BS EN 772-9-1998 Methods of test for masonry units - Determination of volume and percentage of voids and net volume of clay and calcium silicate masonry units by sand filling《圬工砌块的.pdf

1、BRITISH STANDARD BS EN 772-9:1998 Incorporating Amendment No. 1 Methods of test for masonry units Part 9: Determination of volume and percentage of voids and net volume of clay and calcium silicate masonry units by sand filling The European Standard EN 772-9:1998, with the incorporation of amendment

2、 A1:2005, has the status of a British Standard ICS 91.100.20 BS EN 772-9:1998 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 15 December 1998 BSI 16 December 2005 ISBN 0 580 30699 2 National foreword This British Standard is the official Eng

3、lish language version of EN 772-9:1998, including amendment A1:2005. The start and finish of text introduced or altered by CEN 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 in

4、dicated by !“. The UK participation in its preparation was entrusted by Technical Committee B/519, Masonry and associated testing, to Subcommitttee 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 secr

5、etary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catal

6、ogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand t

7、he text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front c

8、over, an inside front cover, the EN title page, pages 2 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 15681 16 December 2005 Title revised, also

9、see national forewordCEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu rNormung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. R

10、ef. No. EN 772-9:1998 + A1:2005 E EUROPEAN STANDARD EN 772-9 NORME EUROPE ENNE EUROPA ISCHE NORM August 1998 ICS 91.100.20 Descriptors: construction, masonry, units, calcium silicate, tests, determination, volume of voids, percentage of voids, sand filling English version Methods of test for masonry

11、 units Part 9:Determination of volume and percentage of voids and net volume of calcium silicate masonry units by sand filling Me thodes dessai des e le ments de maonnerie Partie 9:De termination du volume et du pourcentage des vides et du volume net absolu des e le ments de maonnerie en silico-calc

12、aire par remplissage de sable Pru fverfahren fu r Mauersteine Teil 9:Bestimmung des Loch- und Nettovolumens sowie des prozentualen Lochanteils von Kalksandsteinen mittels Sandfu llung This European Standard was approved by CEN on 2 July 1998; amendment CEN members are bound to comply with the CEN/CE

13、NELEC 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

14、 CEN member. 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. (i

15、nclut lamendement A1:2005) (enthlt nderung A1:2005) (includes amendment A1:2005) +A1 February 2005 A1:2005 was approved by CEN on 29 December 2004. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,

16、Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.Page2 EN 772-9:1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 125,Masonry, the Secretariat of

17、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 latest by February 1999, and conflicting national standards shall be withdrawn at the latest by September 2000. According to the CEN/CEN

18、ELEC Internal Regulations, the national standards organizations of the following 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, Sw

19、itzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Principle 3 4 Symbols 3 5 Materials 3 6 Apparatus 3 7 Preparationof specimens 3 8 Test procedure 3 9 Calculation and expression of results 3 10 Evaluation of results 4 11 Test report 4 Foreword to amendme

20、nt A1This document (EN 772-9:1998/A1:2005) 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 772-9:1998 shall be given the status of a national standard, either by publication of an identical text or by e

21、ndorsement, at the latest by August 2005, and conflicting national standards shall be withdrawn at the latest by August 2005.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belg

22、ium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Page 3 EN 772-9:1998 1 Scope This Europea

23、n Standard specifies a method of determining the volume and percentage of voids and net volume of clay and calcium silicate masonry units containing cells, frogs and holes. 2 Normative references This European Standard incorporates by dated and undated reference, provisions from other publications.

24、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 amendment or revision. For un

25、dated reference the latest edition of the publication referred to applies. 3 Principle The principle of this test is to measure the volume of voids in a masonry unit by measuring the volume of sand required to fill them. 4 Symbols V n,u is the net volume of each unit (10 4 mm 3 ). V s,u is the volum

26、e of voids (10 4 mm 3 ). V g,u is the gross volume of each unit (10 4 mm 3 ). 5 Materials Dry graded sand with a grain size above 0,5mm and passing a 1 mm test sieve (6.4). 6 Apparatus 6.1 Thin sheet of foam rubber , or other resilient material. 6.2 Rigid plate, slightly larger than the unit. 6.3 Gl

27、ass measuring cylinder , graduated in ml. 6.4 Two test sieves, one with 0,5mm apertures and one with 1 mm apertures. 7 Preparation of specimens 7.1 Sampling The method of sampling shall be in accordance withnumber of specimens shall be six, but a larger minimum number may be specified in the product

28、 specification, in which case that larger number shall be used. 7.2 Surface treatment Remove any superfluous material adhering to the unit as a result of the manufacturing process before commencing the test. 8 Test procedure 8.1 Volume of voids Place the air-dry unit on the thin sheet of foam rubber

29、 (6.1) or other resilient material with the open end of voids uppermost. When the unit has voids or recesses in the ends that need to be measured, close the ends with the rigid plate (6.2). 8.2 Sand filling procedure Fill the glass measuring cylinder (6.3) accurately with the dry sand and record the

30、 volume. Fill the voids with the sand by pouring from the cylinder, refilling it if required. Keep the cylinder lip as close as possible to the top of the void, pour steadily and then strike off level. Return to the cylinder any sand struck off and note the total volume of sand (V s,u ) used to the

31、nearest 10 4 mm 3 . 9 Calculation and expression of results Calculate the gross volume of the unit (V g,u )b y multiplying the length (l u ) by the height (h u ) and the width (w u ) of the unit measured in accordance with prEN 772-16. V g,u =l u 3 w u 3 h u (1) Calculate the net volume (V n,u ) of

32、each unit to the nearest 10 4 mm 3 , if required. V n,u =V g,u 2 V s,u (2) Calculate the % of voids to the nearest 1 % as (3) 3100 V s,u V g,u ! “! 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

33、 771-3, Specification for masonry units Part 3: Aggregate concrete masonry units (dense and lightweight aggregates). EN 771-4, Specification for masonry units Part 4: Autoclaved aerated concrete masonry units prEN 772-16, Methods of test for masonry units Part 16: Determination of dimensions “ !the

34、relevant part of EN 771 “. The minimum Page 4 EN 772-9:1998 10 Evaluation of results Calculate the mean value of the percentage of voids to the nearest 1 %. 11 Test report The test report shall contain the following information: a) the number, title and date of issue of this European Standard; b) a

35、description of the masonry unit to the relevantc) the method of sampling and by which organization; d) the date of delivery of the specimens; e) the date of testing; f) the number of specimens in sample; g) the volume of voids (V s,u ) in each unit to the nearest 10 4 mm 3 ; h) the mean volume of vo

36、ids to the nearest 10 4 mm 3 ; i) the net volume of each unit (V n,u ) to the nearest 10 4 mm 3 , if required; j) the individual and mean values of percentage of voids to the nearest 1 %; k) remarks, if any. !Part of EN 771 “; blankBS EN 772-9:1998 BSI 389 Chiswick High Road London W4 4AL BSI Britis

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