ASTM C1088-2009a Standard Specification for Thin Veneer Brick Units Made From Clay or Shale《粘土或泥板岩制薄陶面砖标准规范》.pdf
《ASTM C1088-2009a Standard Specification for Thin Veneer Brick Units Made From Clay or Shale《粘土或泥板岩制薄陶面砖标准规范》.pdf》由会员分享,可在线阅读,更多相关《ASTM C1088-2009a Standard Specification for Thin Veneer Brick Units Made From Clay or Shale《粘土或泥板岩制薄陶面砖标准规范》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C1088 09aStandard Specification forThin Veneer Brick Units Made From Clay or Shale1This standard is issued under the fixed designation C1088; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A
2、 number in parentheses 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 thin veneer brick units madefrom clay, shale, fire clay, sand, or mixtures thereof, and firedto incipient f
3、usion for use in adhered or fastened veneerapplications. Three types of thin veneer brick units in each oftwo grades are covered. In this specification, the term thinveneer brick shall be understood to mean clay masonry unitwith a maximum thickness of 134 in. (44.45 mm).NOTE 1Brick intended for pavi
4、ng should be specified under Specifi-cation C902.1.2 The property requirements of this specification apply atthe time of purchase. The use of results from testing of brickextracted from masonry structures for determining conform-ance or nonconformance to the property requirements (Section5) of this
5、specification is beyond the scope of this specification.1.3 Brick covered by this specification are manufacturedfrom clay, shale, or similar naturally occurring substances andsubjected to a heat treatment at elevated temperatures (firing).The heat treatment must develop sufficient fired bond between
6、the particulate constituents to provide the strength and dura-bility requirements of the specification. (See “firing” and “firedbond” in Terminology C1232.)1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units
7、 that are provided for information onlyand are not considered standard.1.5 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.2. Refer
8、enced Documents2.1 ASTM Standards:2C67 Test Methods for Sampling and Testing Brick andStructural Clay TileC902 Specification for Pedestrian and Light Traffic PavingBrickC1232 Terminology of MasonryE835/E835M Guide for Modular Coordination of Clay andConcrete Masonry Units3. Grades3.1 Two grades of t
9、hin veneer brick units are covered forexposure conditions to weather and are defined in Table 1 asInterior and Exterior.4. Types4.1 Three types of thin veneer brick units are covered asfollows:4.1.1 Type TBS (Standard)Thin veneer brick for generaluse in masonry.4.1.2 Type TBX (Select)Thin veneer bri
10、ck for general usein masonry where a higher degree of precision and lowerpermissible variation in size than permitted for Type TBS isrequired.4.1.3 Type TBA (Architectural)Thin veneer brick for gen-eral use in masonry selected to produce characteristic architec-tural effects resulting from nonunifor
11、mity in size and texture ofthe individual units.4.2 When the type is not specified, the requirements forType TBS will govern.5. Physical Properties5.1 DurabilityThe thin veneer brick shall conform to thephysical requirements in Table 1 for the grade specified. Whenthe grade is not specified, the req
12、uirements for Grade Exteriorshall govern. If the water absorption of each unit is less than8.0 % after submersion in cold water for 24 h, the requirementsfor saturation coefficient shall be waived. If exterior or interiorgrade thin veneer brick are intended for use on interiors only,the requirements
13、 for water absorption (5-h boiling) and forsaturation coefficient for interior grade in Table 1 shall govern.NOTE 2Aminimum compressive strength requirement is not includedin combination with other physical property requirements as an indicatorof freeze/thaw durability. The geometry of the thin bric
14、k units maypreclude proper testing and can affect the failure mode attained. Thus,1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibility of SubcommitteeC15.02 on Brick and Structural Clay Tile.Current edition approved Dec. 1,
15、 2009. Published December 2009. Originallyapproved in 1988. Last previous edition approved in 2009 as C1088 09. DOI:10.1520/C1088-09.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume infor
16、mation, 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, United Spressive strength test results may not be a true indi
17、cator of unitfreeze-thaw performance or fired bond.5.2 Freezing and ThawingThe requirements specified in5.1 for water absorption (5-h boiling) and saturation coefficientshall be waived provided a sample of 5 typical exterior gradethin veneer brick, meeting all other requirements, complieswith the fo
18、llowing requirements when subjected to 50 cycles ofthe freezing-and-thawing test:5.2.1 Grade Exterior: Breakage and Weight LossRequirementNo individual unit separates or disintegratesresulting in a weight loss greater than 0.5 % of its original dryweight.5.2.2 Grade Exterior: Cracking RequirementNo
19、indi-vidual unit develops a crack that exceeds, in length, the unitsleast face dimension.5.3 Low Weathering Index AlternativeIf the thin brick areintended for use exposed to weather where the weatheringindex is less than 50 (see Fig. 1), and unless otherwisespecified, the requirements given in Table
20、 1 for grade interiorshall apply.NOTE 3The effect of weathering on thin brick is related to theweathering index, which for any locality is the product of the averageannual number of freezing cycle days and the average annual winterrainfall in inches (millimetres), defined as follows.A freezing cycle
21、 day is any day during which the air temperature passeseither above or below 32F (0C). The average number of freezing cycledays in a year may be taken to equal the difference between the meannumber of days during which the minimum temperature was 32F (0C)or below, and the mean number of days during
22、which the maximumtemperature was 32F (0C) or below.Winter rainfall is the sum in inches (millimetres) of the mean monthlycorrected precipitation (rainfall) occurring during the period between andincluding the normal date of the first killing frost in the fall and the normaldate of the last killing f
23、rost in the spring. The winter rainfall for any periodis equal to the total precipitation less one tenth of the total fall of snow,TABLE 1 Physical RequirementsDesignationMaximum WaterAbsorption by 5-hBoiling, %MaximumSaturationCoefficientAAverageof 5 unitsIndividualAverageof 5 unitsIndividualGrade
24、Exterior 17.0 20.0 0.78 0.80Grade Interior 22.0 25.0 0.88 0.90AThe saturation coefficient is the ratio of absorption by 24-h submersion in coldwater to that after 5-h submersion in boiling water.Grade Recommendations for Face ExposuresExposureWeathering Index (Note 3)Lessthan 5050 andgreaterIn verti
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