1、Designation: C1634 15C1634 16Standard 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.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 Lightweight Aggregat
10、es 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 Use in Concrete and Mo
11、rtarsC1157 Performance Specification for Hydraulic CementC1232 Terminology of Masonry3. Terminology3.1 Terminology defined in Terminology C1232 shall apply for this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 concrete building brick, na concrete masonry unit, with a maximu
12、m 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.1 This specification is under the jurisdiction of ASTM Committee C15 on Manufactured Masonry Units and is the di
13、rect responsibility of Subcommittee C15.03 onConcrete Masonry Units and Related Units.Current edition approved Sept. 1, 2015Dec. 1, 2016. Published September 2015December 2016. Originally approved in 2006. Last previous edition approved in 20112015as C1634 11.C1634 15. DOI: 10.1520/C1634-15.10.1520/
14、C1634-16.2 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 website.This document is not an ASTM standard and is intende
15、d 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 prior editions as appropriate. In all cases only the current
16、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 19428-2959. United States13.2.2 concrete facing brick, na con
17、crete 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 Manufacture4.1 Cem
18、entitious 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 % CaCO3 content, is
19、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 CementsSpecification C595.4
20、.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 AggregatesSpecification
21、 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 applicable AST
22、Mstandards 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 requirements pres
23、cribed 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.5.1.1.1 When t
24、he 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 strength is 5000 ps
25、i 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 the three units
26、tested shall not exceed0.065 % when tested in accordance with Test8.3 Method C426.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 deliver
27、y 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 dim
28、ension (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 dimens
29、ions plus the thickness of one mortar joint. Nominal dimensions of nonmodular size concrete facing brickusually exceed the standard dimensions by 18 to 14 in. (3.2 to 6.4 mm).TABLE 1 Strength, Absorption, and Density Classification RequirementsADensityClassificationOven-Dry Densityof Concrete, lb/ft
30、3 (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 125 (16
31、802000) 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 tableCompressive strength, absorption, and density determined inaccordance with
32、 8.2to be classified as lightweight, medium weight, or normal weightC1634 1626.1.1 For those units with faces altered for aesthetic purposes, overall dimensional tolerances apply only to those dimensionsnot affected by the altering.NOTE 6For such units, dimensions will vary. Consult with suppliers t
33、o 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 cores 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.
34、(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 of the units orsignificantly impair the strength or permanence of the construction. Minor cracks incidental to the usual method of manu
35、factureor 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 exposed wall construction, the faces shall not show chips or cracks not otherwise permittedor other imperfections when viewed from a distance
36、 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 cracks 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 s
37、hall 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 and range of color permitted.8. Methods of Sampling and Testing8.1 The purchaser or authorized representative shall be accorded proper fa
38、cilities to inspect and sample the concrete facing brickat the place of manufacture from the lots ready for delivery.8.2 Compressive strength, absorption, density, and dimensional tolerances shall be based on tests of concrete facing brick of anyconfiguration or dimensions made with the same materia
39、ls, concrete mix design, manufacturing process, and curing method,conducted in accordance with Test Methods C140 and within 12 months of production of the units.8.3 Total linear drying shrinkage shall be based on tests of concrete facing brick of any configuration or dimensions made withthe same mat
40、erials, concrete mix design, manufacturing process, and curing method, conducted in accordance with Test MethodC426 and within 24 months of production of the units.9. Compliance9.1 If a sample fails to conform to the specified physical requirements, the manufacturer shall be permitted to remove unit
41、s fromthe shipment.Anew sample shall be selected by the purchaser from remaining units 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 repre
42、sented by the sample meets the specified physical requirements. If the second sample 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 ord
43、er, the costs of tests is typically borne as follows: (1) if the results of the tests 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,
44、the cost is typically borne by the purchaser.10. Keywords10.1 absorption; brick; compressive strength; concrete brick; concrete building brick; concrete facing brick; concrete masonryunits; linear drying shrinkage; portland cementC1634 163SUMMARY OF CHANGESCommittee C15 has identified the location o
45、f 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, 5.2, Table 1 were modified to clarify determining of compliance for physical properties.SUMMARY OF CHANGESCommittee C15 has identified the
46、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 month frequency for C140 tests.ASTM International takes no position respecting the validity of any patent rights asserted in
47、 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 revision at any time by the re
48、sponsible 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 caref
49、ul 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 multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-
