1、Designation: C 27 98 (Reapproved 2002)Standard Classification ofFireclay and High-Alumina Refractory Brick1This standard is issued under the fixed designation C 27; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last r
2、evision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This classification covers machine-made fi
3、reclay andhigh-alumina refractory brick, and its purpose is to set forth thevarious classes and types of these materials in accordance withtheir normal and characteristic properties, which are importantin their use.2. Referenced Documents2.1 ASTM Standards:C 16 Test Method for Load Testing Refractor
4、y Brick atHigh Temperatures2C 24 Test Method for Pyrometric Cone Equivalent (PCE) ofFireclay and High-Alumina Refractory Materials2C 113 Test Method for Reheat Change of Refractory Brick2C 133 Test Methods for Cold Crushing Strength and Modu-lus of Rupture of Refractories2C 134 Test Methods for Size
5、, Dimensional Measurements,and Bulk Density of Refractory Brick and InsulatingFirebrick2NOTE 1Chemical analysis of refractory products is determined by acombination of x-ray fluorescence (XRF) and inductively coupled plasma(ICP) using standard reference materials (SRM), including various typesof min
6、erals and refractory materials that are available from the NationalInstitute of Standards and Technology3and other appropriate sources.3. Significance and Use3.1 Alumina-silica refractory brick is produced from vari-ous combinations of alumina and silica-containing materials.These bricks can vary in
7、 chemical composition from almost100 % alumina and little silica to almost 100 % silica and littlealumina. It is therefore useful to establish a classificationscheme based on physical properties and chemical analysis.One group, fireclay brick, is classified based on physicalproperties since some ove
8、rlap of alumina and silica content canoccur. A second group, high-alumina brick, is classified prima-rily based on alumina content. The classification allows thosefamiliar with refractory materials to group similar productsfrom various suppliers in a standard and consistent manner.4. Basis of Classi
9、fication4.1 Fireclay Brick are divided into five different classes:4.1.1 Super-duty,4.1.2 High-duty,4.1.3 Semi-silica,4.1.4 Medium-duty, and4.1.5 Low-duty.4.2 The super- and high-duty classes are divided further intothree types under each class.4.3 High-Alumina Brick are divided into seven different
10、classes by percent alumina:4.3.1 50,4.3.2 60,4.3.3 70,4.3.4 80,4.3.5 85,4.3.6 90, and4.3.7 99.5. Properties5.1 The properties required for compliance with a class ortype are shown in Table 1.6. Test Specimens6.1 Testing for compliance with this classification shall beperformed on 9 by 412 by 212 or
11、3-in. (228 by 114 by 64 or76-mm) rectangular brick as made, or on specimens of eithersize cut from larger units having dimensions not more than 3in. (76 mm) in thickness, 634 in. (171 mm) in width, and 1312in. (342 mm) in length.7. Test Methods7.1 The properties enumerated in this classification sha
12、ll bedetermined in accordance with the following ASTM testmethods:7.1.1 Pyrometric Cone Equivalent (PCE) Test MethodC 24.1This classification is under the jurisdiction of ASTM Committee C08 onRefractories and is the direct responsibility of Subcommittee C08.92 on The JosephE. Kopanda Subcommittee fo
13、r Editorial, Terminology, and Classification.Current edition approved Sept 10, 1997. Published November 1998. Originallypublished as C 27 58. Last previous C 27 97.2Annual Book of ASTM Standards, Vol 15.01.3Available from the National Institute of Standards and Technology (NIST),Gaithersburg, MD 208
14、99.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.1.2 Reheat Test for Super-Duty Brick (2910F, 1600C)Schedule C of Test Method C 113.7.1.3 Load Test (2460F, 1350C)Schedule No. 2 ofMethod C 16.7.1.4 Modulus of RuptureTest Methods C
15、 133.7.1.5 Bulk DensityTest Methods C 134.7.1.6 Silica and Alumina ContentsXRF and ICP.8. Retests8.1 If variables result from sampling or a lack of satisfactoryreproducibility in tests conducted by different laboratories, thematerial shall be resampled and retested when requested byeither the manufa
16、cturer or the purchaser. This is applicable ininstances when the first test results do not conform to therequirements prescribed in this classification. The final resultsto be used shall be the average of at least two sets of results,each of which has been obtained by following in detail thespecifie
17、d testing procedures.9. Keywords9.1 fireclay brick; high-alumina brick; propertiesASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the v
18、alidity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your c
19、omments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments ha
20、ve not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multipl
21、e copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).TABLE 1 Fireclay and High Alumina Refractory Brick Classified According to Classes and Subdivided i
22、nto TypesClass Type PCE, minHot LoadSubsidence, max, %Reheat Shrinkage,max, %Modulus ofRupture, min, psi(MPa)Other Test RequirementsFireclay Brick:Super-duty Regular 33 . . . 1.0 at 2910F 600 (4.14) . . .(1600C)Spall-resistant 33 . . . 1.0 at 2910F 600 (4.14) . . .(1600C)Slag-resistant 33 . . . . .
23、. 1000 (6.89) Bulk density, min, 140 lb/ft3(2.24 g/cm3)High-duty RegularSpall-resistant31123112.500 (3.45).Slag-resistant 3112 . . . . . . 1200 (8.27) Bulk density, min, 137 lb/ft3(2.19 g/cm3) or porosity,max, 15 %Semi-silica . . . 1.5 at 2460F . . . 300 (2.07) Silica (SiO2) content, min, 72 %(1350C
24、)Medium-duty 29 . . . . . . 500 (3.45) . . .Low-duty 15 . . . . . . 600 (4.14) . . .High-Alumina Brick: Alumina (Al2O3) content, %:Alumina, %:50 34 . . . 506 2.560 35 . . . 606 2.570 36 . . . 706 2.580 37 . . . 806 2.585 . . . . 856 2.090 . . . . 906 2.099 . . . . . . . . . . . . min, 97C 27 98 (2002)2
