ASTM C27-1998(2013) Standard Classification of Fireclay and High-Alumina Refractory Brick《耐火土及高矾土耐火砖的标准分类方法》.pdf
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1、Designation: C27 98 (Reapproved 2013)Standard Classification ofFireclay and High-Alumina Refractory Brick1This standard is issued under the fixed designation C27; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last rev
2、ision. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () 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 firec
3、lay 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.1.2 The values stated in inch-pound units are to be regardedas standard. The values give
4、n in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Documents2.1 ASTM Standards:2C16 Test Method for Load Testing Refractory Shapes atHigh TemperaturesC24 Test Method for Pyrometric Cone Equivalent (PCE) ofFirec
5、lay and High Alumina Refractory MaterialsC113 Test Method for Reheat Change of Refractory BrickC133 Test Methods for Cold Crushing Strength and Modu-lus of Rupture of RefractoriesC134 Test Methods for Size, Dimensional Measurements,and Bulk Density of Refractory Brick and InsulatingFirebrickNOTE 1Ch
6、emical 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 minerals and refractory materials that are available from the NationalInstitute of Standards and Te
7、chnology3and 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 chemical composition from almost100 % alumina and little silica to almost 100 % silica and litt
8、lealumina. 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 overlap of alumina and silica content canoccur. A second group, high-alumina brick, is classified p
9、ri-marily based on alumina content. The classification allowsthose familiar with refractory materials to group similarproducts from various suppliers in a standard and consistentmanner.4. Basis of Classification4.1 Fireclay Brick are divided into five different classes:4.1.1 Super-duty,4.1.2 High-du
10、ty,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 differentclasses 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.
11、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 3-in. (228 by 114 by 64 or76-mm) rectangular brick as made, or on specimens of eithersize cut fro
12、m larger units having dimensions not more than 3in. (76 mm) in thickness, 634 in. (171 mm) in width, and 1312in. (342 mm) in length.1This classification is under the jurisdiction of ASTM Committee C08 onRefractories and is the direct responsibility of Subcommittee C08.92 on The JosephE. Kopanda Subc
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