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1、BRITISH STANDARD BS EN 771-4:2001 Specification for masonry units Part 4: Autoclaved aerated concrete masonry units The European Standard BS EN 771-4:2000 has the status of a British Standard ICS 91.100.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffiel
2、dun sheffieldun, na, Tue Nov 07 06:46:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 771-4:2001 This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into
3、 effect on 15 May 2001 BSI 05-2001 ISBN 0 580 37157 3 National foreword This British Standard is the official English text version of the “ordinary” version of EN 771-4. This edition of EN 771-4 will be superseded in due course by a “Harmonized European Standard” EN 771-4 which fully takes into acco
4、unt the requirements of the European Commission mandate M116 for masonry products. EN 771-4 is the subject of transitional arrangements agreed under the Commission mandate which is intended to lead to CE marking in support of the Construction Products Directive. In order to allow for any changes in
5、national regulations, the Member States have agreed a transition period of 21 months for the co-existence of: BS 6073-1:1981, Precast concrete masonry units Part 1: Specification for precast concrete masonry units; BS 6073-2:1981, Precast concrete masonry units Part 2: Method for specifying precast
6、concrete masonry units; and the future “Harmonized European Standard” EN 771-4. At the end of this period BS 6073-1 and BS 6073-2 will be withdrawn, and this will be notified in Update Standards. The UK participation in its preparation was entrusted by Technical Committee B/519, Masonry and associat
7、ed tests, to Subcommittee B/519/1, Masonry units, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Additional information National Annex NA to this British Standard provides informative commentary on the difference
8、s between BS EN 771-4 and BS 6073. Nothing in this National annex should be construed as specifying requirements other than those given in the normative parts of this European Standard. Cross-references The British Standards which implement international or European publications referred to in this
9、document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. Informative references BS 6073-1:1981, Precast concrete masonry units Part 1: Specification for c
10、oncrete masonry units. BS 6073-2:1981, Precast concrete masonry units Part 2: Method for specifying precast concrete masonry units. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Com
11、pliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related internation
12、al and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 19 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issu
13、ed since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 771-4 March 2000 ICS 91.100.30 English version Specification for masonry units Part 4: Autoclaved
14、 aerated concrete masonry units Spcifications pour lments de maonnerie Partie 4: Elments de maonnerie en bton cellulaire autoclav Festlegungen fr Mauersteine Teil 4: Porenbetonsteine This European Standard was approved by CEN on 17 February 2000. CEN members are bound to comply with the CEN/CENELEC
15、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 application to the Central Secretariat or to any CEN m
16、ember. 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 Central Secretariat has the same status as the official versions. CEN memb
17、ers are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATI
18、ON EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 771-4:2000 E Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:07 GMT+00:00 2
19、006, Uncontrolled Copy, (c) BSI Page 2 EN 771-4:2000 BSI 05-2001 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Definitions and symbols 4 4 Materials and manufacture 6 5 Requirements for AAC masonry units. 7 6 Description, designation and classification of AAC masonry units. 10 7 Mark
20、ing . 10 8 Evaluation of conformity 11 Annex A (normative) Sampling for initial type testing and for independent testing of consignments 13 Annex B (normative) Cutting schemes . 15 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 77
21、1-4:2000 BSI 05-2001 Foreword This European Standard 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 la
22、test by September 2000, and conflicting national standards shall be withdrawn at the latest by September 2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Rep
23、ublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. The annexes A and B of this European Standard are normative. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:07 GMT+00
24、:00 2006, Uncontrolled Copy, (c) BSI Page 4 BS EN 771-4:2001 BSI 05-2001 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 loadbearing and non-loadbearin
25、g applications in all forms of walling including single leaf, cavity, partitions, retaining, basement and general use below ground level, including walling for fire protection, thermal insulation, sound insulation and chimneys. It defines the performance related to strength, density, dimensional acc
26、uracy, thermal conductivity, moisture movement and it also gives guidance on freeze/thaw resistance according to the corresponding test methods contained in separate European Standards. It provides for the evaluation of conformity of the product to this European Standard. The marking requirement for
27、 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 insulating material bonded to the faces of the unit. It does not specify standard sizes for autoclaved
28、 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 dpc. 2 Normative references This European Standard incorporates
29、by dated or undated reference, provisions from other publications. These normative references 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 Sta
30、ndard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 680, Determination of the drying shrinkage of autoclaved aerated concrete. prEN 772-1:1999, Methods of test for masonry units Part 1: Determination of com
31、pressive strength. EN 772-10, Methods of test for masonry units Part 10: Determination of moisture content of calcium silicate and autoclaved aerated concrete units. prEN 772-13, Methods of test for masonry units Part 13: Determination of net and gross dry density of masonry units (except for natura
32、l stone). prEN 772-16, Methods of test for masonry units Part 16: Determination of dimensions. prEN 998-2, Specification for mortar for masonry Part 2: Masonry mortar. prEN 1745, Masonry and masonry products Methods for determining declared and design thermal values. 3 Definitions and symbols For th
33、e purpose of this European Standard, the following definitions apply. 3.1 Unit related definition 3.1.1 masonry unit preformed component intended for use in masonry construction 3.2 Material related definitions Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:07 GMT+00:00 2006, Uncontrol
34、led Copy, (c) BSI Page 5 EN 771-4:2000 BSI 05-2001 3.2.1 AAC masonry unit masonry unit manufactured from hydraulic binders such as cement and/or lime, combined with siliceous based fine material, cell generating material and water NOTE AAC masonry units may be provided with recesses, tongued and gro
35、oved jointing systems and other interlocking features. 3.3 Size related definitions 3.3.1 dimensions dimensions of an AAC masonry unit are defined by reference to Figure 1 1 2 4 6 5 3 Key 1 Width 2 Height 3 Length 4 Bed 5 Face 6 Header NOTE This relates to the normal use of the masonry in the wall.
36、Figure 1 Dimensions and surfaces 3.3.2 co-ordinating size size of the co-ordinating space allocated to a masonry unit including allowances for joints and tolerances 3.3.3 work size size of masonry unit specified for its manufacture, to which the actual size conforms within permissible deviations 3.3
37、.4 actual size size of a masonry unit as measured Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 BS EN 771-4:2001 BSI 05-2001 3.4 Shape related definitions 3.4.1 regular shaped masonry unit masonry unit with an overall rectangular pa
38、rallelepiped shape 3.4.2 specially shaped masonry unit masonry unit which is not a rectangular parallelepiped 3.4.3 accessory unit masonry unit which is shaped to provide a particular function 3.4.4 interlocking features shaped matched projections and indentations on masonry units, e.g. tongue and g
39、roove systems 3.4.5 hole formed void which may or may not pass completely through a masonry unit 3.4.6 vertical perforation formed void which passes completely through a masonry unit perpendicular to the bed face 3.4.7 horizontal perforation formed void which passes completely through a masonry unit
40、 parallel to the bed faces 3.4.8 cell formed void which does not pass through a masonry unit 3.4.9 recess depression or indentation in one or more surfaces of a masonry unit (e.g. mortar pocket, rendering keyway, groove to provide a discontinuity in the mortar joint, grip hole) 3.5 Other definitions
41、 declared value declared value is that value that a manufacturer is confident of achieving, bearing in mind the precision of test and variability of the manufacturing process 3.6 Symbols fb = normalized compressive strength (N/mm) 4 Materials and manufacture 4.1 General AAC masonry units shall be ma
42、nufactured using hydraulic binders such as cement and/or lime combined with fine siliceous based material, cell-generating material and water. NOTE The raw materials are mixed together and cast into moulds where the mix is allowed to rise and set into cakes. After this part of the process, the cake
43、is cut into the required sizes of masonry units and cured with high pressure steam in autoclaves. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 7 EN 771-4:2000 BSI 05-2001 4.2 Materials of manufacture The following materials of manufa
44、cture combined with additives and agents where appropriate may be used in the manufacturing process: siliceous based material; cement; lime; water; cell-generating material. Other materials may also be included in the manufacturing process. 5 Requirements for AAC masonry units 5.1 General The requir
45、ements and properties specified in this standard shall be defined in terms of test methods and other procedures referred to in this European Standard. It should be noted that the test methods are not always applicable to specially shaped and accessory units (see 3.4.2 and 3.4.3). The conformity crit
46、eria given in the following sub-clauses relate to initial type tests (see 8.2) and to consignment testing (see annex A). For production evaluation the manufacturer shall define the conformity criteria in the factory production control documentation (see 8.3). 5.2 Dimensions and tolerances 5.2.1 Dime
47、nsions The dimensions of an AAC masonry unit shall be declared in mm for length, width and height, in that order. They shall be given in terms of work size and in addition the co-ordinating size may be given. AAC masonry units shall be sampled in accordance with annex A and tested in accordance with
48、 prEN 772-16. The deviation of the measured dimensions from the declared dimensions shall not exceed the value given in Table 2. The declared dimensions shall not exceed the value given in Table 1. Table 1 Maximum dimensions for AAC masonry units Dimensions mm Length1 500 Width500 Height1 000 Licens
49、ed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:07 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 8 BS EN 771-4:2001 BSI 05-2001 5.2.2 Tolerances 5.2.2.1 Permissible deviations for regular shaped units The permissible deviations for individual masonry units shall be as given in Table 2 for mortar specified in accordance with prEN 998-2. Table 2 Permissible deviations for regular shaped units AAC units for erection with joints made of:Dimensions General purpose and lightweight mortarThin layer mortar Length