to be manufactured, traded and used, even though they are not referred to by name in this European Standard. The concept of the declared value has been introduced and is the value for the various properties referred to in this standard that the manufactu
14、rer claims for the product. There are other notable differences to which the national annex will refer, in particular the supporting test methods are different and in respect of compressive strength, AAC masonry units are designated either Category 1 or Category 2. The UK National Annex NA attached
15、to this standard provides an informative commentary on the differences between EN 771-4 and BS 6073-1. Nothing in this annex should be construed as specifying requirements other than those contained in the normative parts of this European Standard. If CE marking is performed, the procedures in Annex
16、 ZA will apply. The significance of the CE marking is that the product manufacturer claims compliance with the “harmonized” requirements given in the normative text of the product standard. These relate to the essential requirements of the EU Construction Products Directive. Not all product characte
17、ristics need necessarily be given on the CE marking, but those product characteristics covered by regulations in force in each EU Member State, where the manufacturer intends that the product will be used, do need to be stated. It cannot be assumed that the declared value of a performance characteri
18、stic given for a masonry unit conforming to one part of EN 771 can be directly compared with the same performance characteristic for a masonry unit conforming to another part of EN 771. Cross-references The British Standards which implement international or European publications referred to in this
19、document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “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 contr
20、act. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 35 and a back cover. The
21、BSI copyright notice displayed in this document indicates when the document was last issued. BSI 30 November 2005 ii w w w . b z f x w . c o m EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 771-4 ICS 91.100.30Supersedes EN 771-4:2000 English version Specification for masonry units - Part 4: Au
22、toclaved aerated concrete masonry units Spcifications pour lments de maonnerie - Partie 4: Elments de maonnerie en bton cellulaire autoclave Festlegungen fr Mauersteine - Teil 4: Porenbetonsteine CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
23、 for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three officia
24、l versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALI
25、SATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 771-4:2003 +A1 February 2005 (includes amendment A1:2005) (inclut lamendement A1:2005)
26、 (enthlt nderung A1:2005) This European Standard was approved by CEN on 9 April 2003; amendment A1:2005 was approved by CEN on 29 December 2004. + A1:2005 E CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
27、Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. July 2003 w w w . b z f x w . c o m EN 771-4:2003 (E) 2 Contents Page Foreword 4 Foreword to Amendment A1 5 1 Scope. 6 2 N
28、ormative references 6 3 Terms and definitions 7 4 Materials and manufacture . 8 4.1 General 8 4.2 Materials of manufacture. 9 5 Requirements for AAC masonry units. 9 5.1 General 9 5.2 Dimensions and tolerances 9 5.2.1 Dimensions. 9 5.2.2 Tolerances 11 5.3 Configuration 12 5.4 Density 12 5.4.1 Gross
29、dry density. 12 5.4.2 Net dry density. 13 5.4.3 Limit deviations 13 5.5 Compressive strength. 13 5.6 Thermal properties. 13 5.7 Durability. 14 5.8 Moisture movement. 14 5.9 Water vapour permeability 14 5.10 Water absorption 14 5.11 Reaction to fire. 14 5.12 Shear bond strength 15 5.12.1 General 15 5
30、.12.2 Declaration based on fixed values. 15 5.12.3 Declaration based on tests. 15 5.13 Flexural bond strength 15 6 Description, designation and classification of AAC masonry units. 15 6.1 Description and designation. 15 6.2 Classification 16 7 Marking . 16 8 Evaluation of conformity. 17 8.1 General
31、17 8.2 Initial type tests 17 8.3 Factory production control. 18 8.3.1 General 18 8.3.2 Raw materials. 18 8.3.3 Production process . 18 8.3.4 Finished product testing. 18 8.3.5 Stock control 18 Annex A (normative) Sampling for initial type testing and for independent testing of consignments. 19 A.1 G
32、eneral 19 A.2 Sampling procedure for an assessment of product compliance 19 w w w . b z f x w . c o m EN 771-4:2003 (E) 3 A.2.1 Random sampling 19 A.2.2 Representative sampling 19 A.2.3 Dividing the sample. 20 A.2.4 Number of units required for testing . 20 Annex B (normative) Cutting schemes. 21 B.
33、1 Cutting scheme for producing cubes or prisms from AAC masonry units in order to determine the dry density. 21 B.2 Cutting scheme for producing cubes from AAC masonry units in order to determine compressive strength . 22 Annex ZA (informative) Clauses of this European Standard addressing the provis
34、ions of the EU Construction Products Directive . 23 w w w . b z f x w . c o m EN 771-4:2003 (E) 4 Foreword This document (EN 771-4:2003) has been prepared by Technical Committee CEN/TC 125 “Masonry“, the secretariat of which is held by BSI. This European Standard shall be given the status of a natio
35、nal standard, either by publication of an identical text or by endorsement, at the latest by January 2004, and conflicting national standards shall be withdrawn at the latest by April 2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free
36、Trade Association and supports the essential requirements of the EU Construction Products Directive (89/106/EEC). For relationship with EU Directive(89/106/EEC), see informative Annex ZA which is an integral part of this standard. It also takes into account the general rules for unreinforced and rei
37、nforced masonry in Eurocode 6. The Annexes A and B of this European Standard are normative. This European Standard replaces EN 771-4:2000. EN 771, Specification for masonry units consists of: Part 1: Clay masonry units. Part 2: Calcium silicate masonry units. Part 3: Aggregate concrete masonry units
38、 (Dense and light-weight aggregates). Part 4: Autoclaved aerated concrete masonry units. Part 5: Manufactured stone masonry units. Part 6: Natural stone masonry units. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to impl
39、ement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. w w w . b z f x w . c o m EN 771-4:2003 (E) 5 Th
40、is document (EN 771-4:2003/A1:2005) has been prepared by Technical Committee CEN/TC 125 “Masonry”, the Secretariat of which is held by BSI. This Amendment to the European Standard EN 771-4:2003 shall be given the status of a national standard, either by publication of an identical text or by endorse
41、ment, at the latest by August 2005, and conflicting national standards shall be withdrawn at the latest by August 2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive
42、(s). For relationship with EU Directive(s), see modifications to informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria
43、, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Foreword to amendment A1 w w w . b z f x w .
44、c o m EN 771-4:2003 (E) 6 1 Scope This European Standard specifies the characteristics and performance requirements of autoclaved aerated concrete (AAC) masonry units for which the main intended uses are different types of load bearing and non-load bearing applications in all forms of walling includ
45、ing single leaf, cavity, partitions, retaining, basement and general use below ground level, including walling for fire protection, thermal insulation, sound insulation and the fabric of chimneys (excluding chimney flue units). It defines the performance related to e.g. strength, density, dimensiona
46、l accuracy etc. and provides for the evaluation of conformity of the product to this European Standard. The marking requirement for products covered by this European Standard is included. This European Standard does not cover the requirements for storey height panels, flue linings and masonry units
47、with an incorporated thermal insulation material bonded to the faces of the unit susceptible to be exposed to fire. It does not specify standard sizes for autoclaved aerated concrete units nor standard work dimensions and angles of specially shaped and accessory units. It does not give permissible d
48、eviations for specially shaped and accessory units. It does not cover products intended for use as a damp proof course or the lining of a chimney. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references
49、are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 680, Determination of the drying shrinkage of autoclaved aerated concrete !EN 772-1,“ Methods