1、DEUTSCHE NORM No part of this standard may be reproduced without the 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).May 2005DIN EN 772-2English price group 6 www.din.de www
2、.beuth.de08.05 9648369Document comprises 6 pages.Methods of test for masonry unitsPart 2: Determination of percentage area of voids in masonry units (by paper indentation)(includes Amendment A1:2005)English version of DIN EN 772-2:1998 + A1:2005Prfverfahren fr Mauersteine Teil 2: Bestimmung des proz
3、entualen Lochanteils in Mauersteinen (mittels Papiereindruck) (enthlt nderung A1:2005)A comma is used as the decimal marker.National forewordThis standard has been prepared by CEN/TC 125 Masonry (Secretariat: United Kingdom).The responsible German body involved in its preparation was the Normenaussc
4、huss Bauwesen (Building and Civil Engineering Standards Committee), Technical Committee 06.01.00 Mauerwerksbau.This European Standard is part of a series of standards specifying methods used to check compliance of masonry units with the requirements specied in the relevant product standard.Amendment
5、sThis standard differs from the October 1998 edition in that it has been revised in form and substance.Previous editionDIN EN 772-2: 1998-10.ICS 91.100.30 Supersedes October 1998 edition.!,cvh“English versionICS 91.100.30 Supersedes EN 772-2:1998.Management Centre: 36, rue de Stassart, B-1050 Brusse
6、lsEuropean Committee for StandardizationComit Europen de NormalisationEuropisches Komitee fr Normung 2005. CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national members.Ref. No. EN 772-2:1998 + A1:2005 EMethods of test for masonry unitsPart 2: Determination
7、of percentage area of voids in masonry units (by paper indentation)(includes Amendment A1:2005)Mthodes dessai des lments de maonnerie Partie 2: Dtermination du pourcentage de vides dans les l-ments de maonnerie (par empreinte sur papier) (amendement A1:2005 inclus)Prfverfahren fr Mauersteine Teil 2:
8、 Bestimmung des prozentualen Loch-anteils in Mauersteinen (mittels Papier-eindruck) (enthlt nderung A1:2005)This European Standard was approved by CEN on 1998-07-02 and Amendment A1 on 2004-12-29.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
9、 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 Management Centre or to any CEN member.The European Standards exist in three ofcial ver
10、sions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notied to the Management Centre has the same status as the ofcial versions.CEN members are the national standards bodies of Austria, Belgium, Cyprus
11、, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland, and the United Kingdom.EN 772-2August 1998+ A1February 2005Page
12、 2 EN 772-2:1998 + A1:2005ContentsPageForeword to EN 772-2:1998. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Foreword to EN 772-2:1998/A1:2005 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Scope . . . . . . . . . . . . . . . . . . . . . . . . .
13、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Symbols. . . . . .
14、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15、 . . . . . . . . . . 37 Preparation of specimens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 Expression of results. . . . . . . . . . . . . . . . . . . . .
16、 . . . . . . . . . . . . . . . . . . . . . 510 Test report. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Foreword to EN 772-2:1998This European Standard has been prepared by Technical Committee CEN/TC 125 Masonry, the Secretariat of which is held
17、 by BSI.This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, by February 1999 at the latest, and conicting national standards shall be withdrawn by September 2000 at the latest.In accordance with the CEN/CENELEC Intern
18、al Regulations, the national standards organizations of the follow-ing countries are bound to implement this European Standard:Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Lux-embourg, the Netherlands, Norway, Portugal, Spain, Sweden, Swit
19、zerland, and the United Kingdom.Foreword to EN 772-2:1998/A1:2005This amendment to EN 772-2:1998 has been prepared by Technical Committee CEN/TC 125 Masonry, the Secretariat of which is held by BSI.This amendment shall be given the status of a national standard, either by publication of an identical
20、 text or by endorsement, and conicting national standards withdrawn, by August 2005 at the latest.In accordance with the CEN/CENELEC Internal Regulations, the national standards organizations of the follow-ing countries are bound to implement this European Standard:Austria, Belgium, Cyprus, the Czec
21、h Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Slo-vakia, Slovenia, Spain, Sweden, Switzerland, and the United Kingdom.Page 3 EN 772-2:1998 + A1:20051 ScopeThis Europea
22、n Standard specifies a method of determining the percentage area of voids in masonry units. 2 Normative referencesThis European Standard incorporates by dated or undated reference, provision from other publications. These normative references are cited at the appropriate places in the text and the p
23、ublications 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 amendment or revision. For undated references, the latest edition of the publication referred to applies. EN 771-
24、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 aggregates) EN 771-4 Specification for masonry units P
25、art 4: Autoclaved aerated concrete masonry units EN 771-5 Specification for masonry units Part 5: Manufactured stone masonry units 3 PrincipleAfter preparation of the specimens thick pieces of paper are impressed on the test surfaces1of the masonry units and the indentation measured to give the perc
26、entage area of voids. 4 Symbols Avis the total cross sectional area of voids, (mm2)Auis the cross sectional area of masonry unit, (mm2)Mpvis the mass of paper cut to the shape of the void, (g) Mpuis the mass of paper cut to the shape of the masonry unit, (g) 5 MaterialsThick, stiff sheets of paper,
27、the dimensions of each piece of paper exceeding the dimensions of the masonry unit by at least 20 mm in both directions. 6 Apparatus6.1 A compression testing machine.1The test may be arranged so that the percentage area of voids in opposing faces of the masonry unit are tested simultaneously or face
28、s tested singly. Page 4 EN 772-2:1998 + A1:20056.2 A planimeter.6.3 A weighing instrument capable of weighing to an accuracy of 0,1 g. 7 Preparation of specimens7.1 SamplingThe method of sampling shall be in accordance with the relevant part of EN 771. The minimum number of specimens shall be six, b
29、ut a larger minimum number may be specified in the product specification, in which case that larger number shall be used. 7.2 Surface treatmentRemove any roughness on the test face(s) of the masonry unit. 8 Test procedure8.1 Obtaining the indentationsPlace one sheet of paper on the bottom platen of
30、a compression testing machine (6.1).Place the masonry unit on the paper, with the voids running vertically, and then, if required to test two faces simultaneously, place a second sheet of paper on the top face of the masonry unit. Apply a load of approximately 3 kN. Mark the outline on both sheets o
31、f paper of the indentations that have been made. 8.2 Measurement8.2.1 GeneralMeasure the areas of the cross section of the voids and the masonry unit in accordance with 8.2.2 or the weights of the corresponding areas of paper in accordance with 8.2.3.8.2.2 Measurement by geometryFor each sheet of pa
32、per determine the total cross sectional area of the voids Avand of the masonry unit Auand express them to the nearest 10 mm2using the planimeter (6.2).8.2.3 Measurement by weightFor each sheet of paper cut out the area representing the area of the masonry unit and weigh it to the nearest 0,1 g. Reco
33、rd the weight Mpu.From the sheet of paper representing the area of the masonry unit cut out the areas representing the voids and weigh these to the nearest 0,2 g. Record the weight Mpv.Page 5 EN 772-2:1998 + A1:20059 Expression of results Determine the percentage area of voids by geometry, AAvu100 (
34、1) or by weight, MMpvpu100 (2) for the paper applied to each bed face of the masonry unit. Determine the mean percentage area of voids, if required, to the nearest 1 %. 10 Test reportThe test report shall contain the following information: a) The number, title and date of issue of this European Stan
35、dard. b) the name of the organization that carried out the sampling and the method used ; c) the date of testing; d) the type, origin and designation of the masonry unit by reference to the relevant part of EN 771; e) The number of specimens in the sample. f) A reference to the method used (i.e. by geometry or by weight). g) The percentage area of voids of each specimen and the mean value, if required, to the nearest 1 %. h) Remarks, if any.
