1、Designation: C1634 11Standard Specification forConcrete Facing Brick1This standard is issued under the fixed designation C1634; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indi
2、cates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers solid, dry-cast, concrete facingbrick intended for interior and exterior use in constructingstructural and facing masonry components a
3、nd are made fromportland cement, water, and suitable mineral aggregates with orwithout the inclusion of other materials.NOTE 1Specification C55 addresses concrete building brick used innon-facing, utilitarian applications (previously referred to in earliereditions of Specification C55 as Grade Sfor
4、general use where moderatestrength and resistance to frost action and moisture penetration arerequired). This specification differs from Specification C55 in that itincludes expanded consideration for properties of concrete brick used infacing applications and other exposures (previously referred to
5、 in earliereditions of Specification C55 as Grade Nfor use as architectural veneerand facing units in exterior walls and for use where high strength andresistance to moisture penetration and severe frost action are desired).1.2 The text of this specification references notes andfootnotes which provi
6、de 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 units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are p
7、rovided for information onlyand are not considered standard.NOTE 2Concrete facing brick covered by this specification are madefrom lightweight or normal weight aggregates, or both.NOTE 3When particular features are desired, such as density classi-fication, high compressive strength, surface textures
8、 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 facing brick having the desired features.2. Referenced
9、Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC55 Specification for Concrete Building BrickC140 Test Methods for Sampling and Testing ConcreteMasonry Units and Related UnitsC150 Specification for Portland CementC331 Specification for Lightweight Aggregates for Con-crete Mason
10、ry UnitsC426 Test Method for Linear Drying Shrinkage of ConcreteMasonry UnitsC595 Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or CalcinedNatural Pozzolan for Use in ConcreteC989 Specification for Slag Cement for Use in Concreteand MortarsC1157 Performance S
11、pecification for Hydraulic CementC1232 Terminology of Masonry3. Terminology3.1 Terminology defined in Terminology C1232 shall applyfor this 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
12、 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, 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 t
13、o 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 intended to be exposed.4. Materials and Manufacture4.1 Cementitious MaterialsMaterials shall conform to thefollowing applicable specifications:4.1.1 Portland CementS
14、pecification C150.4.1.2 Modified Portland CementPortland cement con-forming to Specification C150, 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 C150 as modifiedare met:(1)
15、Limitation on Insoluble Residue1.5 %.(2) Limitation on Air Content of MortarVolume percent,22 % max.(3) Limitation on Loss on Ignition7%.1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of SubcommitteeC15.03 on Concrete
16、 Masonry Units and Related Units.Current edition approved June 1, 2011. Published June 2011. Originallyapproved in 2006. Last previous edition approved in 2009 as C1634 09. DOI:10.1520/C1634-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at s
17、erviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.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,
18、United States.4.1.3 Blended Hydraulic CementsSpecification C595.4.1.4 Hydraulic CementSpecification C1157.4.1.5 PozzolansSpecification C618.4.1.6 Blast Furnace Slag CementSpecification C989.4.2 AggregatesAggregates shall conform to the followingspecifications, except that grading requirements shall
19、notnecessarily apply:4.2.1 Normal Weight AggregatesSpecification C33.4.2.2 Lightweight AggregatesSpecification C331.4.3 Other ConstituentsAir-entraining agents, coloringpigments, integral water repellents, finely ground silica, andother constituents shall be previously established as suitable foruse
20、 in concrete masonry units and shall conform to applicableASTM standards or shall be shown by test or experience not tobe detrimental to the durability of the concrete masonry unitsor any material customarily used in masonry construction.5. Physical Requirements5.1 At the time of delivery to the pur
21、chaser, units shallconform to the physical requirements prescribed in Table 1.5.1.1 When higher compressive strengths than those listedin Table 1 are specified, the tested average net area compres-sive strength of three units shall equal or exceed the specifiedcompressive strength, and the following
22、 single unit strengthrequirements shall apply.5.1.1.1 When the specified compressive strength is less than5000 psi, no single unit net area compressive strength testresult shall be less than the specified compressive strengthminus 500 psi.5.1.1.2 When the specified compressive strength is 5000 psior
23、 greater, no single unit net area compressive strength testresult shall be less than 90 % of the specified compressivestrength.5.2 At the time of delivery to the purchaser, the total lineardrying shrinkage of units shall not exceed 0.065 % when testedin accordance with Test Method C426.NOTE 4The pur
24、chaser 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 facing brick. The time ofdelivery to the purchaser is FOB plant when the purchaser or thepurchasers agent transports the concre
25、te facing brick, or at the timeunloaded at the worksite if the manufacturer or the manufacturers agenttransports the concrete facing brick.6. Dimensions, Mass, and Permissible Variations6.1 No overall dimension (width, height, and length) shalldiffer by more than 618 in. (3.2 mm) from the specifieds
26、tandard dimensions.NOTE 5Standard dimensions of concrete facing brick are the manu-facturers designated dimensions. Nominal dimensions of modular sizeconcrete facing brick are equal to the standard dimensions plus thethickness of one mortar joint. Nominal dimensions of nonmodular sizeconcrete facing
27、 brick usually exceed the standard dimensions by18 to14in. (3.2 to 6.4 mm).6.1.1 For those units with faces altered for aestheticpurposes, overall dimensional tolerances apply only to thosedimensions not affected by the altering.NOTE 6For such units, dimensions will vary. Consult with suppliersto de
28、termine achievable dimensional tolerances.6.2 For cored concrete facing brick, the net cross-sectionalarea in any plane parallel to the surface containing the coresshall be at least 75 % of the gross cross-sectional areameasured in the same plane. No part of any hole shall be lessthan34 in. (19.1 mm
29、) from any edge of the unit.7. Finish and Appearance7.1 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-tur
30、e or minor chipping resulting from customary methods ofhandling in shipment and delivery are not grounds for rejec-tion.7.2 Where units are to be used in exposed wall construc-tion, the faces shall not show chips or cracks not otherwisepermitted or other imperfections when viewed from a distanceof n
31、ot less than 20 ft (6.1 m) under diffused lighting.7.2.1 Five percent of a shipment containing chips, notlarger than12 in. (12.7 mm) in any dimension, or cracks notwider than 0.02 in. (0.5 mm) and not longer than 25 % of thenominal height of the unit, is permitted.7.3 The color and texture shall be
32、specified by the purchaser.The exposed faces shall conform to an approved sampleconsisting of not less than four units, representing the range oftexture and range of color permitted.8. Methods of Sampling and Testing8.1 The purchaser or authorized representative shall beaccorded proper facilities to
33、 inspect and sample the concretefacing brick at the place of manufacture from the lots ready fordelivery.8.2 Sample and test concrete facing brick in accordancewith Test Methods C140 and Test Method C426, when appli-cable.8.3 Total linear drying shrinkage shall be based on tests ofconcrete facing br
34、ick made with the same materials, concretemix design, manufacturing process, and curing method, con-ducted in accordance with Test Method C426 not more than 24months prior to delivery.TABLE 1 Strength, Absorption, and Density Classification RequirementsADensityClassificationOven-Dry Densityof Concre
35、te, lb/ft3(kg/m3)Maximum WaterAbsorption, lb/ft3(kg/m3)Minimum Net AreaCompressive Strength, lb/in2(MPa)Average of 3 Units Average of 3 Units Individual Units Average of 3 Units Individual UnitsLightweight Less than 105 (1680) 15 (240) 17 (272) 3500 (24.1) 3000 (20.7)Medium Weight 105 to less than 1
36、25 (16802000) 13 (208) 15 (240) 3500 (24.1) 3000 (20.7)Normal Weight 125 (2000) or more 10 (160) 12 (192) 3500 (24.1) 3000 (20.7)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.C1
37、634 1129. Compliance9.1 If a sample fails to conform to the specified physicalrequirements, the manufacturer shall be permitted to removeunits from the shipment. A new sample shall be selected by thepurchaser from remaining units from the shipment with asimilar configuration and dimension and tested
38、 at the expenseof the manufacturer. If the second sample meets the specifiedphysical requirements, the remaining portion of the shipmentrepresented by the sample meets the specified physical require-ments. If the second sample fails to meet the specified physicalrequirements, the remaining portion o
39、f the shipment repre-sented by the sample fails to meet the specified physicalrequirements.NOTE 7Unless otherwise specified in the purchase 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 specificat
40、ion, the costis typically borne by the seller; (2) if the results of the tests show that theunits conform to the specification requirements, the cost is typically borneby the purchaser.10. Keywords10.1 absorption; brick; compressive strength; concretebrick; concrete building brick; concrete facing b
41、rick; concretemasonry units; linear drying shrinkage; portland cementSUMMARY OF CHANGESCommittee C15 has identified the location of selected changes to this standard since the last issue(C1634 09) that may impact the use of this standard. (Approved June 1, 2011.)(1) Section 10 was revised.ASTM Inter
42、national takes no position respecting the validity 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
43、their own responsibility.This standard is subject 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 shou
44、ld be addressed to ASTM International Headquarters. 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 Stan
45、dards, at the address shown below.This standard is copyrighted 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).C1634 113
