1、Designation: C 73 05Standard Specification forCalcium Silicate Brick (Sand-Lime Brick)1This standard is issued under the fixed designation C 73; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revision. A number in
2、 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. Scope*1.1 This specification covers brick made principally fromsand and
3、 lime and intended 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.NOTE 1As a typical example, brick used for foundation courses andparapets in the northeastern quarter of the United
4、States should conformto Grade SW.1.1.2 Grade MWBrick intended for use where exposed totemperature below freezing but unlikely to be saturated withwater.NOTE 2As a typical example, brick exposed in the face of the wallother than parapet or foundations, or brick intended for structures locatedin regio
5、ns of the United States 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 hav
6、ing a particular color, 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
7、be consideredas requirements of the standard.1.4 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.2. Referenced Documents2.1 ASTM Standards:2C 140 Test Methods for Sampling and Testing ConcreteMasonry Units and Related U
8、nitsC 1209 Terminology of Concrete Masonry Units and Re-lated UnitsC 1232 Terminology of Masonry3. Terminology3.1 Terminology defined in Terminology C 1209 and Ter-minology C 1232 shall apply for this specification.4. Physical Requirements4.1 The brick shall conform to the physical requirements fort
9、he grade specified, 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
10、size of brick furnished shall approximate thesize specified in the invitation for bids.5.2 No overall dimension (width, height, and length) shalldiffer by more than 618 in. (3.2 mm) from the specifiedstandard dimension. The width requirement does not apply totextured finishes such as split or rocked
11、 faces. Standarddimensions of units 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
12、cracks incidental to the usual methods of manu-facture, or minor chipping resulting from customary methodsof handling in shipment and delivery are not grounds forrejection.1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibilit
13、y of SubcommitteeC15.03 on Concrete Masonry Units and Related Units.Current edition approved May 15, 2005. Published June 2005. Originallyapproved in 1928. Last previous edition approved in 1999 as C 7399a.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer
14、Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Physical RequirementsDesignationCompressive Strengthmin, psi (MPa), (bricktested flatwise) averagegross areaWaterAbsorption,maxlb/ft3(kg/m3)Average
15、 of3 BrickIndividualBrickGrade SWGrade MW5500 (37.9)3500 (24.1)4500 (31.0)3000 (20.7)15 (240)18 (288)1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.2 Where units ar
16、e 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 from a distance of not less than 20 ft (6.1 m) underdiffused light.6.2.1 Five percent of a shipment containing chips, not larger
17、than12 in. (12.7 mm) in any dimension, or cracks not widerthan 0.02 in. (0.5 mm) and not longer than 25 % of the nominalheight of the unit is permitted.6.3 The color and texture shall be specified by the purchaser.The finished surface that will be exposed in place shallconform to an approved sample
18、consisting of not less than fourunits, representing the range of color and texture specified.7. Methods of Sampling and Testing7.1 The purchaser or the purchasers authorized representa-tive shall be accorded proper facilities to inspect and samplethe units at the place of manufacture from the lots r
19、eady fordelivery.7.2 Sample and test units in accordance with Test MethodsC 140.8. Compliance8.1 If a sample fails to conform to the specified require-ments, the manufacturer shall be permitted to remove unitsfrom the shipment. A new sample shall be selected by thepurchaser from remaining units from
20、 the shipment with asimilar configuration and dimension and tested at the expenseof the manufacturer. If the second sample meets the specifiedrequirements, the remaining portion of the shipment repre-sented by the sample meets the specified requirements. If thesecond sample fails to meet the specifi
21、ed requirements, theremaining portion of the shipment represented by the samplefails to meet the specified requirements.9. Keywords9.1 absorption; brick; calcium silicate face brick; compres-sive strength; masonry units; sand-lime brickSUMMARY OF CHANGESCommittee C15 has identified the location of s
22、elected changes to this standard since the last issue (C73 99a)that may impact the use of this standard.(1) Time reference for completion of tests was removed from section 7.1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item menti
23、onedin this standard. Users of this standard are expressly advised that determination of the validity 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 a
24、nd must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments 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
25、of theresponsible technical committee, which you may attend. If you feel that your comments have 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 Bo
26、x C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple 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).C73052
