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1、J I S R*22Ub 91 4933608 0506418 980 JIS JAPANESE INDUSTRIAL STANDARD Testing method for cold crushing strength of refractory bricks JIS R 2 2 0 6 - 1 9 9 1 Translated and Published bY Japanese Standards Association UDC 666.76:620.173 Printed in Japan 4 s Copyright Japanese Standards Association Prov
2、ided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 19:08:18 MSTNo reproduction or networking permitted without license from IHS -,-,- J I S R+220b 9L W 4933b08 0506439 817 m In the went of any doubt arising, the original Standard in Japa
3、nese is to be final authority. a e e 8 c e Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 19:08:18 MSTNo reproduction or networking permitted without license from IHS -,-,- . JIS R*220b 91
4、 m 4933608 050b420 539 m UDC 666.76:620.173 JAPANESE INDUSTRIAL STANDARD J I S Testing method for cold crushing strength of refractory bricks R 2206-1991 1. Scope This Japanese Industrial Standard specifies the test method for cold crushing strength of refractory bricks. Remarks 1. Applicable standa
5、rds to this Standard are shown in the followings: JIS R 2202 Methods of Measuring Dimensions of Refractory Bricks JIS Z 8401 Rules for Rounding off of Numerical Values 2. The units and numerical values given in 1 in this Standard are in accordance with the traditional units, and are appended for inf
6、ormative reference. 2. Apparatus 2.1 Drying equipment The thermostat with automatic thermo-regulator capable of maintaining the temperature at 105 to 120C shall be used. 2.2 Compression testing machine The compression testing machine shall be as follows: (1) The testing machine must have the maximum
7、 crushing capacity of at least 50 t minimum with a variable oil pressure system without transmitting pulsation to a platen during application of load. The tolerance on graduation shall be *-&j for respective load. (2) 3) The platen must be of polished heat-treated steel with the hardness of not less
8、 than 70 of Shore. 4) The pressed surface must be provided with a spherical seat and the testing machine must be so constructed as to permit the upper and lower platens to be parallel during loading. 2.3 Length gauge 0.5 mm shall be used. The length gauge capable of measuring to the nearest 0 2.4 We
9、ighing instrument The balance capable of weighing to the nearest 1 g shall be used. 3. Sample 3.1 Prepare two test pieces in cubical form having a side of about 60 rnm from the refractory bricks to be tested. of half size may be cut longitudinally to make test pieces. For the ordinary shape of brick
10、s, two pieces Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 19:08:18 MSTNo reproduction or networking permitted without license from IHS -,-,- J I S R*w2ZOb 91 4933b08 050b421 475 2 R 220
11、6-1991 3.2 When it is not possible to take the above stated test piece, take from the refractory bricks to be tested the largest cubical sample whereby two specified test pieces are obtained, and let that be the test piece. perpendicular to the loading direction when the sample refractory brick was
12、made, and prepared so that the top and bottom surfaces are parallel and smooth. 3.3 As a rule, the test piece shall be capable of being pressed in the direction Further, in the case of the burnt refractory brick, at least more than one side of the burnt surface shall be left. 3.4 The number of test
13、pieces used for the test shall be two. 4. Operation 4.1 The capacity of the testing machine shall be so adjusted that the load tested is within 15 to 85 % of that of the testing machine. 4.2 The test piece shall be used after previously being dried to a constant weight ( I ) at 105 to 120C. Note ()
14、If no difference in measured mass of 1 g or more is found, it is considered a constant weight. 4.3 The dimensions of pressed surface shall have been measured preliminarily to the nearest 0.5 mm for each test piece ( 2 ) , and as required, a piece of paper shall be inserted on the pressed surface to
15、equalize the pressure. Note (2) The measurement of dimensions shall conform to JIS R 2202, as appropriate. 4.4 In testing, the pressed surface of the test piece shall be correctly placed at the centre of the spherical seat. 4.5 as standard and determine the maximum load N kgf)J when the test piece i
16、s crushed. The rate of application of load shall be 1.0 to 1.5 MPa (10 to 15 kgf/cm? 5. Calculation The crushing strength MPa kgf/cmzI c shall be calculated according to the following formula, and rounded off to the integral number according to JIS Z 8401. W a x b c = - Copyright Japanese Standards
17、Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 19:08:18 MSTNo reproduction or networking permitted without license from IHS -,-,- J I S R*220b 91 4733608 050b422 303 = 3. R 2206-1991 where, w : maximum load (N) kgf a
18、, b : longitudinal and lateral dimensions of pressed surface (cm) 6. Report The average of the calculated values for two test pieces, rounded off to the integral number according to JIS Z 8401, shall be reported as the crushing strength of refractory bricks tested. the report shall include the dimen
19、sions of the test pieces additionally. When the test pieces are prepared according to 3.2, Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 19:08:18 MSTNo reproduction or networking permitte
20、d without license from IHS -,-,- J I S R*220b 91 m 4933608 0506423 248 = R 2206-1991 Edition 1 Japanese Text Established by Minister of International Trade and Industry Date of Establishment: 1950-04-19 Date of Revision: 1991-10-01 Date of Public Notice in Official Gazette: 1991-10-03 Investigated b
21、y: Japanese Industrial Standards Committee Divisional Council on Ceramics This English translation is published by: Japanese Standards Association 1-24, Akasaka 4, Minato-ku, Tokyo 107 Japan O JSA, 1992 Printed in Tokyo by Hohbunsha Co., Ltd. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/10/2007 19:08:18 MSTNo reproduction or networking permitted without license from IHS -,-,-