1、Designation:C27917Standard Specification forChemical-Resistant Masonry Units1This standard is issued under the fixed designation C279;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 i
2、ndicates 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,kiln fired brick and tilemade from clay,shale,or mixtures thereof,suitable for indoorand outdoor use in masonry construction subj
3、ected to chemicalenvironments(see Terminology C1232).1.2 The brick and tile covered herein are intended for use inchemical environments where resistance to thermal shock maybe a consideration.The brick and tile are normally used withchemical-resistant mortars.1.3 The values stated in inch-pound unit
4、s are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility
5、 of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the D
6、ecision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C20 Test Methods for Apparent Porosity,Water Absorption,Apparent Specific Gravity,
7、and Bulk Density of BurnedRefractory Brick and Shapes by Boiling WaterC67 Test Methods for Sampling and Testing Brick andStructural Clay TileC1232 Terminology of MasonryE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 DefinitionsFor definitions relating to chemical-re
8、sistant masonry units,refer to Terminology C1232.4.Classification4.1 The physical and chemical properties of brick and tilediffer from supplier to supplier,mainly because their compo-sition is determined by the source of raw materials.Regardlessof the differences,brick and tile are considered to be
9、one ofthree types and one of two classes as follows:4.1.1 Type IFor use where low absorption and high acidresistance are not major factors.4.1.2 Type IIFor use where lower absorption and higheracid resistance are required.4.1.3 Type IIIFor use where minimum absorption andmaximum acid resistance are
10、required.NOTE1Types I,II,and III may not differ significantly in thermalshock resistance.The suitability of a given brick,for a particularapplication should be determined at the time of purchase by agreementbetween the purchaser and the supplier.NOTE2Types I and III were formerly designated Type“H”a
11、nd“L”respectively.4.1.4 Class SFor use in standard applications.4.1.5 Class XFor use where a higher degree of precisionand lower permissible variation in size than that permitted forClass S is required.5.Physical Properties5.1 StrengthThe brick and tile when tested in accordancewith Test Methods C67
12、 shall conform to the requirements formodulus of rupture(flexural strength)for the type specified,asprescribed in Table 1.5.2 Water AbsorptionThe brick and tile when tested inaccordance with Test Methods C20 shall conform to therequirements for water absorption(based on the 2 h boil)forthe type spec
13、ified,as prescribed in Table 1.6.Dimensions and Permissible Variations6.1 SizesThe sizes of the brick and tile shall be asspecified by the purchaser.The length,width,and depth1This specification is under the jurisdiction of ASTM Committee C15 onManufactured Masonry Units and is the direct responsibi
14、lity of SubcommitteeC15.02 on Brick and Structural Clay Tile.Current edition approved June 1,2017.Published July 2017.Originally approvedin 1951.Last previous edition approved in 2013 as C279 13a.DOI:10.1520/C0279-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM C
15、ustomer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document 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
16、19428-2959.United StatesThis international standard was developed in accordance with internationally recognized 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.1 measurements of the brick or tile shall be within 63%of thespecified dimensions for Class S units and within 61.5%ofthe specified dimensions for Class X units.6
