1、Designation: C1634 16C1634 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 parenthe
2、ses indicates 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 facing brick intended for interior and exterior use in constructing structuraland facing masonry com
3、ponents and are made from portland cement, water, and suitable mineral aggregates with or without theinclusion of other materials.NOTE 1Specification C55 addresses concrete building brick used in non-facing, utilitarian applications (previously referred to in earlier editions ofSpecification C55 as
4、Grade Sfor general use where moderate strength and resistance to frost action and moisture penetration are required). Thisspecification differs from Specification C55 in that it includes expanded consideration for properties of concrete brick used in facing applications and otherexposures (previousl
5、y referred to in earlier editions of Specification C55 as Grade Nfor use as architectural veneer and facing units in exterior wallsand for use where high strength and resistance to moisture penetration and severe frost action are desired).1.2 The text of this specification references notes and footn
6、otes which provide explanatory material. These notes and footnotes(excluding those in tables and figures) shall not be considered as requirements of the standard.1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematicalconversions to S
7、I units that are provided for information only and are not considered standard.NOTE 2Concrete facing brick covered by this specification are made from lightweight or normal weight aggregates, or both.NOTE 3When particular features are desired, such as density classification, high compressive strengt
8、h, surface textures for appearance or bond, finish,color, fire resistance, insulation, acoustical properties, or other special features, such properties should be specified separately by the purchaser. Suppliersshould be consulted as to the availability of concrete facing brick having the desired fe
9、atures.1.4 This international standard 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 Barrier
10、s to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C33 Specification for Concrete AggregatesC55 Specification for Concrete Building BrickC140 Test Methods for Sampling and Testing Concrete Masonry Units and Related UnitsC150 Specification for Portland CementC331 Specification for
11、Lightweight Aggregates for Concrete Masonry UnitsC426 Test Method for Linear Drying Shrinkage of Concrete Masonry UnitsC595 Specification for Blended Hydraulic CementsC618 Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in ConcreteC989 Specification for Slag Cement for Us
12、e in Concrete and MortarsC1157 Performance Specification for Hydraulic CementC1232 Terminology for Masonry3. Terminology3.1 Terminology defined in Terminology C1232 shall apply for this specification.3.2 Definitions of Terms Specific to This Standard:1 This specification is under the jurisdiction of
13、 ASTM Committee C15 on Manufactured Masonry Units and is the direct responsibility of Subcommittee C15.03 onConcrete Masonry Units and Related Units.Current edition approved Dec. 1, 2016June 1, 2017. Published December 2016July 2017. Originally approved in 2006. Last previous edition approved in 201
14、52016 asC1634 15.C1634 16. DOI: 10.1520/C1634-16.10.1520/C1634-17.2 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 web
15、site.This document is not an ASTM standard 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 prio
16、r editions as appropriate. In all cases only 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 1942
17、8-2959. United States13.2.1 concrete building brick, na concrete masonry unit, with a maximum width of four (4) inches and of a weight that willtypically permit it to be lifted and placed with one hand, that is manufactured for general use in non-facing, utilitarian applications.3.2.2 concrete facin
18、g brick, na concrete masonry unit, with a maximum width of four (4) inches and of a weight that willtypically permit it to be lifted and placed with one hand, that is manufactured to be typically used in an application where one ormore faces of the unit is intended to be exposed.4. Materials and Man
19、ufacture4.1 Cementitious MaterialsMaterials shall conform to the following applicable specifications:4.1.1 Portland CementSpecification C150.4.1.2 Modified Portland CementPortland cement conforming to Specification C150, modified as follows:4.1.2.1 LimestoneCalcium carbonate, with a minimum 85 % CaC
20、O3 content, is permitted to be added to the cement, providedthese requirements of Specification C150 as modified 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 CementsSpeci
21、fication 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 following specifications, except that grading requirements shall notnecessarily apply:4.2.1 Normal Weight Aggregat
22、esSpecification C33.4.2.2 Lightweight AggregatesSpecification C331.4.3 Other ConstituentsAir-entraining agents, coloring pigments, integral water repellents, finely ground silica, and otherconstituents shall be previously established as suitable for use in concrete masonry units and shall conform to
23、 applicable ASTMstandards or shall be shown by test or experience not to be detrimental to the durability of the concrete masonry units or anymaterial customarily used in masonry construction.5. Physical Requirements5.1 At the time of delivery to the purchaser, units shall conform to the physical re
24、quirements prescribed in Table 1.5.1.1 When higher compressive strengths than those listed in Table 1 are specified, the tested average net area compressivestrength of three units shall equal or exceed the specified compressive strength, and the following single unit strength requirementsshall apply
25、.5.1.1.1 When the specified compressive strength is less than 5000 psi, no single unit net area compressive strength test resultshall be less than the specified compressive strength minus 500 psi. Compressive strength shall be tested in accordance with 8.2.5.1.1.2 When the specified compressive stre
26、ngth is 5000 psi or greater, no single unit net area compressive strength test resultshall be less than 90 % of the specified compressive strength. Compressive strength shall be tested in accordance with 8.2.5.2 At the time of delivery to the purchaser, the average total linear drying shrinkage of t
27、he three units tested shall not exceed0.065 % 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 or agreement topurchase or install, or both, concrete facing brick. The time of delivery
28、 to the purchaser is FOB plant when the purchaser or the purchasers agenttransports the concrete facing brick, or at the time unloaded at the worksite if the manufacturer or the manufacturers agent transports the concrete facingbrick.6. Dimensions, Mass, and Permissible Variations6.1 No overall dime
29、nsion (width, height, and length) shall differ by more than 618 in. (3.2 mm) from the specified standarddimensions.NOTE 5Standard dimensions of concrete facing brick are the manufacturers designated dimensions. Nominal dimensions of modular size concretefacing brick are equal to the standard dimensi
30、ons plus the thickness of one mortar joint. Nominal dimensions of nonmodular size concrete facing brickTABLE 1 Strength, Absorption, and Density Classification RequirementsADensityClassificationOven-Dry Densityof Concrete, lb/ft3 (kg m3)Maximum WaterAbsorption, lb/ft3 (kg m3)Minimum Net AreaCompress
31、ive 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 125 (16802000) 13 (208) 15 (240) 3500 (24.1) 3000 (20.7)Normal Weight 125 (2000
32、) or more 10 (160) 12 (192) 3500 (24.1) 3000 (20.7)ACompressive strength, absorption, and density determined in accordance with 8.2.C1634 172usually exceed the standard dimensions by 18 to 14 in. (3.2 to 6.4 mm).6.1.1 For those units with faces altered for aesthetic purposes, overall dimensional tol
33、erances apply only to those dimensionsnot affected by the altering.NOTE 6For such units, dimensions will vary. Consult with suppliers to determine achievable dimensional tolerances.6.2 For cored concrete facing brick, the net cross-sectional area in any plane parallel to the surface containing the c
34、ores shallbe at least 75 % of the gross cross-sectional area measured in the same plane. No part of any hole shall be less than 34 in. (19.1mm) from any edge of the unit.7. Finish and Appearance7.1 All units shall be sound and free of cracks or other defects that interfere with the proper placement
35、of the units orsignificantly impair the strength or permanence of the construction. Minor cracks incidental to the usual method of manufactureor minor chipping resulting from customary methods of handling in shipment and delivery are not grounds for rejection.7.2 Where units are to be used in expose
36、d wall construction, the faces shall not show chips or cracks not otherwise permittedor other imperfections when viewed from a distance of not less than 20 ft (6.1 m) under diffused lighting.7.2.1 Five percent of a shipment containing chips, not larger than 12 in. (12.7 mm) in any dimension, or crac
37、ks not wider than0.02 in. (0.5 mm) and not longer than 25 % of the nominal height 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 sample consistingof not less than four units, representing the range of texture an
38、d range of color permitted.8. Methods of Sampling and Testing8.1 The purchaser or authorized representative shall be accorded proper facilities to inspect and sample the concrete facing brickat the place of manufacture from the lots ready for delivery.8.2 Compressive strength, absorption, density, a
39、nd dimensional tolerances shall be based on tests of concrete facing brick of anyconfiguration or dimensions made with the same materials, concrete mix design, manufacturing process, and curing method,conducted in accordance with Test Methods C140 and within 12 months of production of the units.not
40、more than 12 months priorto delivery.8.3 Total linear drying shrinkage shall be based on tests of concrete facing brick of any configuration or dimensions made withthe same materials, concrete mix design, manufacturing process, and curing method, conducted in accordance with Test MethodC426 and with
41、in 24 months of production of the units.not more than 24 months prior to delivery.9. Compliance9.1 If a sample fails to conform to the specified physical requirements, the manufacturer shall be permitted to remove units fromthe shipment.Anew sample shall be selected by the purchaser from remaining u
42、nits from the shipment with a similar configurationand dimension and tested at the expense of the manufacturer. If the second sample meets the specified physical requirements, theremaining portion of the shipment represented by the sample meets the specified physical requirements. If the second samp
43、le failsto meet the specified physical requirements, the remaining portion of the shipment represented by the sample fails to meet thespecified physical requirements.NOTE 7Unless otherwise specified in the purchase order, the costs of tests is typically borne as follows: (1) if the results of the te
44、sts show that theunits do not conform to the requirements of this specification, the cost is typically borne by the seller; (2) if the results of the tests show that the unitsconform to the specification requirements, the cost is typically borne by the purchaser.10. Keywords10.1 absorption; brick; c
45、ompressive strength; concrete brick; concrete building brick; concrete facing brick; concrete masonryunits; linear drying shrinkage; portland cementC1634 173SUMMARY OF CHANGESCommittee C15 has identified the location of selected changes to this standard since the last issue(C1634 16) that may impact
46、 the use of this standard. (June 1, 2017)(1) Modified testing frequency in Section 8 to be based on time of delivery.SUMMARY OF CHANGESCommittee 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,
47、2016)(1) Subsections 5.1.1.1, 5.1.1.2, 5.2, Table 1 were modified to clarify 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
48、) Section 8 was revised to add a 12 month frequency for C140 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
49、such patent rights, and the riskof infringement 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 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 m
