ASTM_C_1325_-_17a.pdf

Designation:C132517aStandard Specification forNon-Asbestos Fiber-Mat Reinforced Cementitious BackerUnits1This standard is issued under the fixed designation C1325;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 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 non-asbestos fiber-mat rein-forced cementitious backer units manufactured to be dimen-sionally stable and suitable as either an unfinished substrate(see Note 1)or as a substrate for decoration such as naturalstone or tile on walls,floors,or decks in wet and dry areas.Itis also suitable to be used as a substrate in the Application ofClass PB Exterior Insulation Finish Systems(Practice C1397),the Application of Direct-Applied Finish Systems(PracticeC1516),and the Application of Exterior Insulation FinishSystems Class PI(Practice C1535).NOTE1When used as an unfinished substrate,consult the manufac-turers written installation literature for proper application details.1.2 This specification is not applicable to asbestos-cementflat sheets(Specification C220);non-asbestos fiber cement flatsheets for exterior applications such as claddings,facades,curtain walls,and soffits(Specification C1186);gypsum back-ing board,coreboard,and shaftliner(Specification C1396/C1396M);water-resistant gypsum backing board(Specifica-tion C1396/C1396M);glass mat gypsum backing board(Specification C1178/C1178M);particle boards(DefinitionsD1554);and discrete non-asbestos fiber cement interior sub-strate sheets(Specification C1288).1.3 UnitsThe values stated in inch-pound units are to beregarded as standard.The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.4 This international 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)Committee.2.Referenced Documents2.1 ASTM Standards:2C220 Specification for Flat Asbestos-Cement SheetsC473 Test Methods for Physical Testing of Gypsum PanelProductsC666/C666M Test Method for Resistance of Concrete toRapid Freezing and ThawingC947 Test Method for Flexural Properties of Thin-SectionGlass-Fiber-Reinforced Concrete(Using Simple BeamWith Third-Point Loading)C1154 Terminology for Non-Asbestos Fiber-Reinforced Ce-ment ProductsC1178/C1178M Specification for Coated Glass Mat Water-Resistant Gypsum Backing PanelC1185 Test Methods for Sampling and Testing Non-Asbestos Fiber-Cement Flat Sheet,Roofing and SidingShingles,and ClapboardsC1186 Specification for Flat Fiber-Cement SheetsC1288 Specification for Discrete Non-Asbestos Fiber-Cement Interior Substrate SheetsC1396/C1396M Specification for Gypsum BoardC1397 Practice for Application of Class PB Exterior Insula-tion and Finish Systems(EIFS)and EIFS with DrainageC1516 Practice for Application of Direct-Applied ExteriorFinish SystemsC1535 Practice for Application of Exterior Insulation andFinish Systems Class PID1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel MaterialsD1554 Terminology Relating to Wood-Base Fiber and Par-ticle Panel MaterialsD2394 Test Methods for Simulated Service Testing of Woodand Wood-Base Finish FlooringE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsG21 Practice for Determining Resistance of Synthetic Poly-meric Materials to Fungi1This specification is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Productsand is the direct responsibility of SubcommitteeC17.01 on Non-Asbestos Fiber-Mat Reinforced Products.Current edition approved June 1,2017.Published July 2017.Originally approvedin 1996.Last previous edition approved in 2017 as C1325-17.DOI:10.1520/C1325-17A.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 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 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 G22 Practice for Determining Resistance of Plastics toBacteria(Withdrawn 2002)32.2 ANSI Standards:4A118.1 American National Standard Specification for Dry-Set Cement MortarA118.4 America