1、BSI Standards PublicationBS EN 771-3:2011Specification for masonry unitsPart 3: Aggregate concrete masonry units(Dense and lightweight aggregates)BS EN 771-3:2011+A1:2015BS EN 771-3:2011+A1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 771-3:2011+A1:2015.
2、 It supersedes BS EN 771-3:2011, which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags.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 771-3:201
3、1+A1:2015 is a “harmonized” 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 Regulation (Regulation (EU) No 305/2011).EN 771-3 was the subject of transitional arrangements a
4、greed under the Commission mandate. 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was: BS 6073-1:1981, Precast concrete masonry units Part 1: Specification for precast concrete masonry units;which was withdrawn in 2005.The UK participation in its preparation was entrusted by Technical Committee B/5
5、19, Masonry and associated testing, to Subcommittee B/519/1, Masonry units.A list of organizations represented on this subcommittee can be obtained on request to its secretary.EN 771-3 specifies the characteristics and performance requirements for aggregate concrete masonry units available throughou
6、t the CEN member countries. It aims to do so in product performance terms, avoiding as far as possible prescriptive requirements but permitting all the traditional designations of aggregate concrete units available throughout Europe. The concept of the declared value has been introduced. This is the
7、 value for the various properties 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, aggregate concrete maso
8、nry 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 771-3 and BS 6073-1. Nothing in this annex should be construed as specifying requirements other than those contained in the normative p
9、arts 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 pro
10、duct 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
11、 that the product will be used, do need to be stated.BS EN 771-3:2011+A1:2015BRITISH STANDARDThis standard has been written as a performance standard, unlike BS 6073-1, which was a combination of performance and recipe, leading to the following changes. There are no standard product sizes given and
12、the distinction between brick and block has been removed. These names have been replaced by the term “masonry units”. The order in which the dimensions of blocks are specified has been changed from “length, height and thickness” to “length, width (previously called thickness) and height”. Tolerance
13、categories on the manufacturers declared dimensions are specified. The limit on shell thickness for blocks and the limits on void percentages for bricks have been removed but the manufacturer is required to declare one of the groups defined in EN 1996-1-1 and/or the configuration in 5.3.1 of this st
14、andard. The manufacturer is required to declare the gross dry density of a unit and, when appropriate, the net dry density of the concrete. The tolerance on these declared values is given. The limit on minimum strength has been removed but the manufacturer has to declare the strength together with t
15、he category of unit. The limit on drying shrinkage has been removed and replaced by a requirement for manufacturers to declare the moisture movement value when units are marketed for structural purposes. When relevant the manufacturer has to declare the thermal properties, freeze/thaw durability, wa
16、ter absorption by capillarity and water vapour permeability of units. The manufacturer has to declare the reaction to fire class of a unit, and when intended to be used in structural masonry, its bond strength. A requirement for flexural bond strength of masonry units in combination with mortar has
17、been included and is applicable only when required by national provisions valid in the intended place of use and relevant to the application. A requirement, where national provisions exist, for a declaration on release and/or content of dangerous substances. A requirement for the manufacturer to est
18、ablish product conformity with its declared properties is included in this standard. This requires both product type determination and the operation of continuing factory production control procedures that have to be fully documented. An outline is included in 8. An informative annex, Annex ZA, is i
19、ncluded which indicates those clauses in this “harmonized” Standard and the procedures to be followed in order to CE mark a product.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Instit
20、ution 2016. Published by BSI Standards Limited 2016ISBN 978 0 580 79495 7ICS 91.100.30BS EN 771-3:2011+A1:2015 BRITISH STANDARDCompliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy
21、 Committee on 31 October 2011.Amendments/corrigenda issued since publicationDate Text affected31 March 2016 Implementation of CEN amendment A1:2015. National Foreword and National Annex NA also updatedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 771-3:2011+A1 August 2015 ICS 91.100.30 Supers
22、edes EN 771-3:2011English Version Specification for masonry units - Part 3: Aggregate concrete masonry units (Dense and lightweight aggregates) Spcifications pour lments de maonnerie - Partie 3: lments de maonnerie en bton de granulats (granulats courants et lgers) Festlegungen fr Mauersteine - Teil
23、 3: Mauersteine aus Beton (mit dichten und porigen Zuschlgen) This European Standard was approved by CEN on 10 March 2011 and includes Amendment 1 approved by CEN on 11 January 2015. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving t
24、his 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official
25、 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Aus
26、tria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, 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, Swed
27、en, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CE
28、N national Members. Ref. No. EN 771-3:2011+A1:2015 EEN 771-3:2011+A1:2015 (E) 3 8.3.5 Production process . 19 8.3.6 Finished product testing . 19 8.3.7 Statistical techniques 19 8.3.8 Marking and stock control of products . 19 8.3.9 Traceability . 19 8.3.10 Nonconforming products . 19 Annex A (norma
29、tive) !Sampling for determination of product type and for independent testing of consignments“ 20 A.1 General . 20 A.2 Sampling procedure 20 A.2.1 General . 20 A.2.2 Random sampling . 20 A.2.3 Representative sampling 20 A.2.4 Dividing the sample . 21 A.2.5 Number of units required for testing . 21 A
30、.3 Place and dates of inspection and testing 22 Annex B (normative) !Compliance criteria for product type determination and for independent testing of consignments“ 23 B.1 Dimensions and tolerances (see 5.2) 23 B.2 Configuration and appearance (see 5.3) . 23 B.3 Density (see 5.4) 23 B.4 Mechanical s
31、trength (see 5.5) 23 B.4.1 Characteristic strength . 23 B.4.2 Mean strength 23 B.5 Moisture movement and water absorption by capillarity (see 5.9 and 5.8) . 23 Annex C (informative) Examples of different shapes of aggregate concrete masonry units . 27 Annex D (informative) Guidance for test frequenc
32、ies for designing a FPC system to demonstrate conformity of finished products with the requirements of the standard and the declaration of the manufacturer 28 Annex ZA (informative) !Clauses of this European Standard addressing the provisions of the EU Construction Products Directive“ 30 ZA.1 Scope
33、and relevant characteristics . 30 ZA.2 Procedure for AVCP of aggregate concrete masonry units . 32 ZA.2.1 System(s) of AVCP 32 ZA.2.2 Declaration of performance (DoP) . 33 ZA.3 CE marking and labelling 38 Bibliography 41 EN 771-3:2011+A1:2015 (E) 2 Contents Page European foreword .4 1 Scope 5 2 Norm
34、ative references 5 3 Terms, definitions and symbols .6 3.1 Terms and definitions .6 3.2 Symbols 8 4 Materials .8 5 Requirements for aggregate concrete masonry units .9 5.1 General 9 5.2 Dimensions and tolerances 9 5.2.1 Dimensions .9 5.2.2 Dimensional tolerances . 10 5.3 Configuration and appearance
35、 10 5.3.1 Configuration 10 5.3.2 Appearance . 11 5.4 Density . 11 5.4.1 Gross dry density of the units . 11 5.4.2 Net dry density of the concrete . 12 5.4.3 Tolerances . 12 5.5 Mechanical strength . 12 5.5.1 Compressive strength 12 5.5.2 Bending tensile strength 13 5.6 Thermal properties . 13 5.7 Du
36、rability . 13 5.8 Water absorption by capillarity . 14 5.9 Moisture movement 14 5.10 Water vapour permeability . 14 5.11 Reaction to fire 14 5.12 Shear bond strength . 14 5.12.1 General . 14 5.12.2 Declaration based on fixed values 15 5.12.3 Declaration based on tests 15 5.13 Flexural bond strength
37、. 15 5.14 Dangerous substances 15 6 Description, designation and classification of aggregate concrete masonry units 15 6.1 Description and designation of units . 15 6.2 Classification . 16 7 Marking 16 8 !Assessment and verification of constancy of performance (AVCP)“ 16 8.1 General . 16 8.2 !Produc
38、t type determination“ 17 8.3 Factory production control 18 8.3.1 General . 18 8.3.2 Testing and measuring equipment . 18 8.3.3 Production equipment 18 8.3.4 Raw materials 18 BS EN 711-3:2011+A1:2015EN 771-3:2011+A1:2015 (E) 3 8.3.5 Production process . 19 8.3.6 Finished product testing . 19 8.3.7 St
39、atistical techniques 19 8.3.8 Marking and stock control of products . 19 8.3.9 Traceability . 19 8.3.10 Nonconforming products . 19 Annex A (normative) !Sampling for determination of product type and for independent testing of consignments“ 20 A.1 General . 20 A.2 Sampling procedure 20 A.2.1 General
40、 . 20 A.2.2 Random sampling . 20 A.2.3 Representative sampling 20 A.2.4 Dividing the sample . 21 A.2.5 Number of units required for testing . 21 A.3 Place and dates of inspection and testing 22 Annex B (normative) !Compliance criteria for product type determination and for independent testing of con
41、signments“ 23 B.1 Dimensions and tolerances (see 5.2) 23 B.2 Configuration and appearance (see 5.3) . 23 B.3 Density (see 5.4) 23 B.4 Mechanical strength (see 5.5) 23 B.4.1 Characteristic strength . 23 B.4.2 Mean strength 23 B.5 Moisture movement and water absorption by capillarity (see 5.9 and 5.8)
42、 . 23 Annex C (informative) Examples of different shapes of aggregate concrete masonry units . 27 Annex D (informative) Guidance for test frequencies for designing a FPC system to demonstrate conformity of finished products with the requirements of the standard and the declaration of the manufacture
43、r 28 Annex ZA (informative) !Clauses of this European Standard addressing the provisions of the EU Construction Products Directive“ 30 ZA.1 Scope and relevant characteristics . 30 ZA.2 Procedure for AVCP of aggregate concrete masonry units . 32 ZA.2.1 System(s) of AVCP 32 ZA.2.2 Declaration of perfo
44、rmance (DoP) . 33 ZA.3 CE marking and labelling 38 Bibliography 41 EN 771-3:2011+A1:2015 (E) 2 Contents Page European foreword .4 1 Scope 5 2 Normative references 5 3 Terms, definitions and symbols .6 3.1 Terms and definitions .6 3.2 Symbols 8 4 Materials .8 5 Requirements for aggregate concrete mas
45、onry units .9 5.1 General 9 5.2 Dimensions and tolerances 9 5.2.1 Dimensions .9 5.2.2 Dimensional tolerances . 10 5.3 Configuration and appearance 10 5.3.1 Configuration 10 5.3.2 Appearance . 11 5.4 Density . 11 5.4.1 Gross dry density of the units . 11 5.4.2 Net dry density of the concrete . 12 5.4
46、.3 Tolerances . 12 5.5 Mechanical strength . 12 5.5.1 Compressive strength 12 5.5.2 Bending tensile strength 13 5.6 Thermal properties . 13 5.7 Durability . 13 5.8 Water absorption by capillarity . 14 5.9 Moisture movement 14 5.10 Water vapour permeability . 14 5.11 Reaction to fire 14 5.12 Shear bo
47、nd strength . 14 5.12.1 General . 14 5.12.2 Declaration based on fixed values 15 5.12.3 Declaration based on tests 15 5.13 Flexural bond strength . 15 5.14 Dangerous substances 15 6 Description, designation and classification of aggregate concrete masonry units 15 6.1 Description and designation of
48、units . 15 6.2 Classification . 16 7 Marking 16 8 !Assessment and verification of constancy of performance (AVCP)“ 16 8.1 General . 16 8.2 !Product type determination“ 17 8.3 Factory production control 18 8.3.1 General . 18 8.3.2 Testing and measuring equipment . 18 8.3.3 Production equipment 18 8.3
49、.4 Raw materials 18 BS EN 711-3:2011+A1:2015EN 771-3:2011+A1:2015 (E) 4 European foreword This document (EN 771-3:2011+A1:2015) 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 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 the latest by May 2017. Attention is drawn to the possibility that some of the elements of this document
