1、Designation:C3213American Association StateHighway and Transportation Officials StandardAASHTO No.:M91-78Standard Specification forSewer and Manhole Brick(Made From Clay or Shale)1This standard is issued under the fixed designation C32;the number immediately following the designation indicates the y
2、ear of originaladoption or,in the case of revision,the year of last revision.Anumber 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 Department of
3、Defense.1.Scope*1.1 This specification covers brick intended for use in(1)drainage structures for the conveyance of sewage,industrialwastes,and storm water,and(2)related structures such asmanholes and catch basins.1.2 The property requirements of this standard apply at thetime of purchase.The use of
4、 results from testing of brickextracted from masonry structures for determining confor-mance or non-conformance to the property requirements(Sec-tion 5)of this standard is beyond the scope of this standard.1.3 Brick covered by this standard are manufactured fromclay,shale,or similar naturally occurr
5、ing substances andsubjected to a heat treatment at elevated temperatures(firing).The heat treatment must develop sufficient fired bond betweenthe particulate constituents to provide the strength and dura-bility requirements of this specification.(See firing and firedbond in Terminology C1232.)1.4 Th
6、e 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 Standards:2C67 Test Methods for Sampling and Testing Brick an
7、dStructural Clay TileC1232 Terminology of Masonry3.Terminology3.1 DefinitionsFor definitions relating to sewer and man-hole brick,refer to Terminology C1232.4.Classification4.1 GradesTwo grades of sewer brick are covered:4.1.1 Grade SSBrick intended for use in structures requir-ing low absorption an
8、d resistance to the action of sewagecarrying large quantities of abrasive material at velocitiesexceeding 8 ft(2.4 m)/s.4.1.2 Grade SMBrick intended for use in structures re-quiring resistance to the action of sewage carrying abrasivematerials at velocities less than 8 ft(2.4 m)/s.4.2 GradesTwo grad
9、es of manhole brick are covered:4.2.1 Grade MSBrick intended for use in manholes andcatch basins not requiring high degrees of abrasive resistancebut where a high and uniform degree of resistance to frostaction and disintegration is needed when the brick may befrozen when permeated with water.4.2.2
10、Grade MMBrick intended for use in manholes notrequiring high degrees of abrasive resistance but where amoderate and nonuniform degree of resistance to frost actionand disintegration is needed when the brick may be permeatedwith water.5.Physical Properties5.1 Brick for sewer or drainage structures sh
11、all conform tothe physical properties for the specified Grades SS or SM asestablished in Table 1.5.2 Brick for manholes,catch basins,and other relatedstructures shall conform to the physical properties for thespecified Grades MS or MM as established in Table 1.5.3 Unless otherwise specified by the p
12、urchaser,brick ofGrade SS shall be accepted instead of Grade SM;also GradeMS shall be accepted instead of Grade MM.6.Dimensions and Permissible Variations6.1 The size of the brick shall be specified by the purchaser,selecting any of the standard sizes of building brick.6.2 For any lot of sewer brick
13、 furnished under thisspecification,not more than 2%of the brick shall vary fromthe nominal size requirements specified in 6.1 by more than618in.(3 mm)in either transverse dimension,or by morethan 614in.(6 mm)in length.1This specification is under the jurisdiction of ASTM Committee C15 onManufactured
14、 Masonry Units and is the direct responsibility of SubcommitteeC15.02 on Brick and Structural Clay Tile.Current edition approved June 1,2013.Published June 2013.Originallyapproved in 1921.Last previous edition approved in 2011 as C32 11.DOI:10.1520/C0032-13.2For referenced ASTM standards,visit the A
15、STM 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 Harbo
16、r Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Finish and Appearance7.1 Sewer brick shall have plain or smooth surfaces on bothends and on the face side.7.2 Manhole brick shall have plain,slightly,or moderatelytextured surfaces.7.3 The brick,as delivered to the site,shall conform byvisual inspection to the requirements specified by the purchaseror to the sample or samples approved as standard of compari-son and to the samples passing the tests for physical require-ments.Min
