BS EN ISO 20182-2008 Refractory testpiece preparation - Gunning refractory panels by the pneumatic-nozzle mixing type guns《耐火试样的制备 用气压调节混合型枪喷涂耐火板》.pdf

1、BS EN ISO20182:2008ICS 81.080NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRefractory test-piece preparation Gunning refractorypanels by thepneumatic-nozzlemixing type guns (ISO20182:2008)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/12/2009 01:39,

2、 Uncontrolled Copy, (c) BSIThis British Standardwas published underthe authority of theStandards Policy andStrategy Committee on 30September 2009 BSI 2009ISBN 978 0 580 57348 4Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 20182:2008National forewordThis British Standard is the

3、 UK implementation of EN ISO 20182:2008.The UK participation in its preparation was entrusted to TechnicalCommittee RPI/1, Refractory products and materials.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include a

4、ll the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/12/2009 01:39, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPE

5、NNEEUROPISCHE NORMEN ISO 20182January 2008ICS 81.080English VersionRefractory test-piece preparation - Gunning refractory panels bythe pneumatic-nozzle mixing type guns (ISO 20182:2008)Prparation dprouvettes rfractaires - Panneauxrfractaires pour gunitage au pistolet mlangeurpneumatique (ISO 20182:2

6、008)Probenvorbereitung feuerfester Erzeugnisse -Probenvorbereitung feuerfester Spritzmassen mittelspneumatischer Spritzmaschinen (ISO 20182:2008)This European Standard was approved by CEN on 12 January 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the

7、 conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in t

8、hree official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of A

9、ustria, Belgium, Bulgaria, Cyprus, Czech 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.EUROPEAN COMM

10、ITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 20182:2008: ELicensed Copy: Wang Bin

11、, ISO/EXCHANGE CHINA STANDARDS, 21/12/2009 01:39, Uncontrolled Copy, (c) BSIBS EN ISO 20182:2008EN ISO 20182:2008 (E) 3 Foreword This document (EN ISO 20182:2008) has been prepared by Technical Committee ISO/TC 33 “Refractories“ in collaboration with Technical Committee CEN/TC 187 “Refractory produc

12、ts and materials“, 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 July 2008, and conflicting national standards shall be withdrawn at the latest by July 2

13、008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organiz

14、ations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roma

15、nia, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 20182:2008 has been approved by CEN as a EN ISO 20182:2008 without any modification. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/12/2009 01:39, Uncontrolled Copy, (c) BSIBS EN

16、 ISO 20182:2008ISO 20182:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv 1 Scope 1 2 Normative references 1 3 Terms and definitions .1 4 Principle2 5 Precision.2 6 Apparatus .2 7 Sampling.3 8 Procedure .3 9 Test report 5 Annex A (informative) Determination of total water content an

17、d rebound .6 Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/12/2009 01:39, Uncontrolled Copy, (c) BSIBS EN ISO 20182:2008ISO 20182:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodie

18、s (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations,

19、 governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO

20、/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the m

21、ember bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 20182 was prepared by Technical Committee ISO/TC 33, Refractories in

22、 collaboration with Technical Committee CEN/TC 187, Rerfractory products and materials. This second edition cancels and replaces the first edition (ISO 20182:2005), which has been technically revised as follows: in 6.5, two acceptable support plates are now specified; in Clause 8, pH determination h

23、as been added in place of water hardness testing and predamping percentages are now given for both dense and insulating castables; in Clause 9 test report item c), the water pH, if determined, replaces the water hardness; in Clause 9 test report item d), by agreement between the interested parties,

24、the total water content and rebound are measured and recorded. Annex A has been added, giving procedures for the determination of the total water content and rebound. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/12/2009 01:39, Uncontrolled Copy, (c) BSIBS EN ISO 20182:2008INTERNATIONAL

25、STANDARD ISO 20182:2008(E) ISO 2008 All rights reserved 1Refractory test-piece preparation Gunning refractory panels by the pneumatic-nozzle mixing type guns WARNING This International Standard may involve the use of hazardous materials, operations and equipment. It does not attempt to address the s

26、afety problems associated with its use. It is the responsibility of the user of this International Standard to establish appropriate safety and health practices, and to determine the applicability of regulatory limitations prior to use. 1 Scope This International Standard describes the procedure for

27、 the preparation of test panels from refractory materials by gunning through pneumatic-nozzle mixing type guns at ambient temperatures. NOTE The values obtained from test pieces cut from the panel prepared using this method might not correspond with those obtained from test pieces of the same materi

28、al prepared at a gunning installation site. This International Standard does not apply to plastic gunning mixes, and might not apply to those mixes that contain aggregates that are susceptible to hydration. It also does not apply to shotcrete type mixes. 2 Normative references The following referenc

29、ed documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 836, Refractories Vocabulary ISO 8656-1, Refractory products Sampli

30、ng of raw materials and unshaped products Part 1: Sampling scheme 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 836 and the following apply. 3.1 gun assembly essentially comprising a chamber into which the refractory is added, together with a mecha

31、nism that controls the flow of the material through the unit NOTE Depending on the type used, the gun may be open at the top, or a closed pressurized unit may be used. 3.2 rebound material material that fails to adhere to the surface when being sprayed, and ricochets out of the immediate area Licens

32、ed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/12/2009 01:39, Uncontrolled Copy, (c) BSIBS EN ISO 20182:2008ISO 20182:2008(E) 2 ISO 2008 All rights reserved4 Principle Refractory material is conveyed pneumatically in either a dry or predampened form to the test site, using equipment of the nozz

33、le mixing type. Then water is introduced to the refractory mix at the nozzle and the mixture is projected onto a support plate (see 6.5). 5 Precision Differences between various types of equipment and in operator techniques may result in variations in the physical properties of the gunned specimens.

34、 For referee testing, it is desirable that the same operator should use the same equipment to produce test specimens. 6 Apparatus 6.1 Gun, of the pneumatic-nozzle mixing type. 6.2 Air compressor, capable of supplying a steady airflow at the required pressure and volume. 6.3 Mixer, for use when preda

35、mping is carried out. The mixer shall be capable of producing a homogeneous mixture of the material to be tested. 6.4 Hose/nozzle assembly, comprising a reinforced pneumatic hose and a nozzle assembly suitable for the material being gunned. 6.5 Gunned-material support plate, flat, capable of produci

36、ng a panel having minimum usable dimensions of 280 mm 280 mm 100 mm thickness that is suitable for the tests intended to be carried out, after allowance for any material to be cut off as described in Clause 8. The preferred support plate has ledges at both sides and the top edge. An example of the p

37、referred support plate is given in Figure 1a). An alternative support plate may be used, 300 mm to 500 mm in length, and having a bottom support edge 100 mm in width and of the same overall length as the support plate. An example of the alternative support plate is given in Figure 1b). The support p

38、late may be made of wood or steel and shall not flex during use. The support plate may be larger than the minimum panel size, to allow the edges to be removed from the gunned panel, for example, to remove trapped rebound material at the bottom, and other edge effects. Interested parties shall agree

39、which type of panel is used. The test report shall state the dimensions of the gunned-material support plate and panel produced, and the type of panel used. 6.6 Air pressure gauge, capable of measuring pressures up to 690 kPa, plus or minus 5 % at all pressures. 6.7 Water-measuring device, for use i

40、f predamping is carried out, capable of measuring the water quantity to the nearest 5 %. 6.8 Water-pressure gauge, capable of measuring pressures up to at least 50 kPa greater than the pressure in the supply lines being used and within plus or minus 5 % at all pressures. 6.9 Miscellaneous tools, inc

41、luding a trowel and a shovel. 6.10 Thermometer, capable of being read to the nearest 1 C. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 21/12/2009 01:39, Uncontrolled Copy, (c) BSIBS EN ISO 20182:2008ISO 20182:2008(E) ISO 2008 All rights reserved 3Dimensions in millimetres a) Preferred gunn

42、ed-material support plate b) Alternative gunned-material support plate Figure 1 Examples of gunned-material support plates 7 Sampling Take the sample for preparation of a test panel in accordance with established sampling principles, such as those given in ISO 8656-1. The additional volume of materi

43、al required for sample preparation will depend on the amount left in the apparatus after the gunning operation, the amount of rebound material and the amount required to stabilize the gun. The mass of material required will depend on the total volume and the bulk density of the material. Only full b

44、ags of the material to be tested shall be selected and their entire contents shall be used. 8 Procedure Using Table 1 as a guide, choose the hose diameter appropriate to the particular refractory mix being gunned. Table 1 Feed systems Maximum aggregate size in mix mm Internal diameter of hose mm 8 5

45、 the largest aggregate sizes The nozzle and the gun are usually held at the same elevation. If this is not the case, record the difference to the nearest metre. The water pressure should be greater than 150 kPa above the gunning pressure at the nozzle, possibly requiring the use of a water pump. The

46、 watering and nozzle extension will be different for dense and lightweight materials. Determine the pH of the water used for predampening and gunning using litmus paper or a pH meter. If measured, record the pH and method used in the test report (Clause 9). Licensed Copy: Wang Bin, ISO/EXCHANGE CHIN

47、A STANDARDS, 21/12/2009 01:39, Uncontrolled Copy, (c) BSIBS EN ISO 20182:2008ISO 20182:2008(E) 4 ISO 2008 All rights reservedRecord the ambient temperature and the temperature of the refractory material to the nearest 1 C. Predampen the material in the mixer with the amount of water recommended by t

48、he manufacturer, ensuring that the material is used within 20 min of predamping. If there is no recommendation made by the manufacturer then, if necessary, predampen the material in the range 2 % to 5 % by mass for dense castables, and 5 % to 12 % by mass for insulating castables. Avoid stoppage in

49、the gun, hose and/or nozzle caused by predampening. Where necessary, to prevent sticking, apply a plate-release agent, such as light oil or grease, to the support plate. Place the support plate against a rigid surface, typically at an angle of 60 to 80 to the horizontal. Record the angle of inclination and include it in the test report. Using the minimum amount of water that allows the refractory to adhere to the sprayed surface, adjust the air pressure until the material flows freely from the nozzle. This operation shoul