1、Designation: C1634 17Standard 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 densityclassification, high compressive strength, surface textures f
8、or appearanceor bond, 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.1.4 This interna
9、tional standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Com
10、mittee.2. Referenced 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 Aggregate
11、s for ConcreteMasonry 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 Concrete andMortars
12、C1157 Performance Specification 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
13、 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, utilitarianapplications.3.2.2 concrete facing brick, na concrete masonry unit,with a maximum width of four (4) inches and of a weight thatwill ty
14、pically 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 intended to be exposed.4. Materials and Manufacture4.1 Cementitious MaterialsMaterials shall conform to thefollowing applicable specifications:4.1
15、.1 Portland CementSpecification C150.1This 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 June 1, 2017. Published July 2017. Origina
16、lly approvedin 2006. Last previous edition approved in 2016 as C1634 16. DOI: 10.1520/C1634-17.2For 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 Documen
17、t Summary 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 StatesThis international standard was developed in accordance with internationally recognized
18、principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1Mon Apr 30 38 4.1.2 Modified Portland CementPortland cement con-formin
19、g 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) Limitation on Insoluble Residue1.5 %.(2) Limitation on Air Content of Mort
20、arVolume percent,22 % max.(3) Limitation on Loss on Ignition7%.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 followingspecif
21、ications, except that grading requirements shall 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 s
22、hall 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 durability of the concrete masonry unitsor any material customarily used in masonry construction.5. Physical R
23、equirements5.1 At the time of delivery to the purchaser, 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
24、 specifiedcompressive strength, and the following 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. Compressive
25、 strength shall be tested in accor-dance with 8.2.5.1.1.2 When the specified compressive strength is 5000 psior greater, no single unit net area compressive strength testresult shall be less than 90 % of the specified compressivestrength. Compressive strength shall be tested in accordancewith 8.2.5.
26、2 At the time of delivery to the purchaser, the averagetotal linear drying shrinkage of the three units tested shall notexceed 0.065 % when tested in accordance with 8.3.NOTE 4The purchaser is the public body or authority, association,corporation, partnership, or individual entering into a contract
27、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 concrete facing brick, or at the timeunloaded at the worksite if the manufacturer or the manufacturers agenttransports the
28、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 specifiedstandard dimensions.NOTE 5Standard dimensions of concrete facing brick are the manu-facturers designated dimensions. N
29、ominal dimensions of modular sizeconcrete facing brick are equal to the standard dimensions plus thethickness of one mortar joint. Nominal dimensions of nonmodular sizeconcrete facing brick usually exceed the standard dimensions by18 to14in. (3.2 to 6.4 mm).6.1.1 For those units with faces altered f
30、or aestheticpurposes, overall dimensional tolerances apply only to thosedimensions not affected by the altering.NOTE 6For such units, dimensions will vary. Consult with suppliers todetermine achievable dimensional tolerances.6.2 For cored concrete facing brick, the net cross-sectionalarea in any pla
31、ne 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) from any edge of the unit.7. Finish and Appearance7.1 All units shall be sound and free of cracks or otherdefects t
32、hat 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 ofhandling in shipment and delivery are not grounds for rejec-ti
33、on.7.2 Where units are to be used in exposed wall construction,the faces shall not show chips or cracks not otherwisepermitted or other imperfections when viewed from a distanceof not less than 20 ft (6.1 m) under diffused lighting.7.2.1 Five percent of a shipment containing chips, not largerthan12
34、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.7.3 The color and texture shall be specified by the purchaser.The exposed faces shall conform to an approved sampleconsisting of not less than four units,
35、 representing the range oftexture and range of color permitted.TABLE 1 Strength, Absorption, and Density Classification RequirementsADensityClassificationOven-Dry Densityof Concrete, lb/ft3(kg m3)Maximum WaterAbsorption, lb/ft3(kg m3)Minimum Net AreaCompressive Strength, lb/in2(MPa)Average of 3 Unit
36、s 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 125 (16802000) 13 (208) 15 (240) 3500 (24.1) 3000 (20.7)Normal Weight 125 (2000) or more 10 (160) 12 (192) 3500 (24.1) 300
37、0 (20.7)ACompressive strength, absorption, and density determined in accordance with 8.2.C1634 172Mon Apr 30 38 8. Methods of Sampling and Testing8.1 The purchaser or authorized representative shall beaccorded proper facilities to inspect and sample the concretefacing brick at the place of manufactu
38、re from the lots ready fordelivery.8.2 Compressive strength, absorption, density, and dimen-sional tolerances shall be based on tests of concrete facingbrick of any configuration or dimensions made with the samematerials, concrete mix design, manufacturing process, andcuring method, conducted in acc
39、ordance with Test MethodsC140 and not more than 12 months prior to delivery.8.3 Total linear drying shrinkage shall be based on tests ofconcrete facing brick of any configuration or dimensions madewith the same materials, concrete mix design, manufacturingprocess, and curing method, conducted in acc
40、ordance with TestMethod C426 and not more than 24 months prior to delivery.9. 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 fr
41、om the shipment with asimilar configuration and dimension and tested 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
42、 to meet the specified physicalrequirements, the remaining portion of 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
43、 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 requirements, the cost is typically borneby the purchaser.10. Keywords10.1 absorption; brick; compressive
44、 strength; concretebrick; concrete building brick; concrete facing brick; 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 16) that may impact the use of this sta
45、ndard. (June 1, 2017)(1) Modified testing frequency in Section 8 to be based on timeof delivery.Committee C15 has identified the location of selected changes to this standard since the last issue(C1634 15) that may impact the use of this standard. (December 1, 2016)(1) Subsections 5.1.1.1, 5.1.1.2,
46、5.2, Table 1 were modified toclarify determining of compliance for physical properties.Committee C15 has identified the location of selected changes to this standard since the last issue (C1634 11)that may impact the use of this standard. (September 1, 2015)(1) Section 8 was revised to add a 12 mont
47、h frequency forC140 tests.ASTM International 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 infrin
48、gement of such rights, are entirely 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
49、 or for additional standardsand should 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 Standards, 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
