1、Designation:C7317Standard Specification forCalcium Silicate Brick(Sand-Lime Brick)1This standard is issued under the fixed designation C73;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parenthes
2、es indicates the year of last reapproval.Asuperscriptepsilon()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 brick made principally fromsand and lime and in
3、tended for use in brick masonry.Twogrades of brick are covered:1.1.1 Grade SWBrick intended for use where exposed totemperature below freezing in the presence of moisture.NOTE1As a typical example,brick used for foundation courses andparapets in the northeastern quarter of the United States should c
4、onformto Grade SW.1.1.2 Grade MWBrick intended for use where exposed totemperature below freezing but unlikely to be saturated withwater.NOTE2As a typical example,brick exposed in the face of the wallother than parapet or foundations,or brick intended for structures locatedin regions of the United S
5、tates characterized by less severe frost action orby drier climate than is found in the northeastern quarter of the UnitedStates should conform to Grade MW.1.1.3 When the term brick is used in this specification,it isunderstood to mean brick or solid masonry units.1.2 If brick having a particular co
6、lor,texture,finish,oruniformity is desired,these features shall be specified sepa-rately by the purchaser.1.3 The text of this standard references notes and footnoteswhich provide explanatory material.These notes and footnotes(excluding those in tables and figures)shall not be consideredas requireme
7、nts of the standard.1.4 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.1.5 This international standard was developed in accor-dance with
8、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:2C140
9、 Test Methods for Sampling and Testing ConcreteMasonry Units and Related UnitsC1232 Terminology of Masonry3.Terminology3.1 Terminology defined in Terminology C1232 shall applyfor this specification.4.Physical Requirements4.1 The brick shall conform to the physical requirements forthe grade specified
10、,as prescribed in Table 1.4.2 Unless otherwise specified by the purchaser,brick ofGrades SW and MW shall be accepted.Grade SW shall beaccepted in lieu of Grade MW.5.Dimensions and Permissible Variations5.1 The size of brick shall be as specified by the purchaserand the average size of brick furnishe
11、d shall approximate thesize specified in the invitation for bids.5.2 No overall dimension(width,height,and length)shalldiffer by more than 618in.(3.2 mm)from the specifiedstandard dimension.The width requirement does not apply totextured finishes such as split or rocked faces.Standarddimensions of u
12、nits are the manufacturers designated dimen-sions.6.Finish and Appearance6.1 All units shall be sound and free of cracks or otherdefects that interfere with the proper placement of the unit orsignificantly impair the strength or permanence of the construc-tion.Minor cracks incidental to the usual me
13、thods of1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of SubcommitteeC15.03 on Concrete Masonry Units and Related Units.Current edition approved June 1,2017.Published July 2017.Originally approvedin 1928.Last previou
14、s edition approved in 2014 as C73 14.DOI:10.1520/C0073-17.2For 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 Summa
15、ry 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 th
16、e Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 manufacture,or minor chipping resulting from customarymethods of handling in shipment and delivery are not groundsfor rejection.6.2 Where units are to be used in exposed wall construction,the face or faces that are to be exposed shall not show chips orcracks not otherwise permitted or other imperfections,whenviewed fr
