ASTM_C_652_-_19.pdf

Designation:C65219Standard 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 revision.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 U.S.Department of Defense.1.Scope*1.1 This specification covers hollow building brick 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 cross-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 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.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 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.)1.3.1 This specification and its individual requirements shallnot be used to qualify or corroborate the performance of amasonry unit made from other materials,or made with otherforming methods,or other means of binding the materials.1.4 Hollow brick differ from unglazed structural clay tile(Specifications C34 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 and 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 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.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C34 Specification for Structural Clay Loadbearing Wall TileC62 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 Specification for Facing Brick(Solid Masonry UnitsMade from Clay or Shale)C902 Specification for Pedestrian and Light Traffic PavingBrickC1232 Terminology for Masonry1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of SubcommitteeC15.02 on Brick and Structural Clay Tile.Current edition approved April 15,2019.Published May 2019.Originallyapproved in 1970.Last previous edition approved in 2017 as C652 17a.DOI:10.1520/C0652-19.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barr