EN 772-1-2011 en Methods of test for masonry units - Part 1 Determination of compressive strength (Incorporates Amendment A1 2015)《圬工品试验方法 第1部分 压缩强度测定》.pdf

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1、BSI Standards PublicationBS EN 772-1:2011Methods of test for masonryunitsPart 1: Determination of compressivestrengthBS EN 772-1:2011+A1:2015BS EN 772-1:2011+A1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 772-1:2011+A1:2015. It supersedes BS EN 772-1:20

2、11 which is withdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags.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 .The UK participation in its preparation wa

3、s entrusted by Technical Committee B/519, 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.This publication does not purport to include all the necessary provisions of a contra

4、ct. Users are responsible for its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015ISBN 978 0 580 84584 0ICS 91.100.25Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the auth

5、ority of the Standards Policy and Strategy Committee on 31 May 2011.Amendments/corrigenda issued since publicationDate Text affected31 July 2015 Implementation of CEN amendment A1:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 772-1:2011+A1 June 2015 ICS 91.100.25 Supersedes EN 772-1:2011E

6、nglish Version Methods of test for masonry units - Part 1: Determination of compressive strength Mthodes dessai des lments de maonnerie - Partie 1: Dtermination de la rsistance la compression Prfverfahren fr Mauersteine - Teil 1: Bestimmung der Druckfestigkeit This European Standard was approved by

7、CEN on 25 December 2010 and includes Amendment 1 approved by CEN on 14 May 2015. 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 b

8、ibliographical 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 versions (English, French, German). A version in any other language made by translation under the res

9、ponsibility 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 Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav R

10、epublic 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NO

11、RMALISATION 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 CEN national Members. Ref. No. EN 772-1:2011+A1:2015 EEN 772-1:2011+A1:2015 (E) 2 Contents Page Foreword

12、 3 1 Scope 4 2 Normative references 4 3 Principle 4 4 Symbols 4 5 Materials .5 6 Apparatus .5 6.1 Testing machine.5 6.2 Weighing instrument .5 6.3 Sufficient stiff steel strips .5 7 Preparation of specimens .5 7.1 Sampling .5 7.2 Surface preparation .6 7.2.1 General 6 7.2.2 Removal of tongues and gr

13、ooves 6 7.2.3 Preparation of masonry units containing frogs and which are not to be capped 6 7.2.4 Grinding 6 7.2.5 Capping .7 7.3 Conditioning of specimens before testing 8 7.3.1 General 8 7.3.2 Conditioning to the air dry condition.8 7.3.3 Conditioning to the oven dry condition 8 7.3.4 Conditionin

14、g to 6 % moisture content .8 7.3.5 Conditioning by immersion 9 7.4 Loaded area 9 7.4.1 Gross area 9 7.4.2 Net loaded area of units containing frogs intended to be filled with mortar in practice 9 8 Procedure .9 8.1 Placing specimens in the testing machine .9 8.2 Loading .9 9 Calculation and expressi

15、on of results 10 10 Evaluation of results 10 11 Test report . 10 Annex A (informative) Conversion of the compressive strength of masonry units to the normalised compressive strength 12 Annex B (normative) Surface preparation and conditioning of units . 13 BS EN 772-1:2011+A1:2015EN 772-1:2011+A1:201

16、5 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Principle 4 4 Symbols 4 5 Materials .5 6 Apparatus .5 6.1 Testing machine.5 6.2 Weighing instrument .5 6.3 Sufficient stiff steel strips .5 7 Preparation of specimens .5 7.1 Sampling .5 7.2 Surface preparation .6 7.2.1 General 6 7

17、.2.2 Removal of tongues and grooves 6 7.2.3 Preparation of masonry units containing frogs and which are not to be capped 6 7.2.4 Grinding 6 7.2.5 Capping .7 7.3 Conditioning of specimens before testing 8 7.3.1 General 8 7.3.2 Conditioning to the air dry condition.8 7.3.3 Conditioning to the oven dry

18、 condition 8 7.3.4 Conditioning to 6 % moisture content .8 7.3.5 Conditioning by immersion 9 7.4 Loaded area 9 7.4.1 Gross area 9 7.4.2 Net loaded area of units containing frogs intended to be filled with mortar in practice 9 8 Procedure .9 8.1 Placing specimens in the testing machine .9 8.2 Loading

19、 .9 9 Calculation and expression of results 10 10 Evaluation of results 10 11 Test report . 10 Annex A (informative) Conversion of the compressive strength of masonry units to the normalised compressive strength 12 Annex B (normative) Surface preparation and conditioning of units . 13 EN 772-1:2011+

20、A1:2015 (E) 3 Foreword This document (EN 772-1:2011+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,

21、at the latest by December 2015, and conflicting national standards shall be withdrawn at the latest by December 2015. 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

22、 any or all such patent rights. This document supersedes !EN 772-1:2011.“ This document includes Amendment 1 approved by CEN on 2015-04-14. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. There have been no technical changes compared to EN 772-1:2

23、000. The opportunity has been taken to introduce a normative Annex B which includes the methods of surface preparation and conditioning for each unit type. This information was previously available in the product specifications only, consequently EN 771-1 now becomes a stand-alone document. Accordin

24、g 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, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Gr

25、eece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 772-1:2011+A1:2015EN 772-1:2011+A1:2015 (E) 4 1 Scope This European Standard specifies a

26、method for determining the compressive strength of masonry units. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced docum

27、ent (including any amendments) applies. EN 771-1, Specification for masonry units Part 1: Clay masonry units EN 771-2, Specification for masonry units Part 2: Calcium silicate masonry units EN 771-3, Specification for masonry units Part 3: Aggregate concrete masonry units (Dense and lightweight aggr

28、egates) EN 771-4, Specification for masonry units Part 4: Autoclaved aerated concrete masonry units EN 771-5, Specification for masonry units Part 5: Manufactured stone masonry units EN 771-6, Specification for masonry units Part 6: Natural stone masonry units EN 772-2, Methods of test for masonry u

29、nits Part 2: Determination of percentage area of voids in aggregate concrete masonry units (by paper indentation) EN 772-10, Methods of test for masonry units Part 10: Determination of moisture content of calcium silicate and autoclaved aerated concrete units EN 772-13, Methods of test for masonry u

30、nits Part 13: Determination of net and gross dry density of masonry units (except for natural stone) EN 772-16, Methods of test for masonry units Part 16: Determination of dimensions EN 1015-11, Methods of test for mortar for masonry Part 11: Determination of flexural and compressive strength of har

31、dened mortar EN ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method (ISO 6507-1:2005) 3 Principle The specimens, after preparation, when needed, are laid and centred on the platen of a compression testing machine. A uniformly distributed load is applied and increased continuousl

32、y up to failure. 4 Symbols fb normalised compressive strength of masonry unit (N/mm2); d shape factor multiplier used to convert the air-dry compressive strength of the masonry specimens to the normalised compressive strength. BS EN 772-1:2011+A1:2015EN 772-1:2011+A1:2015 (E) 4 1 Scope This European

33、 Standard specifies a method for determining the compressive strength of masonry units. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition o

34、f the referenced document (including any amendments) applies. EN 771-1, Specification for masonry units Part 1: Clay masonry units EN 771-2, Specification for masonry units Part 2: Calcium silicate masonry units EN 771-3, Specification for masonry units Part 3: Aggregate concrete masonry units (Dens

35、e and lightweight aggregates) EN 771-4, Specification for masonry units Part 4: Autoclaved aerated concrete masonry units EN 771-5, Specification for masonry units Part 5: Manufactured stone masonry units EN 771-6, Specification for masonry units Part 6: Natural stone masonry units EN 772-2, Methods

36、 of test for masonry units Part 2: Determination of percentage area of voids in aggregate concrete masonry units (by paper indentation) EN 772-10, Methods of test for masonry units Part 10: Determination of moisture content of calcium silicate and autoclaved aerated concrete units EN 772-13, Methods

37、 of test for masonry units Part 13: Determination of net and gross dry density of masonry units (except for natural stone) EN 772-16, Methods of test for masonry units Part 16: Determination of dimensions EN 1015-11, Methods of test for mortar for masonry Part 11: Determination of flexural and compr

38、essive strength of hardened mortar EN ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method (ISO 6507-1:2005) 3 Principle The specimens, after preparation, when needed, are laid and centred on the platen of a compression testing machine. A uniformly distributed load is applied and

39、 increased continuously up to failure. 4 Symbols fb normalised compressive strength of masonry unit (N/mm2); d shape factor multiplier used to convert the air-dry compressive strength of the masonry specimens to the normalised compressive strength. EN 772-1:2011+A1:2015 (E) 5 5 Materials Sand with a

40、 maximum grain size of 1 mm. Cement 6 Apparatus 6.1 Testing machine that conforms to the requirements of Table 1. Table 1 Requirements for testing machines Maximum permissible repeatability of forces as percentage of indicated force % Maximum permissible mean error of forces as percentage of indicat

41、ed force % Maximum permissible error of zero force as percentage of maximum force of range % 2,0 2,0 0,4 The testing machine shall have adequate capacity to crush all the test specimens, but the scale used shall be such that the failure load on the specimen exceeds one-fifth of the full scale readin

42、g. The machine shall be provided with a load-pacer or equivalent means to enable the load to be applied at the rate given in 8.2. The testing machine shall be equipped with two steel-bearing platens. The stiffness of the platens and the manner of load transfer shall be such that the deflection of th

43、e platen surfaces at failure load shall be less than 0,1 mm measured over 250 mm. The platens shall either be through hardened or the faces case hardened. The testing faces shall have a Vickers hardness of at least 600 HV when tested in accordance with EN ISO 6507-1. One platen of the machine shall

44、be able to align freely with the specimens as contact is made, but shall be restrained by friction or other means from tilting during loading. The other platen shall be a plane non-tilting block. The bearing faces of both platens shall be larger than the size of the largest specimen to be tested. Wh

45、ere auxiliary platens are used, they shall be properly located and of the same hardness, stiffness and planeness as the main platens. The bearing surfaces of the platens shall not depart from a plane by more than 0,05 mm. 6.2 Weighing instrument capable of weighing specimens to an accuracy of 0,1 %

46、of their mass. 6.3 Sufficient stiff steel strips for use on shell bedded or strip bedded ground units (See 8.1). 7 Preparation of specimens 7.1 Sampling The method of sampling shall be in accordance with the relevant part of EN 771. The minimum number of specimens shall be six, but a larger minimum

47、number may be specified in the product specification, in which case that larger number shall be used. In the case of large masonry units representative portions, e.g. cubes, may be cut from the masonry unit in different positions as stated in the relevant part of EN 771 (see also Note to 7.2.4). BS

48、EN 772-1:2011+A1:2015EN 772-1:2011+A1:2015 (E) 6 7.2 Surface preparation 7.2.1 General Specimens shall be tested in the orientation specified, and this shall be stated in the test report. For certain forms of construction, it will be necessary to test the masonry units in more than one orientation.

49、Where grinding in accordance with 7.2.4 significantly alters the contact surface or reduces the height significantly alternative approaches are required, see 7.2.4. Where it is not practicable to prepare clay HD units by grinding e.g. high strength units, the surface preparation may be carried out by capping in accordance with 7.2.5 After the removal of any superfluous material, e.g. flashing from the production process, the faces of the specimen, whether a whole masonry unit or a piece cut from a larger unit (