1、Designation: C73 14Standard 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. A number in p
2、arentheses 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 U.S. Department of Defense.1. Scope*1.1 This specification covers brick made principally fromsand a
3、nd 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 Unite
4、d 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 reg
5、ions 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 h
6、aving 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 no
7、t be consideredas requirements 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.2. Referenced Documents2.1 ASTM Standa
8、rds:2C140 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 grad
9、e 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 size of
10、 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 faces.
11、 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 cracks
12、incidental to the usual methods 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 Dec. 1, 2014. Published January 2015. Origina
13、llyapproved in 1928. Last previous edition approved in 2010 as C73 10. DOI:10.1520/C0073-14.2For 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 S
14、ummary 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 States1manufacture, or minor chipping resulting from customarymethods of handling in shipment and
15、 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 from a distance of not less than 20 ft (6.1 m) underdiffused light.6.2.
16、1 Five percent of a shipment containing chips, not largerthan12 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 wil
17、l be exposed in place shallconform to an approved sample 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 sa
18、mplethe units at the place of manufacture from the lots ready fordelivery.7.2 Compressive strength, absorption, density, and dimen-sional tolerances shall be based on tests of calcium silicatebrick of any configuration or dimensions made with the samematerials, mix design, manufacturing process, and
19、 curingmethod, conducted in accordance with Test Methods C140 andwithin 12 months of production of the units.8. Compliance8.1 If a sample fails to conform to the specifiedrequirements, the manufacturer shall be permitted to removeunits from the shipment. A new sample shall be selected by thepurchase
20、r from remaining units from 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 sampl
21、e fails to meet the specified 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 i
22、dentified the location of selected changes to this standard since the last issue (C73 10)that may impact the use of this standard. (December 1, 2014)(1) Revised 7.2 to add a 12-month frequency for C140 tests.ASTM International takes no position respecting the validity of any patent rights asserted i
23、n connection with any item mentionedin 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 r
24、esponsible technical committee and 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 car
25、eful consideration at a meeting 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 Internation
26、al, 100 Barr Harbor Drive, PO Box 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
27、ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1 Physical RequirementsDesignationCompressive Strengthmin, psi (MPa), (bricktested flatwise) averagegross areaWaterAbsorption,maxlb/ft3(kg/m3)Average of3 BrickIndividualBrickGrade SWGrade MW5500 (37.9)3500 (24.1)4500 (31.0)3000 (20.7)15 (240)18 (288)C73142
