1、BSI Standards PublicationBS EN 771-4:2011Specification for masonry unitsPart 4: Autoclaved aerated concretemasonry unitsBS EN 771-4:2011+A1:2015BS EN 771-4:2011+A1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 771-4:2011+A1:2015. It supersedes BS EN 771-4
2、:2011, which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags.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 771-4:2011 is a “harmonized” Europe
3、an Standard and fully takes into account the requirements of the European Commission mandate M116, Masonry and related products, given under the EU Construction Products Regulation (Regulation (EU) No 305/2011).EN 771-4 was the subject of transitional arrangements agreed under the Commission mandate
4、. In the UK, the corresponding national standard was: BS 6073-1:1981, Precast concrete masonry units Part 1: Specification for precast concrete masonry units;which was withdrawn in 2005.The UK participation in its preparation was entrusted by Technical Committee B/519, Masonry and associated testing
5、, to Subcommittee B/519/1, Masonry units.A list of organizations represented on this subcommittee can be obtained on request to its secretary.EN 771-4 specifies the characteristics and performance requirements for autoclaved aerated concrete masonry units available throughout the CEN member countrie
6、s. It aims to do so in product performance terms, avoiding as far as possible prescriptive requirements but permitting all the traditional designations of autoclaved aerated units available throughout Europe. The concept of the declared value has been introduced. This is the value for the various pr
7、operties referred to in this standard that the manufacturer claims for the product. There are other notable differences to which the national annex refers, in particular the supporting test methods are different and in respect of compressive strength, manufactured autoclaved aerated concrete masonry
8、 units are designated either Category I or Category II.The UK National Annex NA 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 part
9、s of this European Standard.Masonry units conforming to this standard need to be CE marked in accordance with the procedures in Annex ZA. The significance of the CE marking is that the product manufacturer claims compliance with the “harmonized” requirements given in the normative text of the produc
10、t standard. These relate to the essential requirements of the EU Construction Products Regulation. Not all product characteristics 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 th
11、at the product will be used, do need to be stated.BS EN 771-4:2011+A1:2015BRITISH STANDARDIt cannot be assumed that the declared value of a performance characteristic given for a masonry unit conforming to one part of EN 771 can be directly compared with the same performance characteristic for a mas
12、onry unit conforming to another part of EN 771.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016ISBN 978 0 580 79494 0ICS 91.100.3
13、0Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2011.Amendments/corrigenda issued since publicationDate Text affected31 March 2016 Implementation of
14、CEN amendment A1:2015. National Foreword and National Annex NA also updatedThis page deliberately left blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 771-4:2011+A1 August 2015 ICS 91.100.30 Supersedes EN 771-4:2011English Version Specification for masonry units - Part 4: Autoclaved aerate
15、d concrete masonry units Spcifications pour lments de maonnerie - Partie 4: lments de maonnerie en bton cellulaire autoclav Festlegungen fr Mauersteine - Teil 4: Porenbetonsteine This European Standard was approved by CEN on 17 March 2011 and includes Amendment 1 approved by CEN on 11 January 2015.
16、CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions 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 a
17、pplication to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official 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 CEN-CENELEC
18、 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
19、Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue
20、Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 771-4:2011+A1:2015 EEN 771-4:2011+A1:2015 (E) 2 Contents Page European foreword .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Mate
21、rials and manufacture .8 4.1 General 8 4.2 Materials of manufacture 8 5 Requirements for AAC masonry units 8 5.1 General 8 5.2 Dimensions and tolerances 8 5.2.1 Dimensions .8 5.2.2 Tolerances 9 5.3 Configuration 10 5.4 Density . 11 5.4.1 Gross dry density . 11 5.4.2 Net dry density 11 5.4.3 Limit de
22、viations . 12 5.5 Compressive strength 12 5.6 Thermal properties . 12 5.7 Durability . 12 5.8 Moisture movement 13 5.9 Water vapour permeability . 13 5.10 Water absorption 13 5.11 Reaction to fire 13 5.12 Shear bond strength . 13 5.12.1 General . 13 5.12.2 Declaration based on fixed values 14 5.12.3
23、 Declaration based on tests 14 5.13 Flexural bond strength . 14 5.14 Dangerous substances 14 6 Description, designation and classification of AAC masonry units . 14 6.1 Description and designation . 14 6.2 Classification . 15 7 Marking 15 8 !Assessment and verification of constancy of performance (A
24、VCP)“ 15 8.1 General . 15 8.2 Product type determination . 16 8.3 Factory production control 17 8.3.1 General . 17 8.3.2 Testing and measuring equipment . 17 8.3.3 Production equipment 17 8.3.4 Raw materials 17 8.3.5 Production process 17 8.3.6 Finished product testing 18 8.3.7 Statistical technique
25、s . 18 8.3.8 Marking and stock control of products 18 EN 771-4:2011+A1:2015 (E) 3 8.3.9 Traceability . 18 8.3.10 Nonconforming products . 18 Annex A (normative) !Sampling for product type determination test and for independent testing of consignments“ 19 A.1 General . 19 A.2 Sampling procedure for a
26、n assessment of product compliance . 19 A.2.1 Random sampling . 19 A.2.2 Representative sampling 19 A.2.3 Dividing the sample . 20 A.2.4 Number of masonry units required for testing . 20 Annex B (normative) Cutting schemes . 21 B.1 Cutting scheme for producing cubes or prisms from AAC masonry units
27、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 C (informative) Guidance on FPC frequencies. 23 Annex ZA (informative) !Clauses of this European Standard addressing the provisions of the EU
28、 Construction Products Regulation“ 25 ZA.1 Scope and relevant characteristics . 25 ZA.2 Procedure(s) for AVCP of Autoclaved Aerated Concrete masonry units 26 ZA.2.1 System(s) of AVCP 26 ZA.2.2 Declaration of performance (DoP) . 28 ZA.3 CE marking and labelling 32 Bibliography 35 BS EN 771-4:2011+A1:
29、2015EN 771-4:2011+A1:2015 (E)EN 771-4:2011+A1:2015 (E) 2 Contents Page European foreword .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Materials and manufacture .8 4.1 General 8 4.2 Materials of manufacture 8 5 Requirements for AAC masonry units 8 5.1 General 8 5.2 Dimensions an
30、d tolerances 8 5.2.1 Dimensions .8 5.2.2 Tolerances 9 5.3 Configuration 10 5.4 Density . 11 5.4.1 Gross dry density . 11 5.4.2 Net dry density 11 5.4.3 Limit deviations . 12 5.5 Compressive strength 12 5.6 Thermal properties . 12 5.7 Durability . 12 5.8 Moisture movement 13 5.9 Water vapour permeabi
31、lity . 13 5.10 Water absorption 13 5.11 Reaction to fire 13 5.12 Shear bond strength . 13 5.12.1 General . 13 5.12.2 Declaration based on fixed values 14 5.12.3 Declaration based on tests 14 5.13 Flexural bond strength . 14 5.14 Dangerous substances 14 6 Description, designation and classification o
32、f AAC masonry units . 14 6.1 Description and designation . 14 6.2 Classification . 15 7 Marking 15 8 !Assessment and verification of constancy of performance (AVCP)“ 15 8.1 General . 15 8.2 Product type determination . 16 8.3 Factory production control 17 8.3.1 General . 17 8.3.2 Testing and measuri
33、ng equipment . 17 8.3.3 Production equipment 17 8.3.4 Raw materials 17 8.3.5 Production process 17 8.3.6 Finished product testing 18 8.3.7 Statistical techniques . 18 8.3.8 Marking and stock control of products 18 EN 771-4:2011+A1:2015 (E) 3 8.3.9 Traceability . 18 8.3.10 Nonconforming products . 18
34、 Annex A (normative) !Sampling for product type determination test and for independent testing of consignments“ 19 A.1 General . 19 A.2 Sampling procedure for an assessment of product compliance . 19 A.2.1 Random sampling . 19 A.2.2 Representative sampling 19 A.2.3 Dividing the sample . 20 A.2.4 Num
35、ber of masonry units required for testing . 20 Annex B (normative) Cutting schemes . 21 B.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 s
36、trength . 22 Annex C (informative) Guidance on FPC frequencies. 23 Annex ZA (informative) !Clauses of this European Standard addressing the provisions of the EU Construction Products Regulation“ 25 ZA.1 Scope and relevant characteristics . 25 ZA.2 Procedure(s) for AVCP of Autoclaved Aerated Concrete
37、 masonry units 26 ZA.2.1 System(s) of AVCP 26 ZA.2.2 Declaration of performance (DoP) . 28 ZA.3 CE marking and labelling 32 Bibliography 35 BS EN 771-4:2011+A1:2015EN 771-4:2011+A1:2015 (E)EN 771-4:2011+A1:2015 (E) 4 European foreword This document (EN 771-4:2011+A1:2015) has been prepared by Techni
38、cal Committee CEN/TC 125 “Masonry”, the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2016, and conflicting national standards shall be withdrawn at
39、 the latest by May 2017. Attention is drawn 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. This document supersedes !EN 771-4:2011“. This document inclu
40、des Amendment 1 approved by CEN on 2015-01-11. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. !This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association and supports basic requ
41、irements for construction works of the EU Construction Products Regulation (Regulation (EU) No 305/2011). For relationship with EU Regulation/Directive(s), see informative Annex ZA, which is an integral part of this document.“ This European Standard also takes into account the general rules for rein
42、forced and unreinforced masonry in Eurocode 6. 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 (Dense and light weight aggregates) Part 4: Autoclaved aerated concrete masonry units Part 5:
43、 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 implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark
44、, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 771-4:2011+A1:
45、2015 (E) 5 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 including single leaf
46、, 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). !This European Standard includes AAC masonry units with an incorporated insulation not
47、exposed to fire, and masonry units of an overall rectangular parallelepiped shape, specially shaped and accessory units. AAC masonry units may consist of layers of different densities where not all of the layers are loadbearing.“ !It provides for the assessment and verification of constancy of perfo
48、rmance (AVCP) 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 with an incorporated thermal insulation materia
49、l 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 deviations 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 The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited app
