1、Designation: C 55 06e1Standard Specification forConcrete Building Brick1This standard is issued under the fixed designation C 55; 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 parentheses in
2、dicates 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.e1NOTEMetric conversions in Table 1 were editorially corrected in June 2007.1. Scope*1.1
3、This specification covers solid, dry-cast, concrete build-ing brick intended for interior and exterior use in constructingstructural masonry, and are made from portland cement, water,and suitable mineral aggregates with or without the inclusionof other materials.NOTE 1Specification C 1634 addresses
4、concrete facing brick used infacing applications and other exposures (previously referred to in earliereditions of this standard as Grade Nfor use as architectural veneer andfacing units in exterior walls and for use where high-strength andresistance to moisture penetration and severe frost action a
5、re desired). Thisspecification differs from C 1634 in that it addresses properties forconcrete building brick used in non-facing, utilitarian applications (pre-viously referred to in earlier editions of this specification as Grade Sforgeneral use where moderate strength and resistance to frost actio
6、n andmoisture penetration are required).1.2 The text of this specification references notes andfootnotes which provide explanatory material. These notes andfootnotes (excluding those in tables and figures) shall not beconsidered as requirements of the standard.1.3 The values stated in inch-pound uni
7、ts are to be regardedas the standard. The values given in parentheses are forinformation only.NOTE 2Concrete building brick covered by this specification aremade from lightweight or normal weight aggregates, or both.NOTE 3When particular features are desired, such as density classi-fication, high co
8、mpressive strength, surface textures for appearance orbond, finish, color, fire resistance, insulation, acoustical properties, orother special features, such properties should be specified separately bythe purchaser. Suppliers should be consulted as to the availability ofconcrete building brick havi
9、ng the desired features.2. Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC 140 Test Methods for Sampling and Testing ConcreteMasonry Units and Related UnitsC 150 Specification for Portland CementC 331 Specification for Lightweight Aggregates for Con-crete Masonry U
10、nitsC 426 Test Method for Linear Drying Shrinkage of Con-crete Masonry UnitsC 595 Specification for Blended Hydraulic CementsC 618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC 989 Specification for Ground Granulated Blast-FurnaceSlag for Use in Concrete and
11、 MortarsC 1157 Performance Specification for Hydraulic CementC 1209 Terminology of Concrete Masonry Units and Re-lated UnitsC 1232 Terminology of MasonryC 1634 Specification for Concrete Facing Brick3. Terminology3.1 Terminology defined in Terminology C 1209 and Ter-minology C 1232 shall apply for t
12、his specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 concrete building brick, na concrete masonry unit,with a maximum width of four (4) inches and of a weight thatwill typically permit it to be lifted and placed with one hand,that is manufactured for general use in non-facing,
13、utilitarianapplications.3.2.2 concrete facing brick, na concrete masonry unit,with a maximum width of four (4) inches and of a weight thatwill typically permit it to be lifted and placed with one hand,that is manufactured to be typically used in an applicationwhere one or more faces of the unit is i
14、ntended to be exposed.1This 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. 15, 2006. Published January 2007. Originallyapproved
15、 in 1924. Last previous edition approved in 2003 as C 55 03.2For 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.1
16、*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.4. Materials and Manufacture4.1 Cementitious MaterialsMaterials shall conform to thefollowing applicable specifications:
17、4.1.1 Portland CementSpecification C 150.4.1.2 Modified Portland CementPortland cement con-forming to Specification C 150, modified as follows:4.1.2.1 LimestoneCalcium carbonate, with a minimum85 % CaCO3content, is permitted to be added to the cement,provided these requirements of Specification C 15
18、0 as modi-fied are met:(1) Limitation on Insoluble Residue1.5 %.(2) Limitation on Air Content of MortarVolume percent,22 % max.(3) Limitation on Loss on Ignition7%.4.1.3 Blended Hydraulic CementsSpecification C 595.4.1.4 Hydraulic CementSpecification C 1157.4.1.5 PozzolansSpecification C 618.4.1.6 B
19、last Furnace Slag CementSpecification C 989.4.2 AggregatesAggregates shall conform to the followingspecifications, except that grading requirements shall notnecessarily apply:4.2.1 Normal Weight AggregatesSpecification C33.4.2.2 Lightweight AggregatesSpecification C 331.4.3 Other ConstituentsAir-ent
20、raining agents, coloringpigments, integral water repellents, finely ground silica, andother constituents shall be previously established as suitable foruse in concrete masonry units and shall conform to applicableASTM standards or shall be shown by test or experience not tobe detrimental to the dura
21、bility of the concrete masonry unitsor any material customarily used in masonry construction.5. Physical Requirements5.1 At the time of delivery to the purchaser, units shallconform to the physical requirements prescribed in Table 1.5.2 At the time of delivery to the purchaser, the total lineardryin
22、g shrinkage of units shall not exceed 0.065 % when testedin accordance with Test Method C 426.NOTE 4The purchaser is the public body or authority, association,corporation, partnership, or individual entering into a contract or agree-ment to purchase or install, or both, concrete building brick. The
23、time ofdelivery to the purchaser is FOB plant when the purchaser or thepurchasers agent transports the concrete building brick, or at the timeunloaded at the worksite if the manufacturer or the manufacturers agenttransports the concrete building brick.6. Dimensions and Permissible Variations6.1 No o
24、verall dimension (width, height, and length) shalldiffer by more than 618 in. (3.2 mm) from the specifiedstandard dimensions.NOTE 5Standard dimensions of concrete building brick are themanufacturers designated dimensions. Nominal dimensions of modularsize concrete building brick are equal to the sta
25、ndard dimensions plus thethickness of one mortar joint. Nominal dimensions of nonmodular sizeconcrete building brick usually exceed the standard dimensions by18 to14in. (3.2 to 6.4 mm).6.2 CoringUnless otherwise specified, brick shall be ei-ther solid or cored at the option of the seller. For cored
26、concretebuilding brick, the net cross-sectional area in any plane parallelto the surface containing the cores shall be at least 75 % of thegross cross-sectional area measure in the same plane. No partof any hole shall be less than34 in. (19.1 mm) from any edgeof the unit.7. Finish and Appearance7.1
27、All units shall be sound and free of cracks or otherdefects that interfere with the proper placement of the units orsignificantly impair the strength or permanence of the construc-tion. Minor cracks incidental to the usual method of manufac-ture or minor chipping resulting from customary methods ofh
28、andling in shipment and delivery are not grounds for rejec-tion.8. Methods of Sampling and Testing8.1 The purchaser or authorized representative shall beaccorded proper facilities to inspect and sample the concretebuilding brick at the place of manufacture from the lots readyfor delivery.8.2 Sample
29、and test concrete building brick in accordancewith Test Methods C 140 and Test Method C 426, whenapplicable.8.3 Total linear drying shrinkage shall be based on tests ofconcrete building brick made with the same materials, concretemix design, manufacturing process, and curing method, con-ducted in ac
30、cordance with Test Method C 426 not more than 24months prior to delivery.9. Compliance9.1 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 the sh
31、ipment 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 specified requ
32、irements, theremaining portion of the shipment represented by the samplefails to meet the specified requirements.TABLE 1 Strength, Absorption, and Density Classification RequirementsADensityClassificationOven-Dry Densityof Concrete, lb/ft3(kg/m3)Maximum WaterAbsorption, lb/ft3(kg/m3)Minimum Net Area
33、Compressive Strength, lb/in2(MPa)Average of 3 Units Average of 3 Units Individual Units Average of 3 Units Individual UnitsLightweight Less than 105 (1680) 18 (288) 20 (320) 2500 (17.2) 2000 (13.8)Medium Weight 105 to less than 125 (16802000) 15 (240) 17 (272) 2500 (17.2) 2000 (13.8)Normal Weight 12
34、5 (2000) or more 13 (208) 15 (240) 2500 (17.2) 2000 (13.8)AAverage oven-dry density, based on a set of three units, shall fall within ranges defined in the table to be classified as lightweight, medium weight, or normal weight. Editorially corrected.C5506e12NOTE 6Unless otherwise specified in the pu
35、rchase order, the costs oftests is typically borne as follows: (1) if the results of the tests show thatthe units do not conform to the requirements of this specification, the costis typically borne by the seller; (2) if the results of the tests show that theunits conform to the specification requir
36、ements, the cost is typically borneby the purchaser.10. Keywords10.1 absorption; compressive strength; concrete brick; con-crete building brick; concrete masonry units; linear shrinkage;portland cementSUMMARY OF CHANGESCommittee C15 has identified the location of selected changes to this standard si
37、nce the last issue (C 55 03)that may impact the use of this standard. (Approved Dec. 15, 2006.)(1) The title of this specification was changed from ConcreteBrick to Concrete Building Brick.(2) Grade N and Grade S designations were removed. Changeswere made throughout to reflect scope change to addre
38、ss onlythose units used for utilitarian purposes.(3) Materials section was replaced to be consistent with otherconcrete masonry unit specifications.(4) New terminology was added for concrete facing brick andconcrete building brick.ASTM International takes no position respecting the validity of any p
39、atent 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 to revisi
40、on 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. Your co
41、mments 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 copyrigh
42、ted by ASTM International, 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 ASTM website(www.astm.org).C5506e13
