1、Designation: C73 14C73 17Standard 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
2、in parentheses 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 from san
3、d and lime and intended for use in brick masonry. Two grades ofbrick are covered:1.1.1 Grade SWBrick intended for use where exposed to temperature below freezing in the presence of moisture.NOTE 1As a typical example, brick used for foundation courses and parapets in the northeastern quarter of the
4、United States should conform to GradeSW.1.1.2 Grade MWBrick intended for use where exposed to temperature below freezing but unlikely to be saturated with water.NOTE 2As a typical example, brick exposed in the face of the wall other than parapet or foundations, or brick intended for structures locat
5、ed in regionsof the United States characterized by less severe frost action or by drier climate than is found in the northeastern quarter of the United States shouldconform to Grade MW.1.1.3 When the term brick is used in this specification, it is understood to mean brick or solid masonry units.1.2
6、If brick having a particular color, texture, finish, or uniformity is desired, these features shall be specified separately by thepurchaser.1.3 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes(excluding those in tables and figures
7、) shall not be considered as requirements of the standard.1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information only and are not considered standard.1.5 This international st
8、andard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee.2. Re
9、ferenced Documents2.1 ASTM Standards:2C140 Test Methods for Sampling and Testing Concrete Masonry Units and Related UnitsC1232 Terminology of Masonry3. Terminology3.1 Terminology defined in Terminology C1232 shall apply for this specification.4. Physical Requirements4.1 The brick shall conform to th
10、e physical requirements for the grade specified, as prescribed in Table 1.4.2 Unless otherwise specified by the purchaser, brick of Grades SW and MW shall be accepted. Grade SW shall be acceptedin lieu of Grade MW.1 This specification is under the jurisdiction of ASTM Committee C15 on Manufactured M
11、asonry Units and is the direct responsibility of Subcommittee C15.03 onConcrete Masonry Units and Related Units.Current edition approved Dec. 1, 2014June 1, 2017. Published January 2015July 2017. Originally approved in 1928. Last previous edition approved in 20102014 asC73 10.C73 14. DOI: 10.1520/C0
12、073-14.10.1520/C0073-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard
13、 and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases on
14、ly the current versionof the standard as published by ASTM is to be considered the official document.*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 States15. Dimensions and Pe
15、rmissible Variations5.1 The size of brick shall be as specified by the purchaser and the average size of brick furnished shall approximate the sizespecified in the invitation for bids.5.2 No overall dimension (width, height, and length) shall differ by more than 618 in. (3.2 mm) from the specified s
16、tandarddimension. The width requirement does not apply to textured finishes such as split or rocked faces. Standard dimensions of unitsare the manufacturers designated dimensions.6. Finish and Appearance6.1 All units shall be sound and free of cracks or other defects that interfere with the proper p
17、lacement of the unit or significantlyimpair the strength or permanence of the construction. Minor cracks incidental to the usual methods of manufacture, or minorchipping resulting from customary methods of handling in shipment and delivery are not grounds for rejection.6.2 Where units are to be used
18、 in exposed wall construction, the face or faces that are to be exposed shall not show chips orcracks not otherwise permitted or other imperfections, when viewed from a distance of not less than 20 ft (6.1 m) under diffusedlight.6.2.1 Five percent of a shipment containing chips, not larger than 12 i
19、n. (12.7 mm) in any dimension, or cracks not wider than0.02 in. (0.5 mm) and not longer than 25 % of the nominal height 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 shall conformto an approved sample consis
20、ting of not less than four units, representing the range of color and texture specified.7. Methods of Sampling and Testing7.1 The purchaser or the purchasers authorized representative shall be accorded proper facilities to inspect and sample the unitsat the place of manufacture from the lots ready f
21、or delivery.7.2 Compressive strength, absorption, density, and dimensional tolerances shall be based on tests of calcium silicate brick ofany configuration or dimensions made with the same materials, mix design, manufacturing process, and curing method, conductedin accordance with Test Methods C140
22、and within 12 months of production of the units.not more than 12 months prior to delivery.8. Compliance8.1 If a sample fails to conform to the specified requirements, the manufacturer shall be permitted to remove units from theshipment. A new sample shall be selected by the purchaser from remaining
23、units from the shipment with a similar configurationand dimension and tested at the expense of the manufacturer. If the second sample meets the specified requirements, the remainingportion of the shipment represented by the sample meets the specified requirements. If the second sample fails to meet
24、the specifiedrequirements, the remaining portion of the shipment represented by the sample fails to meet the specified requirements.9. Keywords9.1 absorption; brick; calcium silicate face brick; compressive strength; masonry units; sand-lime brickTABLE 1 Physical RequirementsDesignationCompressive S
25、trengthmin, 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)C73 172SUMMARY OF CHANGESCommittee C15 has identified the location of selected changes to this s
26、tandard since the last issue(C73 10C73 14) that may impact the use of this standard. (December(June 1, 2014)2017)(1) Revised Modified testing frequency in Section 7.27 to add a 12-month frequency for C140 tests.be based on time of delivery.ASTM International takes no position respecting the validity
27、 of any patent rights asserted in 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
28、to revision at any time by the responsible 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.
29、 Your comments will receive careful 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
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