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1、BRITISH STANDARD BS EN 771-2:2001 Specification for masonry units Part 2: Calcium silicate masonry units The European Standard EN 771-2:2000 has the status of a British Standard ICS 91.100.15 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldu
2、n, na, Tue Nov 07 06:46:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 771-2:2001 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 effect on 15
3、May 2001 BSI 05-2001 ISBN 0 580 37156 5 National foreword This British Standard is the official English text version of the “ordinary” version of EN 771-2. This edition of EN 771-2 will be superseded in due course by a “Harmonized European Standard” EN 771-2 which fully takes into account the requir
4、ements of the European Commission mandate M116 for masonry products. EN 771-2 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 national regul
5、ations, the Member States have agreed a transition period of 21 months for the co-existence of: BS 187:1978, Specification for calcium silicate (sandlime and flintlime) bricks; BS 6649:1985, Specification for clay and calcium silicate modular bricks; and the future “Harmonized European Standard” EN
6、771-2. At the end of this period BS 187 and BS 6649 will be withdrawn, and this will be notified in Update Standards.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 associated tests, to Subcommittee B/519/1, Masonry units, which has the responsibility
7、 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 differences between BS EN 771-2 and BS 187. Nothing in this National Annex should be con
8、strued 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 document may be found in the BSI Standards Catalogue under the section entitled
9、 “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. BS 187:1978, Specification for calcium silicate (sandlime and flintlime) bricks; BS 4729, Specification for dimensions of bricks of special shapes and sizes; BS 5628, Code of p
10、ractice for use of masonry; BS 6649:1985, Specification for clay and calcium silicate modular bricks; BS EN 772-1, Methods of test for masonry units Part 1: Determination of compressive strength; BS EN 772-18, Methods of test for masonry units Part 18: Determination of freeze-thaw resistance of calc
11、ium silicate masonry units; DD ENV 1996-1, Eurocode 6 Design of masonry structures General rules for buildings. 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. Compliance with a Briti
12、sh 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 international and European deve
13、lopments 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 27 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication
14、 Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 771-2 March 2000 ICS 91.100.15 English version Specification for masonry units Part 2: Calcium silicate masonry units
15、 Spcifications pour lments de maonnerie Partie 2: Elments de maonnerie en silico-calcaire Festlegungen fr Mauersteine Teil 2: Kalksandsteine This European Standard was approved by CEN on 17 February 2000. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the c
16、onditions 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 member. This European Standard exists in th
17、ree 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 members are the national standards bodies of A
18、ustria, 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 NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central
19、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 771-2:2000 E Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN
20、771-2:2000 BSI 05-2001 ContentsPage Foreword. 3 1 Scope 4 2 Normative references 5 3 Definitions and symbols .6 4 Materials and manufacture .9 5 Requirements for calcium silicate masonry units 9 6 Description, designation and classification of calcium silicate masonry units 12 7 Marking . 13 8 Evalu
21、ation of conformity.13 Annex A (normative) Sampling for initial type testing and for independent testing of consignments 15 Annex B (normative) Cutting schemes.17 Annex C (normative) Tolerances on Accessory Units 19 Annex D (informative) Classification systems .23 Licensed Copy: sheffieldun sheffiel
22、dun, na, Tue Nov 07 06:46:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 771-2:2000 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 nation
23、al standard, either by publication of an identical text or by endorsement, at the latest 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
24、countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. The annexes A, B and C of this European Standar
25、d are normative, annex D is informative. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 771-2:2000 BSI 05-2001 1Scope This European Standard specifies the characteristics and performance requirements of calcium silicate masonry un
26、its for which the main intended uses are inner walls, outer walls, cellars, foundations and chimneys, including those of an overall non-rectangular parallelepiped shape, specially shaped and accessory units. This European Standard is intended to apply to all calcium silicate masonry units. This Euro
27、pean Standard does not cover units with more than 60 % volume of voids. This European Standard does not cover products made from shale as a major raw material. This European Standard does not cover storey height panels. This European Standard does not cover units intended for use as a damp proof cou
28、rse. This European Standard does not specify standard sizes for calcium silicate masonry units, nor standard work dimensions. This European Standard does not cover units with an incorporated thermal insulating material placed on a face susceptible to be exposed to fire. It defines the performance re
29、lated to strength, density, dimensional accuracy, geometry and freeze/thaw resistance, measured 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 pro
30、ducts covered by this European Standard is also included. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 771-2:2000 BSI 05-2001 2Normative references This European Standard incorporates by dated or undated references, provisions f
31、rom 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 Standard only when incorporated in it by amend
32、ment or revision. For undated references the latest edition of the publication referred to applies. prEN 772-1:1999, Methods of test for masonry units Part 1: Determination of compressive strength EN 772-9, Methods of test for masonry units Part 9: Determination of volume and percentage of voids and
33、 net volume of calcium silicate units by sand filling prEN 772-13, Methods of test for masonry units Part 13: Determination of net and gross dry density of masonry units (except for natural stone) prEN 772-16, Methods of test for masonry units Part 16: Determination of dimensions EN 772-18:2000, Met
34、hods of test for masonry units Part 18: Determination of freeze-thaw resistance of calcium silicate masonry units 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 Licensed Copy:
35、sheffieldun sheffieldun, na, Tue Nov 07 06:46:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 6 EN 771-2:2000 BSI 05-2001 3Definitions and symbols For the purposes of this European Standard, the following definitions apply. 3.1Unit related definition 3.1.1 masonry unit preformed component intende
36、d for use in masonry construction 3.2Material related definition 3.2.1 calcium silicate masonry unit masonry unit made predominantly from lime and siliceous materials, agglomerated and combined by the action of steam under pressure (see clause 4) 3.2.2 shale fine grained sedimentary rock, finely lam
37、inated and consisting of mainly quartz and clay minerals Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 7 EN 771-2:2000 BSI 05-2001 3.3Size related definitions 3.3.1 dimensions and surfaces dimensions and surfaces of a calcium silicate
38、 masonry unit are defined by reference to Figure 1. Figure 1 relates to the normal use of the masonry unit in a wall NOTE Calcium silicate masonry units may be provided with recesses, tongued and grooved jointing systems. 1 2 4 6 5 3 Key 1 Width 2 Height 3 Length 4 Bed 5 Face 6 Header NOTE This rela
39、tes to the normal use of the masonry in the wall. 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 a masonry unit specified for its manufacture, to which the ac
40、tual size conforms within permissible deviations 3.3.4 actual size size of a masonry unit as measured 3.4Shape related definitions 3.4.1 regular shaped masonry unit masonry unit with an overall rectangular parallelepiped shape Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:06 GMT+00:00
41、 2006, Uncontrolled Copy, (c) BSI Page 8 EN 771-2:2000 BSI 05-2001 3.4.2 specially shaped masonry unit masonry unit which is not rectangular parallelepiped 3.4.3 accessory unit masonry unit which is shaped to provide a particular function, e.g. to complete the geometry of the masonry. It may be obta
42、ined by cutting a large unit 3.4.4 hole formed void which may or may not pass completely through a masonry unit 3.4.5 perforation formed void which passes completely through a masonry unit 3.4.6 cell formed void which does not pass through a masonry unit 3.4.7 frog depression formed in one or both f
43、aces of a unit, the total volume of which does not exceed 20 % of the gross volume of the unit 3.4.8 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) 3.4.9 shell periphe
44、ral material between the hole(s) and the outer surfaces of a masonry unit 3.4.10 web solid material between the holes in a masonry unit 3.5Other definitions 3.5.1 declared value value that a manufacturer is confident of achieving, bearing in mind the precision of the test and the variability of the
45、manufacturing process Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 07 06:46:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 9 EN 771-2:2000 BSI 05-2001 3.6Symbols f=declared compressive strength (N/mm2) fi=individual compressive strength (N/mm2) fb=normalized compressive strength (N/mm2) ?
46、=slanting angle accessory units l=length (mm) w=width (mm) h=height (mm) 4Materials and manufacture Calcium silicate masonry units are produced from a mixture of lime and natural siliceous materials (sand, crushed or uncrushed siliceous gravel or rock or a mixture thereof), agglomerated and combined
47、 by the action of steam under pressure. The use of pigments in order to produce coloured units is permitted. Other ingredients can be added for particular improvements of characteristics of the product. Calcium silicate masonry units produced with a majority of other siliceous materials are permitte
48、d if these materials have no deleterious effect on the properties of the product (see 8.3.2). The presence of such a material shall be declared. 5Requirements for calcium silicate masonry units 5.1General The requirements and properties specified in this European Standard shall be defined in terms o
49、f the test methods and other procedures referred to in this European Standard. The method of sampling and the number of test specimens required is given in Table A.1. The conformity criteria given in the following sub-clauses relate to initial type tests (see 8.2) and consignment testing (see annex A). For production evaluation the manufacturer shall define the conformity criteria in the factory production control documentation (see 8.3). It should be noted that the test methods are not always applicable to