1、June 2007DEUTSCHE NORM English price group 10No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 91.080.30!,y4S“9861748www
2、.din.deDDIN EN 1052-3Methods of test for masonry Part 3: Determination of initial shear strength (includes AmendmentA1:2007)English version of DIN EN 1052-3:2007-06Prfverfahren fr Mauerwerk Teil 3: Bestimmung der Anfangsscherfestigkeit (Haftscherfestigkeit) (enthlt nderungA1:2007)Englische Fassung D
3、IN EN 1052-3:2007-06SupersedesDIN EN 1052-3:2002-10www.beuth.deDocument comprises 17 pages 09.07DIN EN 1052-3:2007-06 2 National foreword This standard has been prepared by CEN/TC 125 “Masonry” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normen
4、ausschuss Bauwesen (Building and Civil Engineering Standards Committee), Technical Committees NA 005-06-01 AA Mauerwerksbau and NA 005-06-04 AA Prfverfahren. This European Standard is part of a series of standards specifying methods of test for masonry. Amendment A1:2007 has been integrated in this
5、standard and is marked by a vertical line in the left margin. Amendments This standard differs from DIN EN 1052-3:2002-10 as follows: a) A further test procedure (Procedure B) has been included and clause 3 “Principle” has been amended accordingly. b) In 7.1, Table 2 and the specifications for Type
6、B specimens have been amended. c) In Figure 2, the formula for determining e has been changed. d) 8.2 has been further subdivided into 8.2.1 “Procedure A”, 8.2.2 “Procedure B” and 8.2.3 “Loading rate”. e) In 8.4, specifications for procedure B have been added. f) Clause 9 now includes an explanation
7、 of the symbols used. g) In clause 10, specifications for procedure B have been added. h) In clause 11, specifications for procedure B have been added. Previous editions DIN 18555-5: 1986-03 DIN EN 1052-3: 2002-10 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1052-3 July 2002 +A1 March 2007 I
8、CS 91.080.30 English version Methods of test for masonry Part 3: Determination of initial shear strength Mthodes dessai de la maonnerie Partie 3: Dtermination de la rsistance initiale au cisaillement Prfverfahren fr Mauerwerk Teil 3: Bestimmung der Anfangsscherfestigkeit (Haftscherfestigkeit) EN 105
9、2-3:2002 was approved by CEN on 2002-04-11 and Amendment A1 on 2007-02-03. 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 bibliog
10、raphical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CE
11、N member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latv
12、ia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, and the United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1
13、050 Brussels 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1052-3:2002 + A1:2007 EEN 1052-3:2002 + A1:2007 (E) 2 Contents Page Foreword to EN 1052-3:20023 Foreword to EN 1052-3:2002/A1:2007.3 1 Scope 3 2 Normative references
14、 3 3 Principle4 4 Terms, definitions and symbols.4 4.1 Terms and definitions .4 4.2 Symbols 4 5 Materials .5 5.1 Masonry units.5 5.2 Mortar5 6 Apparatus .6 7 Preparation and curing of specimens .6 7.1 Preparation of masonry specimens.6 7.2 Curing and conditioning of the specimens.7 8 Procedure .7 8.
15、1 Placing the specimens in the testing machine.7 8.2 Loading .9 8.3 Measurements and observations.9 8.4 Replications9 9 Calculations10 10 Evaluation of results .10 10.1 Procedure A10 10.2 Procedure B11 11 Test report 12 Annex A (informative) Types of failure14 Bibliography 15 EN 1052-3:2002 + A1:200
16、7 (E) 3 Foreword to EN 1052-3:2002 This document EN 1052-3:2002 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 endorsemen
17、t, at the latest by January 2003, and conflicting national standards shall be withdrawn at the latest by January 2003. Annex A of this European Standard is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to imp
18、lement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to EN 1052-3:2002/A1:2007 This document (EN 1052-3:2002/A
19、1:2007) has been prepared by Technical Committee CEN/TC 125 “Masonry”, the secretariat of which is held by BSI. This Amendment to the European Standard EN 1052-3:2002 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by Sept
20、ember 2007, and conflicting national standards shall be withdrawn at the latest by September 2007. 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, Cyprus, Cze
21、ch Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. 1 Scope This European Standard specifies a metho
22、d for determining the in plane initial shear strength of horizontal bed joints in masonry using a specimen tested in shear. Guidance is given on the preparation of the specimens, the conditioning required before testing, the testing machine, the method of test, the method of calculation and the cont
23、ents of the test report. 2 Normative references This European Standard incorporates 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, subseque
24、nt amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 1052-3:2002 + A1:2007 (E) 4 EN 772-1, Methods
25、of test for masonry units Part 1: Determination of compressive strength EN 772-10, Methods of test for masonry units Part 10: Determination of moisture content of calcium silicate and autoclaved aerated concrete units EN 772-16, Methods of test for masonry units Part 16: Determination of dimensions
26、EN 998-2, Specification for mortar for masonry Part 2: Masonry mortar EN 1015-3, Methods of test for mortar for masonry Part 3: Determination of consistence of fresh mortars (by flow table) EN 1015-7, Methods of test for mortar for masonry Part 7: Determination of air content of fresh mortar EN 1015
27、-11, Methods of test for mortar for masonry Part 11: Determination of flexural and compressive strength of hardened mortar 3 Principle The initial shear strength of masonry is derived from the strength of small masonry specimens tested to destruction. The specimens are tested in shear under four-poi
28、nt load. Four different failure modes are considered to give valid results. Two procedures, A and B are included. Procedure A involves testing specimens at different precompressions and the initial shear strength is defined by a linear regression curve to zero prestress. Procedure B involves testing
29、 specimens at zero precompression and determining a characteristic initial shear strength from a simple or a statistical consideration of the results. 4 Terms, definitions and symbols 4.1 Terms and definitions For the purpose of this European Standard, the following terms and definitions apply. 4.1.
30、1 masonry assemblage of masonry units laid in a specified pattern and jointed together with mortar 4.1.2 shear strength of masonry strength of masonry subjected to shear forces 4.2 Symbols Aiis the cross-sectional area of a specimen parallel to the bed joints, in square millimetres (mm2) e distance
31、between centre lines of the mortar bed and the loading roller, in millimetres (mm)fvoiis the shear strength of an individual sample, in Newton per square millimetres (N/mm2) fpiis the precompressive stress of an individual sample, in Newton per square millimetres (N/mm2) fvois the mean initial shear
32、 strength, in Newton per square millimetres (N/mm2) EN 1052-3:2002 + A1:2007 (E) 5 fvkois the characteristic initial shear strength, in Newton per square millimetres (N/mm2) F is the representation of the force applied to the specimen, in Newton (N) Fi,maxis the maximum shear load, in Newton (N) Fpi
33、is the precompressive force, in Newton (N) h1 and h2are the heights of cut units, in millimetres (mm)hu is the height of the units according to EN 772-16, in millimetres (mm) lsis the length of specimen, in millimetres (mm) lu is the length of the units according to EN 772-16, in millimetres (mm) tb
34、j is the thickness of the bed joint, in millimetres in millimetres (mm) tsis the thickness of the steel loading plates, in millimetres (mm) is the angle of internal friction, in degrees k is the characteristic angle of internal friction, in degrees 5 Materials 5.1 Masonry units 5.1.1 Conditioning of
35、 the units The conditioning of masonry units shall be as specified: Record the method of conditioning the masonry units prior to laying. Measure the moisture content by mass of autoclaved aerated concrete and calcium silicate units in accordance with EN 772-10. Record the age of non-autoclaved concr
36、ete units at the time of testing the masonry specimens. 5.1.2 Testing Determine the compressive strength of a sample of masonry units, using the test method given in EN 772-1. For non autoclaved concrete units determine the compressive strength at the time of testing the masonry specimens. 5.2 Morta
37、r The mortar, its mixing procedure and its flow value shall conform with the requirements of EN 998-2, unless otherwise specified, and these shall be reported in the test report. Take representative samples of fresh mortar from the masons board to make mortar prism specimens, to determine the flow v
38、alue in accordance with EN 1015-3 and to determine the air content in accordance with EN 1015-7. Use the prism specimens to determine the mean compressive strength at the time of testing the masonry specimens in accordance with EN 1015-11. EN 1052-3:2002 + A1:2007 (E) 6 6 Apparatus The testing machi
39、nes used to apply the shear loads and precompression shall comply with the requirements given in Table 1. The testing machine to apply the shear loads shall have adequate capacity but the scale used shall be such that the ultimate load on the specimen exceeds one fifth of the full scale reading. The
40、 machine shall be provided with a load pacer or equivalent means to enable the load to be applied at the rate specified. 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 in
41、dicated force Maximum permissible error of zero force as percentage of maximum force of range 2,0 2,0 0,4 Apparatus capable of measuring the cross sectional area of the specimens to an accuracy of 1 %. 7 Preparation and curing of specimens 7.1 Preparation of masonry specimens Prepare Type I specimen
42、s according to Table 2 and Figure 1. If hu 200 mm, Type II specimens may be used. Where for practical purposes it is necessary to cut units, ensure that the faces of the unit to be mortared are representative of the unit as a whole. h2= (h1 tbj)/2 Type I Type II Key Possible saw cuts Figure 1 Dimens
43、ions of shear test specimen EN 1052-3:2002 + A1:2007 (E) 7 Table 2 Dimensions and type of shear test specimens Unit length Specimen type and dimensions lumm Type according to Figure 1 Dimensions mm 300 I ls= lu 300 I 300 300 II h1= 200 300 ls 350Build the specimens within 30 min after completion of
44、the conditioning of the units. Use mortar mixed not more than 1 h beforehand unless it is designed to be used over a more prolonged period. The bearing surfaces of the masonry units shall be wiped clean of any adherent dust. The lower unit shall be laid on a clean level surface. The next unit shall
45、be laid so that a final mortar joint thickness of 8 mm to 15 mm, representative of masonry with conventional mortar joints, or of 1 mm to 3 mm, representative of masonry with thin layer mortar joints, is attained. The masonry unit shall be checked for linear alignment and level using a set-square an
46、d spirit level. Excess mortar shall then be struck off with a trowel. In the case of Type I specimens according to Figure 1, the procedure for the second unit shall be repeated for the top unit. 7.2 Curing and conditioning of the specimens Immediately after building, pre-compress each specimen by an
47、 uniformly distributed mass to give a vertical stress between 2,0 103N/mm2and 5,0 103N/mm2. Then cure the specimens and maintain them undisturbed until testing. For other than lime based mortars, prevent the test specimens from drying out during the curing period by close covering with polyethylene
48、sheet, and maintain the specimens undisturbed until testing, unless otherwise specified. Test each specimen at an age of 28 d 1 d, unless otherwise specified for lime based mortars, and determine the compressive strength of the mortar at the same age following EN 1015-11. 8 Procedure 8.1 Placing the
49、 specimens in the testing machine Support the end units of each specimen in the test apparatus in accordance with Figure 2. For this, use pieces of steel at least 12 mm thick, with an appropriate capping if necessary, to ensure good contact. The diameter of the roller bearings shall be 12 mm with a length of at least the width of the unit. Apply the load through a ball hinge placed in the centre of the top central steel plate. EN 1052-3:2002 + A1:2007 (E) 8 12 mm ts 20 mm 15sle = Type I Type II Key 1 Saw cut 2 Roller, f
