ASTM C652-2012a Standard Specification for Hollow Brick (Hollow Masonry Units Made From Clay or Shale)《空心砖(粘土或页岩制空心砌块)的标准规格》.pdf
《ASTM C652-2012a Standard Specification for Hollow Brick (Hollow Masonry Units Made From Clay or Shale)《空心砖(粘土或页岩制空心砌块)的标准规格》.pdf》由会员分享,可在线阅读,更多相关《ASTM C652-2012a Standard Specification for Hollow Brick (Hollow Masonry Units Made From Clay or Shale)《空心砖(粘土或页岩制空心砌块)的标准规格》.pdf(7页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C652 12aStandard Specification forHollow Brick (Hollow Masonry Units Made From Clay orShale)1This standard is issued under the fixed designation C652; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last re
2、vision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () 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. Scope*1.1 This specification covers hollow building b
3、rick andhollow facing brick made from clay, shale, fire clay, ormixtures thereof, and fired to incipient fusion. Four types ofhollow brick in each of two grades and two classes are covered.In this specification, the term hollow brick shall be understoodto mean hollow clay masonry units whose net cro
4、ss-sectionalarea (solid area) in any plane parallel to the surface, containingthe cores, cells, or deep frogs, is less than 75 % of its grosscross-sectional area measured in the same plane (see 4.3). Thisspecification does not cover brick intended for use as pavingbrick (see Specification C902).1.2
5、The property requirements of this specification apply atthe time of purchase. The use of results from testing of brickextracted from masonry structures for determining confor-mance or nonconformance to the property requirements (Sec-tion 6) of this standard is beyond the scope of this specification.
6、1.3 Brick covered by this specification are ceramic productsmanufactured primarily from clay, shale, or similar naturallyoccurring substances and subjected to a heat treatment atelevated temperatures (firing). The heat treatment shall developsufficient fired bond between the particulate constituents
7、 toprovide the strength and durability requirements of this speci-fication. Additives or recycled materials are permitted to beincluded at the option of the manufacturer. (See “firing” and“firing bond” in Terminology C1232.)1.4 Hollow brick differ from unglazed structural clay tile(Specifications C3
8、4 and C212) and solid brick (SpecificationsC62 and C216). Hollow brick require greater shell and webthicknesses and higher minimum compressive strength thanstructural clay tile, but permit greater void area and lesserdistance from exposed edge to core hole than solid brick.Therefore, environmental a
9、nd structural performance may bedifferent in elements constructed of hollow brick from thoseconstructed of structural clay tile or solid brick.1.5 The text of this specification references notes andfootnotes which provide explanatory material. These notes andfootnotes (excluding those in tables and
10、figures) shall not beconsidered as requirements of the specification.1.6 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2. Referenced Do
11、cuments2.1 ASTM Standards:2C34 Specification for Structural Clay Load-Bearing WallTileC62 Specification for Building Brick (Solid Masonry UnitsMade From Clay or Shale)C67 Test Methods for Sampling and Testing Brick andStructural Clay TileC212 Specification for Structural Clay Facing TileC216 Specifi
12、cation for Facing Brick (Solid Masonry UnitsMade from Clay or Shale)C902 Specification for Pedestrian and Light Traffic PavingBrickC1232 Terminology of MasonryE835/E835M Guide for Modular Coordination of Clay andConcrete Masonry Units (Withdrawn 2011)33. Terminology3.1 DefinitionsFor definitions rel
13、ating to masonry andhollow brick, refer to Terminology C1232.4. Classification4.1 GradesTwo grades of hollow brick are covered:1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of SubcommitteeC15.02 on Brick and Structur
14、al Clay Tile.Current edition approved Dec. 1, 2012. Published January 2013. Originallyapproved in 1970. Last previous edition approved in 2012 as C652 12. DOI:10.1520/C0652-12A.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. F
15、or Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 B
16、arr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.1 Grade SWHollow brick intended for use where ahigh and uniform degree of resistance to frost action anddisintegration by weathering is desired and the exposure issuch that the hollow brick may be frozen when permeate
17、d withwater.4.1.2 Grade MWHollow brick intended for use where amoderate and somewhat nonuniform degree of resistance tofrost action is permissible or where they are unlikely to bepermeated with water when exposed to temperatures belowfreezing.4.2 TypesFour types of hollow brick are covered:4.2.1 Typ
18、e HBSHollow brick for general use in masonry.4.2.2 Type HBXHollow brick for general use in masonrywhere a higher degree of precision and lower permissiblevariation in size than permitted for Type HBS is required.4.2.3 Type HBAHollow brick for general use in masonryselected to produce characteristic
19、architectural effects resultingfrom nonuniformity in size and texture of the individual units.4.2.4 Type HBBHollow brick for general use in masonrywhere a particular color, texture, finish, uniformity, or limits oncracks, warpage, or other imperfections detracting from theappearance are not a consid
20、eration.4.2.5 When the type is not specified, the requirements forType HBS shall govern.4.3 ClassTwo classes of hollow brick are covered:4.3.1 Class H40VHollow brick intended for use wherevoid areas or spaces greater than 25 %, but not greater than40 %, of the gross cross-sectional area of the unit
21、measured inany plane parallel to the surface containing the cores, cells, ordeep frogs are desired. The void spaces, the web thicknesses,and the shell thicknesses shall comply with the requirements ofSection 10 on Coring and Frogging.4.3.2 Class H60VHollow brick intended for use wherelarger void are
22、as are desired. The sum of these void areas shallbe greater than 40 %, but not greater than 60 %, of the grosscross-sectional area of the unit measured in any plane parallelto the surface containing the cores, cells or deep frogs. Thevoid spaces, the web thicknesses, and the shell thicknessesshall c
23、omply with the requirements of Section 10 on Coringand Frogging and to the minimum requirements contained inTable 1 (see Fig. 1).4.3.3 When the class is not specified, the requirements ofClass H40V shall govern.5. Materials and Manufacture5.1 The body of all hollow brick shall be of clay, shale, fir
24、eclay, or mixtures of these materials, with or withoutadmixtures, burned to meet the requirements of this specifica-tion. Any coloring or other materials added to the clay shall besuitable ceramic materials and shall be well distributedthroughout the body.5.2 Colors and textures produced by applicat
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