1、Designation: E2098/E2098M 13 (Reapproved 2018)Standard Test Method forDetermining Tensile Breaking Strength of Glass FiberReinforcing Mesh for Use in Class PB Exterior Insulationand Finish Systems (EIFS), after Exposure to a SodiumHydroxide Solution1This standard is issued under the fixed designatio
2、n E2098/E2098M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision
3、 or reapproval.1. Scope1.1 This test method covers procedures for determining thebreaking force of glass fiber mesh following their conditioningin an alkali solution. The method is applicable to glass fibermesh used in Class PB Exterior Insulation and Finish Systems(EIFS) with base coats that contai
4、n portland cement as aningredient.1.2 Breaking force is expressed both as force per unit widthof mesh and as a percentage of the breaking force of the meshthat has not been exposed to alkali conditioning.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as sta
5、ndard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard.1.4 This standard does not purport to address all of thesafety concerns, if any, as
6、sociated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally
7、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:2D76/D76M Specifi
8、cation for Tensile Testing Machines forTextilesD579/D579M Specification for Greige Woven Glass FabricsD5035 Test Method for Breaking Force and Elongation ofTextile Fabrics (Strip Method)E631 Terminology of Building ConstructionsE2110 Terminology for Exterior Insulation and Finish Sys-tems (EIFS)2.2
9、Other Documents:3EIFS Industry Members Association (EIMA) GuidelineSpecification for Exterior Insulation and Finish Systems(EIFS), Class PB3. Terminology3.1 For general terminology regarding EIFS and building ingeneral, see Terminology E2110 (for EIFS terms) and Termi-nology E631 (for buildings in g
10、eneral).4. Summary of Test Method4.1 Specimens are tested for breaking force with and with-out conditioning. Conditioning is immersion for 28 days in anaqueous solution of 5 % sodium hydroxide.4.2 Breaking force is determined by mounting a test speci-men in a tensile testing machine and applying a f
11、orce to thespecimen until it breaks.1This test method is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.58on Exterior Insulation and Finish Systems (EIFS).Current edition approved Sept. 1, 2018. Published September 2018. O
12、riginallyapproved in 2000. Last previous edition approved in 2013 as E2098/E2098M13.DOI: 10.1520/E2098_E2098M13R18.2For 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 t
13、he standards Document Summary page onthe ASTM website.3Available from the EIFS Industry Members Association (EIMA), 513 WestBroad Street, Suite 210, Falls Church, VA 22046-3257, http:/.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesTh
14、is 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 (
15、TBT) Committee.15. Significance and Use5.1 Glass fiber reinforcing meshes are used to strengthenEIFS. The reinforcing meshes are embedded into base coatsthat contain portland cement, which potentially exposes theglass fibers in the reinforcing meshes to weakening by theaction of alkali. The breaking
16、 force following alkali exposureas determined by this method, is a factor used to comparativelyevaluate the alkali resistance of EIFS glass fiber reinforcingmeshes in the laboratory.5.2 This test method does not purport to simulate theconditions that may be encountered in service. The perfor-mance o
17、f an EIFS is a function of many factors, such as properinstallation, rigidity of supporting construction and resistanceof the EIFS to deterioration by other causes.6. Apparatus and Reagents6.1 Tensile Testing Machine, of the controlled rate ofextension type, as defined in Specification D76/D76M, clu
18、mpsand jaw faces conforming to those in Test Method D5035.6.2 Container and Container Cover for Alkali SolutionMaterial inert to alkali of suitable dimensions to permit unbentmesh specimens to be fully covered with a depth of 25 mm1 in. of alkali solution. The cover for the container shall be ofsuit
19、able design to prevent evaporative loss from the solutionwhich would increase its concentration.6.3 Distilled Water.6.4 Reagent Grade Sodium Hydroxide.7. Sampling7.1 Laboratory Samplefrom a sample roll, cut 30 speci-mens 50 6 3 mm 2 in. wide at least 600 6 13 mm 24 in.long; 15 specimens with their l
20、ong dimensions parallel to themachine (warp) direction, and 15 specimens with their longdimensions parallel to the cross (fill) direction.7.2 The actual number of yarns shall be equal within thewidth dimensional tolerance allowed (63mm18 in.), and theactual number of yarns shall be reported.7.3 Spec
21、imens shall be spaced across the width of the fabricto ensure representation of different warp yarns. Fill specimensshall be from widely spaced locations within the sample roll.8. Preparation of Specimens8.1 Number each specimen at both ends and then cut thespecimens in half crosswise to provide one
22、 set for determiningthe conditioned breaking force and another set for determiningthe unconditioned breaking force. This allows for breaks onpaired specimens which leads to more direct comparison ofalkali conditioned versus unconditioned breaking force.9. Alkali Conditioning of Specimens9.1 Record t
23、he number of and placement of each specimenso that, following conditioning, the breaking force value ofeach conditioned specimen may be associated with the break-ing force value of the unconditioned specimen from the same50 by 600 mm 2 by 24 in. strip. Markings may be destroyedby the alkali exposure
24、. Any specimen tags used shall not bereactive with the alkali solution.9.2 Prepare a 5 % (50 g/L 6.68 oz/gal) sodium hydroxidesolution and place it in the conditioning container to a depthsufficient to cover the specimens with 25 mm 1 in. ofsolution. Maintain the solution at 22 6 3 C 72 6 5 F.9.3 Im
25、merse in the solution one 50 by 300 mm 2 by 12 in.specimen strip from each pair cut from the 50 by 600 mm 2 by24 in. strips. Cover the strips by 25 mm 1 in. of solution. Thestrips shall be straight. If the strips have a tendency to curl, theymay be weighted at the ends by small weights inert to thes
26、olution, such as ceramic tile fragments. Cover the solutioncontainer with a tight cover and mark the solution level on thecontainer. Self clinging plastic wrap may be used. If thesolution level drops from evaporative loss, discontinue test.9.4 Condition specimens in the solution for 28 days.9.5 Foll
27、owing the 28 day conditioning, remove specimens,rinse briefly in distilled water, and dry for 7 days at 22 6 3C72 6 5 F and relative humidity of 50 6 5%.9.6 Maintain the specimens not being conditioned at ambi-ent laboratory room temperature of 22 6 3 C 72 6 5 F anda relative humidity of 50 6 5%.10.
28、 Preparation of Tensile Testing Machine10.1 Prepare tensile testing machine in accordance with TestMethod D5035 Section 10.11. Procedure11.1 A resin may be applied to the ends of the specimens tomake “tabs” to prevent slippage and jaw breaks duringbreaking as defined in Specification D579/D579M.11.2
29、 Mount the specimen securely with 200 mm 8 in. ofseparation between the grips.11.3 Operate the machine to extend the specimen at the rateof 100 mm 4 in. per minute until the specimen breaks.11.4 Record the breaking force (N/50 mm lbf/2 in.).11.5 If specimen slips in the jaw, or breaks at the edge of
30、, orin the jaws, discard the result and take another specimen.Continue until five acceptable breaks have been obtained foreach of:(a) Unconditioned specimens with their long directionparallel to the warp.(b) Conditioned specimens with their long direction paral-lel to the warp.(c) Unconditioned spec
31、imens with their long directionparallel to the fill.(d) Conditioned specimens with their long direction paral-lel to the fill.NOTE 1The fragile nature of the specimens and the resultant testvariability will make it obvious to the operator when a sample is itselfdefective or has been damaged by the t
32、esting process. Results of suchsamples should not be used.12. Calculation or Interpretation of Results12.1 Breaking Forcefor each of the four test configura-tions from 11.5 calculate the average breaking force observedE2098/E2098M 13 (2018)2for the five acceptable specimens. Calculate average breaki
33、ngforce as the ratio of conditioned to unconditioned breakingforce, for both the warp and fill directions separately asfollows:SC1U1D1SC2U2D1SC3U3D1SC4U4D1SC5U5D5 3100% (1)where:C1 through C5 are the breaking forces for five acceptableconditioned specimens, and U1 through U5 are the breakingforces f
34、or the five acceptable unconditioned specimens.13. Report13.1 Report the following information:13.1.1 Date(s) of test and date of report.13.1.2 Identification of specimen by manufacturers brand ortrade name.13.1.3 Number of yarns for each sample.13.1.4 Weight in g/m2oz/yd2 of glass fiber mesh prior
35、toalkali conditioning.13.1.5 Average breaking force in N/50 mm lbf/2 in. for:(a) Unconditioned warp direction specimens(b) Conditioned warp direction specimens(c) Unconditioned fill direction specimens(d) Conditioned fill direction specimens13.1.6 Breaking force of the conditioned warp direction as
36、apercentage of the breaking force of the unconditioned warpdirection.13.1.7 Breaking force of the conditioned fill direction as apercentage of the breaking force of the unconditioned filldirection.13.1.8 A statement that the tests were conducted in accor-dance with this method, or a complete descrip
37、tion of anydeviation from this method.14. Precision and Bias14.1 The precision and bias of this test method have notbeen established.15. Keywords15.1 alkali; breaking strength; exterior insulation and finishsystems; glass fiber reinforcing mesh; tensileASTM International takes no position respecting
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