1、Designation: C1325 18Standard Specification forFiber-Mat Reinforced Cementitious Backer Units1This 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 n
2、umber 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 sui
3、table 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 Applic
4、ation of Direct-Applied Finish Systems (PracticeC1516), and the Application of Exterior Insulation FinishSystems Class PI (Practice C1535).NOTE 1When used as an unfinished substrate, consult the manufac-turers written installation literature for proper application details.1.2 This specification is n
5、ot 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
6、 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 beregarde
7、d 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
8、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 Physi
9、cal 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-m
10、ent 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 Fiber-Ce
11、ment Interior SubstrateSheetsC1396/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 In
12、sulation 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-Based Finish FlooringE84 Test Met
13、hod for Surface Burning Characteristics ofBuilding Materials1This specification is under the jurisdiction of ASTM Committee C17 onFiber-Reinforced Cement Products and is the direct responsibility of SubcommitteeC17.01 on Non-Asbestos Fiber-Mat Reinforced Products.Current edition approved July 1, 201
14、8. Published August 2018. Originallyapproved in 1996. Last previous edition approved in 2017 as C1325 - 17a. DOI:10.1520/C1325-18.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume informat
15、ion, 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 accordan
16、ce 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.1G21 Practice for Determining Resist
17、ance of Synthetic Poly-meric Materials to FungiG22 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 American National Standard Specification for Modi-fied Dry-Set Cement Mor
18、tarA136.1 Standard for Organic Adhesives for Installation ofCeramic Tile3. Terminology3.1 DefinitionsRefer to Terminology C1154.4. Classification4.1 Flat sheets covered by this specification are divided intotwo types, according to their intended application.4.1.1 Type ASheets are intended for exteri
19、or applicationsas a substrate for other cladding materials, or as an unfinishedsubstrate for decoration such as natural stone, tile, or coatings.Type A products are also suitable for interior use.4.1.2 Type BSheets are intended for covered exteriorapplications such as soffit areas, or for interior d
20、ry or wet areaapplications as a desired unfinished substrate or an unfinishedsubstrate for decoration such as natural stone or tile, wheresubstrate dimensional stability is required.NOTE 2Flat sheets may be supplied coated or uncoated.5. Composition and Manufacture5.1 CompositionThis specification i
21、s applicable to non-asbestos fiber-mat reinforced cementitious backer units con-sisting essentially of an inorganic hydraulic binder or a calciumsilicate binder formed by the chemical reaction of a siliceousmaterial and a calcareous material, reinforced by fiber-matmade of organic fibers, inorganic
22、non-asbestos fibers, or both.NOTE 3Process aids, fillers, pigments, and other fibers that arecompatible with the fiber-mat cement may be added.5.2 ManufactureThese products are formed either with orwithout pressure and cured, either under natural or acceleratedconditions, to meet the property requir
23、ements of this specifi-cation.6. Mechanical and Physical Properties6.1 Mechanical and physical properties shall be determinedon an uncoated product wherever practical. Where the productsare supplied coated, this material shall also be tested with theresults identified as applying to coated material.
24、6.2 SamplingObtain five samples of the particular cementsubstrate sheet to be tested from a commercial lot of not lessthan 50 000 ft2to conduct the tests described in this specifi-cation.6.3 Mechanical Properties:6.3.1 Flexural StrengthWhen tested in accordance withTest Method C947, flexural strengt
25、h shall be not less than 750psi (5170 kPa).6.3.2 Sheets shall be tested and specified in both the wet andequilibrium conditions and shall meet the minimum wet andminimum equilibrium flexural strength requirements.NOTE 4When sampled from continuous production, these tests maybe conducted on dry, equi
26、librium, or saturated specimens, provided arelationship can be established between this testing and the specifiedvalues.6.4 Physical Properties:6.4.1 DensityNominal values and tolerances for densityshall be stated by the manufacturer for each of the products.When tested in accordance with the test m
27、ethod specified inTest Methods C1185, the value for the density shall complywith the value stated by the manufacturer.6.4.2 Modulus of ElasticityValues for the modulus ofelasticity shall be stated by the manufacturer for each of theproducts. When tested in accordance with Test Method C947,the value
28、for modulus of elasticity shall comply with the valuestated by the manufacturer. Calculate the modulus of elasticityfor each sample specimen by the following equation:E 5 5P22 P1!3 L3/27bd3y22 y1!(1)where:E = modulus of elasticity, psi (MPa),P2and P1= loads, lb (N), taken from two points within thel
29、inear section of the plot,y2and y1= deflections, in. (mm) corresponding to the loadsselected,b = width of specimen, in. (mm),d = thickness of specimen, in. (mm), andL = span, in. (mm).7. Dimensions and Tolerances7.1 Method of MeasurementThe method of measurementfor 7.1.1 7.1.5 shall be in accordance
30、 with Test MethodsC473.7.1.1 Nominal Length and WidthFiber-mat reinforced ce-mentitious backer units are typically supplied in nominallengths of 48 in. (1219 mm) to 96 in. (2438 mm) and nominalwidths of 32 in. (810 mm) to 48 in. (1219 mm). Lengths andwidths other than stated above are not prohibited
31、 from beingsupplied.7.1.2 Nominal ThicknessFiber-mat reinforced cementi-tious backer units are typically supplied in nominal thicknessesof14 in. (6 mm) to58 in. (16 mm). Thicknesses other thanstated above are not prohibited from being supplied.7.1.3 Length and Width ToleranceThe tolerance from theno
32、minal value shall be 618 in. (3 mm).7.1.4 Thickness ToleranceThe maximum difference be-tween extreme values of the thickness measurement within asheet shall not exceed 0.03 in. (0.8 mm). Thickness variationfrom sheet to sheet shall not exceed 0.03 in. (0.8 mm).7.1.5 Squareness ToleranceThe length of
33、 the diagonalsshall not vary by more than132 in./ft (2.6 mm/m) of the lengthof the sheets. Opposite sides of the sheet shall not vary inlength by more than132 in./ft (2.6 mm/m).3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American National Stand
34、ards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.C1325 1827.2 Edge Straightness ToleranceThe sheet edges shall bestraight within132 in./ft (2.6 mm/m) of length or width whentested in accordance with Test Methods C1185.8. Workmanship8.1 WorkmanshipSheets shall b
35、e free of defects that willimpair erection, use, or serviceability.9. Inspection and Acceptance9.1 Inspection of material, if required, shall be at the pointof shipment. The inspector representing the purchaser shallhave authorized access to the carriers being loaded for ship-ment to the purchaser.
36、The purchaser shall be afforded allreasonable and available facilities at the point of shipment forsampling and inspection of the material, which shall beconducted so as not to interfere unnecessarily with the loadingof the carriers.9.2 Third party certification, either continuous or at regularinter
37、vals, shall be recognized as an alternative to lot inspection.9.3 Failure to conform to any one of the requirements of thisspecification shall constitute grounds for nonacceptance.10. Product Marking10.1 IdentificationProduct marking shall includetrademark, type of product (A or B), or other means o
38、fidentification that ensures that the manufacturer and producttype can be identified. The method of marking shall be statedin the manufacturers catalog.11. Packaging and Storage11.1 Commercial PackagingFlat sheets shall be packagedso as to prevent damage during shipment.11.2 StorageFlat sheets shall
39、 be stacked on supports thatwill keep the sheets level and flat. The sheets shall be stackedwith the edges square and flush and covered to provideprotection from the weather until used.12. Keywords12.1 acceptance; air cured; appearance; density; edgestraightness; finish; flexural strength; glass mat
40、 cement sheet;inspection; interior wet area application; length and widthtolerance; mechanical properties; minimum equilibriumstrength; minimum wet strength; moisture content; moisturemovement; nominal length; nominal thickness; nominal width;non-asbestos fiber-mat; packaging; physical properties; p
41、res-sure cured; sampling; shipping; squareness tolerance; storage;supplementary requirements; supplementary tests; surfaceburning characteristics; thickness requirements; thickness tol-erance; third party certification; tolerance; type tests; warmwater resistance; workmanshipSUPPLEMENTARY REQUIREMEN
42、TSS1. Supplementary TestsS1.1 Supplementary tests for fiber-mat reinforced cementi-tious backer units shall consist of once only supplementarytest, with the manufacturers statement of results providedupon customers request. Fundamental changes in formulationor methods of manufacture, or both, shall
43、require the subse-quent retesting of the supplementary tests.S1.2 Supplementary tests shall be determined on uncoatedproduct wherever practical. Where fiber-mat reinforced cemen-titious backer units are supplied coated, this material shall alsobe tested with the results identified as applying to coa
44、tedmaterial.S1.3 The following supplementary tests shall be required:Moisture ContentMoisture MovementWarm Water ResistanceSurface Burning CharacteristicsShear Bond Strength (Dry-Set Portland Cement Mortar)Shear Bond Strength (Latex-Portland Cement Mortar)Shear Bond Strength (Organic Adhesive Type 1
45、)Nail-Head Pull-Through (roofing nail)Modulus of ElasticityMold ResistanceCompression IndentationFalling Ball ImpactBacteria ResistanceFreeze Thaw ResistanceS1.3.1 Moisture ContentState the percentage of moisturecontent of the fiber-mat reinforced cementitious backer unitswhen conditioned at 50 6 5
46、% relative humidity and atemperature of 73 6 4F (23 6 2C) in accordance with TestMethod C1185.S1.3.2 Moisture MovementThe linear variation withchange in moisture content shall be stated as the percentagechange in length based on a relative humidity change from 30% to 90 % in accordance with Test Met
47、hod D1037. The linearvariation with change shall be less than or equal to 0.07 %. Forthe purpose of this test, obtain 5 samples of the particularcement substrate sheet to be tested from a commercial lot ofnot less than 50 000 ft2.S1.3.3 Warm Water ResistanceThe specimens, whentested in accordance wi
48、th Test Method C1185, shall not showvisible cracks or structural alteration such as to affect theirperformance in use. The average flexural strength of thespecimens soaked in warm water shall be not less than 70 % ofthe 750 psi flexural strength requirement from 6.3.1, that is, theaverage warm water
49、 flexural strength shall be not less than 525psi.S1.3.4 Surface Burning CharacteristicsWhen utilized asa finished substrate without decoration, fiber-mat reinforcedcementitious backer units shall have a reported flame spreadC1325 183index of 10 or less and a smoke developed index of not morethan 5 when tested in accordance with Test Method E84. Testsshall be conducted on samples that have been cured for 28 daysin a controlled atmosphere of 73 6 4F (23 6 2C) and 50 65 % relative humidity.S1.3.5 Shear Bond Strength (Dry-Set Cement Mortar
