1、 STD.BS1 BS EN LOL5-7-ENGL 1999 Lb24bb 0743b52 532 BRITISH STANDARD Methods of test for mortar for masonry - Part 7: Determination of air content of fresh mortar The European Standard EN 10157 1998 has the status of a British Standard ICs 91.100.10 BS EN 1015-71999 NO COPYING WITHOUT BSI PERMISSION
2、EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 1015-7:1999 direction of the Sector AmdNo. Cinnmiee for Buiiding and Civil nigineering, was published under the authority of the Standards Commiaee and comes into effect on 15 February 1999 Q BSI 02-1999 National foreword Dak Text affected This Brish Standa
3、rd is the English language version of EN 101571998. It is included in a package of standards declared by CENm 125 that will parhly supemede BS 4551-1, Mews of testing mmtars, screeds and p! - present to the responsible European committee any enquiries on the - monitor related intedonai and European
4、developments and promulgate inteqm$ation, or proposals for change, and keep the UK interests informed; them in the IK A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European
5、 publicaiions referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Internationai Stanards Correspondence Index“, or by using the “Find“ faciiity of the BSI Standards Electronic Catalogue. A British standard does not purport to include all the necessary
6、 provisions of a contract Users of British Standards are responsible for their comt 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 title page, pages 2 to
7、5 and a back cover. ISBN O 680 30749 2 EUROPEAN mmm Nom EUROPENNE EUROP- NORM EN 1015-7 October 1998 ICs 91.100.10 Descriptors: air content, pressure method, alcohol methd English version Methods of test for mortar for masomy - Part 7: Delmnhation of air content of fresh mortar Mhodes dessai des mor
8、tiem pour maqonnerie - Partie 7 Dtermination de la teneur en air du mortier his hml prufverfahren nIr MM fur Mauerwerk- Teil 7 Ikstimmung des Luftgehalts von This European Standard was approved by CEN on 4 September 1998. CEN members are bound to comply with the CENKENELEC Intenial Regulations which
9、 stipulate the conditions for giving this European Standard the status of a national standaxd without any alteraon. Upto-date lists and bibhographid references conceniing such national standarch may be obtained on application to the Central Secretariat or to any CEN member. This European Standard ex
10、ists in three officiai versions (English, Rench, Gem). A version in any other language made by translation under the responsibility of a CEN member into its own ianguage and noified to the Central Secretariat has the same status as the officiai versions. CEN members are the national standards bodies
11、 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 Comitk Europen de Normalisation Europisches Komitee fr Normung Ce
12、ntral Secretariat: rue de Stassart 36, B-1060 Brussels O 1998 CEN AU rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 101571998 E Page 2 EN 1015-7:1998 Foreword This European standard has been prepared by Technical Committee CENRC 125, Maso
13、q, 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 identicai text or by endorsement, at the latest by April 1998, and conflicting nationa3 standards shall be withdrawn at the latest by September 2000. This
14、European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free hade Association and includes the performance requirements referred to in the Eurocode for masonry structures. According to the CENKENELEC Internai Regulations, the national standards or
15、ganizations of the foilowing countries are bound to implement this European Standad Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, I-, Luxembourg, Netherianch, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Foreword 1 Sco
16、pe 2 Nonnative references 3 principle 4 Symbols 5 Apparatus 6 Sampling, preparation and storage of test samples 7 Method A - Pressure method 8 Metho B - Alcohol method 9 Testreport Annex A (nonnative) Calibration of the test WP- page 2 3 3 3 3 3 5 O BSI 02-1999 STD-BSI BS EN LOL5-7-ENGL 1777 m Lb24b
17、bS 074365b LB8 m 1 Scope This European Standard species two methods for determining the air content of fresh mortars including those containing mineral binders and both dense and lightweight aggregates. Method A “The pressure method“ and Method B “The alcohol method“. For air content less than 20 %,
18、 method A is applicable. For air content of 20 % or more, method B is applicable. 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 publicati
19、ons 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. prEN 9981, Speci
20、fkation for mortar for masonry - Part 1: Iiknwy an plastering mortar wih inorganic binding agents. prEN 9982, Specification for mdar for masonry - Part 2: Masonry mortar. EN 1015-2, Methods of test for mortar for masonry - Part 2: Bulk sampling of mortars and prepamtion of test mortars. prEN 10153,
21、Methods of test for mortar for masonry - Part 3: Determination of conslst-wce of fresh mortar ym table). 3 Principle A volume of mortar is placed into a specified measuring vessel. Water is introduced on top of the mortar surface, and by means of applied initial volume of mortar (mi); final volume o
22、f mortar plus alcohol (mi). 5 Apparatus 6.1 Apparatus for Method A - Pressure method 6.1.1 Sample container and cow assemblg comprising a metal bowl (sample container) with a capacity of approximately 1 litre, fitted with a metal cover assembly to whch is attached a sealed air chamber (pressure cham
23、ber). A pressure gauge for measurement of the applied air pressure (see Figure Al) is connected to it. Page 3 EN 1015-71998 6.1.2 Tamper, consisting of a rigid, non-absorptive rod of circular crosssection, approximately 40 mm in diameter and approximately 200 mm long. The tamping face is flat and at
24、 right angles to the length of the tamper. The mass of the tamper is 0,250 kg f 0,015 kg. 6.1.3 Trowel. 6.1.4 P NOTE This is the sample taken from the bulk supply that is to be used for all of the tests in EN 1015. c) the method used for taking the buk test sample (if known) and the name of the orga
25、nization that took it; d) the type, origin and desigmtion of the mortar by reference to the relevant Part of prEN 998; e) the date and time of testing; f) preparation (mixjng, casting) and storage (curing) conditions; g) the date and time of preparing test samples for test (i.e. date and time of any
26、 mixing, casting, moulding, or demoulding procedure, if appropde); h) the flow value of the test mortar determined in accordance with prEN 10153; i) age of mortar when tested; j) test method used (Method A - Pressure method or Method B - Alcohol method); k) test dts (individual values and mean value
27、 of air content); 1) remarks, if any This information is contained in the certificate of sampling (see EN 10152). O BSI 02-1999 STD.BSI BS EN LOL5-7-ENGL 1777 lb24bb7 0743b58 T50 Page 5 EN 1015-E1998 Key: 3 Valve B 6 Pressure gauge 9 Clamping device Annex A (normative) Calibration of the pressure te
28、st apparatus A calibration curve sha be established between air contents of O % and 25 % in increments of 5 96 Each value shall be calculated from the mean value of three measurements according to the following procedure. Fll the sample container with boiled water, at 20 “C f 2 OC. Fix the extension
29、 tube to the corresponding valve A (see Fgure Al). Fit the cover and close the air Valve between the air chamber and the sample container. Fill the chamber with water through valve A, keeping Valve B open, until ali air is expelled. Then close valves A and B. Connect the calibrating vessel to valve
30、k Pump air into the air chamber until the pressure reaches an initial prescribed level. Then open the air valve to force just a sufficient quantity of water to expel from the sample container and ii the caibration vessel fuil or to predetermined lines marked on the vessel (10 ml water corresponds to
31、 1 96 air content), using valve A to control the flow. 1 Extension tubing for calibration checks 2 Valve A 4 pump 5 Main air valve 7 Air bleeder valve 8 Airchamber 10 Metal bowl Close valve A and remove the calibration vessel. Release the air from the apparatus through valve B and then open valve A
32、to drain the extension tube back into the sample container. At this point of the procedure the sample container contains a volume of air corresponding to the predetermined volume of water in the calibration vessel. Pump air into the air chamber until the pressure reaches the initial prescribed level
33、. Close vaives A and B and then open the valve between the air chamber and the sample container. When equilibrium is reached the reading on the pressure gauge should correspond to the percentage of air determined to be in the sample container. if two or more determinations show the same variation fr
34、om the correct air content, as determined by the volume of water in the calibration vessel, reset the dial hand to the correct air content and repeat the test until the gauge re- corresponds to the dibraiion air content within 0,l Oh O BSI 02-1999 BS EN 1015-7: 1999 BSI 389 Chiswick High Road London
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