1、STDWBSI BS EN 772-13-ENGL 2000 E 1b24bb9 0867036 219 BS EN 772- 132000 BRITISH STANDARD Methods of test for masonry units - Part 13: Determination of net and gross dry density of masonry units (except for natural stone) The European Standard EN 772-132000 has the stahis of a Britjsh Standard ICs 91.
2、100.15 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMZTTED BY COPYRIGHT LAW STD-BSI BS EN 772-L-ENGL 2000 lib24bb9 08b7037 i155 direction of the Sector Amd. No. Committee for Building and Civil Engineering, was published under the authority of the standards Committee and comes into effect on 15 Au
3、gust Zoo0 O BSI 082 BS EN 772-13:2000 Date Comments National foreword This British Standard is the official English language version of EN 772132000, which is included in a package of new European Stanhds being prepared by CENITC 125 relating to masonry units made from clay, calcium silicate, aggreg
4、ate concrete, and manufactured stone. Although the English language versions of these European Standards will be adopted as British Standards as they become available, the existing British Standards for masonry units will be retained, but only until such time that the complete package of European St
5、andards becomes available. Any residue(s) from British Standasds affected by the package which need to be retained, will be drawn together to form a new British Standard. The originai group of British Standards will then be withdrawn and this wi be notified in The UK participation in its preparation
6、 was entrusted by Technical Committee M19, Masonry and associated testing, to Subcommittee B/519/1, Masonry units, which has the responsibility to: update Standanls. - aid enquirers to understand the te* - present to the responsible European committee any enquiries on the interpretation, or proposal
7、s for change, and keep the UK interests informed; - monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement inte
8、niational or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI standards Electronic Catalogue. A British Standard does not purport to inc
9、lude ail the necessary provisions of a contmct. Users of British Stan- are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN ti
10、tle page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright notice dispayed in this document indicates when the document was last issued. ISBN O 580 92725 6 STD-BSI BS EN 772-13-ENGL 2000 I Lb2YbbS 0867038 O91 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 772-13 June 2000
11、 ICs 91 .I 00.20 English version Methods of test for masonry units - Part 13: Determination of net and gross dry density of masonry units (except for natural stone) Mthodes dessai des lments de mapnnerie - Partie 13: Dtermination de la masse volumique absolue sche et de la masse volumique apparente
12、sche des lments de maonnerie (except8 les pierres naturelles) Prfverfahren fr Mauersteine - Teil 13: Bestimmung der Netto- und Brutto- Trockenrohdichte von Mauersteinen (auer Natursteinen) This European Standard was approved by CEN on 3 June 1999. CEN members are bound to comply with the CENICENELEC
13、 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 sich national standards may be obtained on application to the Central Secretariat or to any CEN
14、member. This European Standard exists in three official versions (English, French, German). A version in any other language made by traislation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as he official versions. CEN memb
15、ers are the national standards bodies of Austria, 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 NORMALISATI
16、ON EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels Q 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 772-13:2000 E - STD-BSI BS EN 772-13-ENGL 2000 M Lb24669 0867039 T26 M Page 2 EN 772-
17、 13 2000 Contents Page Foreword 3 1 Scope . 4 2 Normative references . 4 3 Principle 4 4 Definitions and symbols . 4 5 Apparatus 6 6 Sampling 6 7 Procedure . 6 8 Test report ._ . 8 8 BSI 08-2000 STD*BSI BS EN 772-13-ENGL 2000 E lb24669 OBb7040 74T Page 3 EN 772- 13 12000 Foreword This European Stand
18、ard has been prepared by Technical Committee CENEC 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, at the latest by December 2000, and conflicting national st
19、andards shall be withdrawn at the latest by December 2000. According to the CENKENELEC 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, Ice
20、land, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. O BSI 08-2000 STDmBSI BS EN 772-13-ENGL 2000 I II624659 086704L 686 Page 4 EN 772- 13 :2000 1 Scope This European Standard specifies a method of determining the net and gross dry densi
21、ty of masonry units (except for natural stone masonry units). 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 herea
22、fter. 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. prEN 771-1 Specification for masonry
23、 units - Part 1: Clay masonry units. EN 771-2 Specification for masonry units - Part 2: Calcium silicate masonry units. prEN 77 1-3 Specification for masonry units - Part 3: Aggregate concrete masonry units (dense and lightweight aggregates). EN 771-4 Specification for masonry units - Part 4: Autocl
24、aved aerated concrete masonry units. prEN 771-5 prEN 772-3 prEN 772-9 EN 772-16 Specification for masonry units - Part 5: Manufactured stone masonry units. Methods of test for masonry units - Part 3: Determination of net volume and percentage of voids of clay masonry units, by hydrostatic weighing.
25、Methods of test for masonry units - Part 9: Determination of volume and percentage of voids and net volume of calcium silicate masonry units, by sand filling. Methods of test for masonry units - Part 16: Determination of dimensions. 3 Principle After drying to constant mass and calculating the net a
26、nd gross volume, the net and gross dry density of the masonry units are calculated. 4 Definitions and symbols 4.1 Definitions 4.1.1 gross dry density - the mass per unit gross volume after drying to constant mass 8 BSI 08-2000 STD-BSI BS EN 772-13-ENGL 2000 Lb24bb9 08b7042 512 = Page 5 EN 772-13:200
27、0 4.1.2 gross volume - the volume of the unit derived fiom the length, width and height with a deduction of the volume of perforations, voids, recesses or indentations intended to be filled with mortar 4.1.3 net dry density - the mass per unit net volume after drying to constant mass 4.1.4 net volum
28、e - the gross volume of the unit less the volume of any perforations or voids not intended to be filled with mortar 4.2 Symbols EU is the unit length, (mm) WU is the unit width, (mm) hU is the unit height, (mm) m0.u is the mass of a whole unit specimen prior to drying, (g) mo,p,tot is the combined m
29、ass of a group of three representative portions of a whole unit specimen prior to drying, (g) md, is the mass of one individual representative portion of the three portions of a whole unit specimen after drying to constant mass, (g) mdlY,P,tot is the combined mass of a group of three representative
30、portions of a whole unit specimen after drying to constant mass, (g) mdlY,u is the mass of a whole unit specimen (or corresponding whole unit where representative portions have been taken) after drying to constant mass, (g) WP is the moisture content of a group of three representative portions of a
31、whole unit specimen V“,U is the net volume of unit, (nun3) Vi,. is the gross volume of unit, (mm3) ViP is the gross volume ofparts ofunit, (mm3) P,u is the net dry density, (kg/m3) pn.P is the net dry density of parts of unit, (kg/m3) Pi4 is the gross dry density, (kg/m3) O BSI 08-2000 STDeBSI BS EN
32、 772-13-ENGL 2000 Lb24bb9 0867043 459 Page 6 EN 772- 13 :2000 5 Apparatus 5.1 Ventilated oven capable of maintaining a temperature of 105 calcium silicate and autoclaved aerated concrete units. C f 5 O C for use with clay, 5.2 Ventilated oven capable of maintaining a temperature of 70 O C f 5 O C fo
33、r use with aggregate concrete and manufactured stone units. 5.3 Weighing instrument capable of weighing the whole unit or portions of it to an accuracy of O, 1 % of their mass. 6 Sampling The method of sampling shall be in accordance with the relevant part of EN 771. The minimum number of specimens
34、shall be six, but a larger minimum number may be specified in the product specification, in which case that larger number shall be used. 7 Procedure 7.1 Determination of dry mass 7.1.1 Whole unit specimens Dry the test specimens to constant mass m+,u in a ventilated oven at a temperature of 70 O C f
35、 5 O C (5.2) for aggregate concrete and manufactured stone masonry units or 105 O C f 5 O C (5.1) for clay, calcium silicate and autoclaved aerated concrete masonry units. Constant mass is reached, if during the drying process in two subsequent weighings with a 24 h interval, the loss in mass betwee
36、n the two determinations is not more than 0,2 % of the total mass. Record the mass h,. 7.1.2 Portions of whole unit specimens Where representative portions are used, first weigh each whole unit specimen and record the mass (mo,“). Then obtain three representative solid portions, i.e. containing no e
37、nclosed or exposed formed voids, of at least 100 g fi-om each whole unit specimen and weigh each group of three together. Record the mass of each group (mo,p,bt). Dry each group of three portions to constant mass following the procedure of 7.1.1 above. Record the mass of each group (mw,p,tot). Calcu
38、late the moisture content of each group of three portions using equation (1): O BSI 08-2000 STD-BSI BS EN 772-13-ENGL 2000 Lb24669 0867044 395 W Page 7 EN 772-13:2000 Calculate the corresponding dry mass of the whole unit (nd,) using equation (2): m0,u Wry,u = - l+wp 7.2 Net dry density 7.2.1 Whole
39、units Determine the net volume using one of the following methods as appropriate a) For clay masonry units, by weighing in water as indicated in EN 772-3. b) For calcium silicate masonry units, by using sand filling as indicated in EN 772-9. c) For manufactured stone and solid aggregate concrete mas
40、onry units, by subtracting the volume of all recesses or indentations, determined using a suitable measuring device, fiom the volume (Eength x width x height ) determined in accordance with EN 772-16. Express the net volume Vn,” to the nearest l O4 mm3. d) For aggregate concrete masonry units with f
41、ormed voids, by the method of c) above, but in addition subtracting the volume of all voids. Express the net volume Vn,u to the nearest io4 mm3. Determine the net dry density of the masonry unit n,J using equation (3): Calculate the net dry density of each whole unit specimen to the nearest 5 kg/m3
42、for densities up to 1 O00 kg/m3 and to the nearest 10 kg/m3 for densities over 1 O00 kgim3. Calculate the mean of the net dry densities of the specimens. 7.2.2 Representative portions of whole unit specimens Determine the net dry density of the parts as follows: - determine the dry mass of each port
43、ion of the whole unit specimen mbs, by drying according to 7.1.2; - determine the volume of the parts VgP by measuring length, width and height to the nearest 1 mm; - calculate the net dry density to the nearest 5 kg/m3 using equation (4): O BSI 08-2000 STD-BSI BS EN 772-13-ENGL 2000 m lbZ4bb9 08b70
44、45 221 9 Page 8 EN 772-13:2000 Define the net dry density of each whole unit specimen (fi-om which the portions were obtained) as the mean value of the net dry density of the three representative portions. Express the net dry density of the whole unit specimens to the nearest 5 kg/m3 for densities u
45、p to 1 O00 kg/m3 and to the nearest 10 kg/m3 for densities over 1 O00 kg/m3. Calculate the mean of the net dry densities of the whole unit specimens. 7.3 Gross dry density Calculate the gross volume V, of the unit fiom the unit dimensions length, width and height (see EN 772-16) with a subtraction o
46、f the volume of perforations, voids, recesses or indentations intended to be filled with mortar determined by measurement by any suitable method with the same accuracy of measurement as incorporated in EN 772-16. To find the gross dry density of the unit (pg,J see equation (5), divide the dry mass (
47、mdiy,) obtained according to 7.1 by the gross volume (VJ of the unit: Express the gross dry density of each whole unit specimen to the nearest 5 kg/m3 for densities up to 1 000 kg/m3 and to the nearest 10 kgim3 for densities over 1 O00 kg/m3. Calculate the mean of the gross dry densities of the spec
48、imens. 8 Test report The test report shall contain the following information: a) the number, title and date of issue of this European Standard; b) a description of the masonry unit to the relevant part of EN 771; c) the method of sampling and by which organization; d) date of receipt of the specimen
49、s by the test laboratory; e) the date of testing the specimens; f) the number of specimens in sample and whether these are whole units or representative portions thereof; g) the individual and mean values of net dry density; h) the individual and mean values of gross dry density; i) remarks, if any. Q BSI 08-2000 BS EN 772-13:2000 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on st
