ASTM E2098-2000(2006) Standard Test Method for Determining Tensile Breaking Strength of Glass Fiber Reinforcing Mesh for Use in Class PB Exterior Insulation and Finish Systems (EIF《.pdf

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1、Designation: E 2098 00 (Reapproved 2006)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 designation E 20

2、98; 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 (e) indicates an editorial change since the last revision or reappro

3、val.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 contain portland

4、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 SI units are to be regarded as thestandard. The values given in parentheses are fo

5、r informationonly.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to u

6、se.2. Referenced Documents2.1 ASTM Standards:2D76 Specification for Tensile Testing Machines for TextilesD 579 Specification for Greige Woven Glass FabricsD 5035 Test Method for Breaking Force and Elongation ofTextile Fabrics (Strip Method)2.2 Other Documents:3EIFS Industry Members Association (EIMA

7、) GuidelineSpecification for Exterior Insulation and Finish Systems(EIFS), Class PB3. Summary of Test Method3.1 Specimens are tested for breaking force with and with-out conditioning. Conditioning is immersion for 28 days in anaqueous solution of 5% sodium hydroxide.3.2 Breaking force is determined

8、by mounting a test speci-men in a tensile testing machine and applying a force to thespecimen until it breaks.4. Significance and Use4.1 Glass fiber reinforcing meshes are used to strengthenEIFS. The reinforcing meshes are embedded into base coatsthat contain portland cement, which potentially expos

9、es theglass fibers in the reinforcing meshes to weakening by theaction of alkali. The breaking 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.4.2 This test method doe

10、s not purport to simulate theconditions that may be encountered in service. The perfor-mance of an EIFS is a function of many factors, such as properinstallation, rigidity of supporting construction and resistanceof the EIFS to deterioration by other causes.5. Apparatus and Reagents5.1 Tensile Testi

11、ng Machine, of the controlled rate ofextension type, as defined in Specification D76, clumps andjaw faces conforming to those in Test Method D 5035.5.2 Container and container cover for alkali solutionmaterial inert to alkali of suitable dimensions to permit unbentmesh specimens to be fully covered

12、with a depth of 25 mm (1in.) of alkali solution. The cover for the container shall be ofsuitable design to prevent evaporative loss from the solutionwhich would increase its concentration.5.3 Distilled water5.4 Reagent Grade Sodium Hydroxide1This test method is under the jurisdiction ofASTM Committe

13、e E06 on BuildingConstructions and is the direct responsibility of Subcommittee E06.58 on ExteriorInsulation and Finish Systems (EIFS).Current edition approved Sept. 1, 2006. Published September 2006. Originallyapproved in 2000. Last previous edition approved in 2000 as E 2098 00.2For referenced AST

14、M 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.3Available from the EIFS Industry MEmbers Association (EIMA) 3000 Corpo-rate Cen

15、ter Drive, Suite 270 Morrow, Georgia 30260.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Sampling6.1 Laboratory Samplefrom a sample roll, cut 30 speci-mens 50 6 3 mm (2 in.) wide at least 600 mm 6 13 mm (24in.) long; 15 specimen

16、s with their long dimensions parallel tothe machine (warp) direction, and 15 specimens with their longdimensions parallel to the cross (fill) direction.6.2 The actual number of yarns shall be equal within thewidth dimensional tolerance allowed (6 3mm18 in.), andthe actual number of yarns shall be re

17、ported.6.3 Specimens 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.7. Preparation of Specimens7.1 Number each specimen at both ends and then cut thespecimens in half crosswise

18、 to provide one 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.8. Alkali Conditioning of Specim

19、ens8.1 Record the 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 3 600 mm (2 3 24 in.) strip. Markings may be destroyedby the

20、alkali exposure. Any specimen tags used shall not bereactive with the alkali solution.8.2 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 of solution (1in.). Maintain the solution at 22 6 3C

21、(72 6 5F).8.3 Immerse in the solution one 50 x 300 mm (2 3 12 in.)specimen strip from each pair cut from the 50 x 600 mm (2 324 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 wei

22、ghts inert to thesolution, 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.8.4 Condition specimens in the solution fo

23、r 28 days.8.5 Following the 28 day conditioning, remove specimens,rinse briefly in distilled water, and dry for 7 days at 22 6 3C(72 6 5F) and relative humidity of 50 6 5%.8.6 Maintain the specimens not being conditioned at ambi-ent laboratory room temperature of 22 6 3 (72 6 5F) and arelative humid

24、ity of 50 6 5%.9. Preparation of Tensile Testing Machine9.1 Prepare tensile testing machine in accordance with TestMethod D 5035 Section 10.10. Procedure10.1 A resin may be applied to the ends of the specimens tomake “tabs” to prevent slippage and jaw breaks duringbreaking as defined in Specificatio

25、n D 579.10.2 Mount the specimen securely with 200 mm (8 in.) ofseparation between the grips.10.3 Operate the machine to extend the specimen at the rateof 100 mm (4 in.) per minute until the specimen breaks.10.4 Record the breaking force (N/50 mm lbf/2 in.).10.5 If specimen slips in the jaw, or break

26、s at the edge of, orin the jaws, discard the result and take another specimen.Continue until 5 acceptable breaks have been obtained for eachof:(a) Unconditioned specimens with their long directionparallel to the warp.(b) Conditioned specimens with their long direction paral-lel to the warp.(c) Uncon

27、ditioned specimens 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 dam

28、aged by the testing process. Results of suchsamples should not be used.11. Calculation11.1 Breaking Forcefor each of the four test configura-tions from 10.5 calculate the average breaking force observedfor the five acceptable specimens. Calculate average breakingforce as the ratio of conditioned to

29、unconditioned breakingforce, for both the warp and fill directions separately asfollows:SC1U1D1SC2U2D1SC3U3D1SC4U4D1SC5U5D4 5 3 100% (1)where:C1 through C5 are the breaking forces for 5 acceptableconditioned specimens, and U1 through U5 are the breakingforces for the 5 acceptable unconditioned speci

30、mens.12. Report12.1 Report the following information:12.1.1 Date(s) of test and date of report.12.1.2 Identification of specimen by manufacturers brand ortrade name.12.1.3 Number of yarns for each sample.12.1.4 Weight in g/m2(oz/sq.yd) of glass fiber mesh prior toalkali conditioning.12.1.5 Average b

31、reaking 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 specimens12.1.6 Breaking force of the conditioned warp direction as apercentage of the breaking force of

32、 the unconditioned warpdirection.12.1.7 Breaking force of the conditioned fill direction as apercentage of the breaking force of the unconditioned filldirection.12.1.8 A statement that the tests were conducted in accor-dance with this method, or a complete description of anydeviation from this metho

33、d.E 2098 00 (2006)213. Precision and Bias13.1 The precision and bias of this test method have notbeen established.14. Keywords14.1 alkali; breaking strength; exterior insulation and finishsystems; glass fiber reinforcing mesh; tensileASTM International takes no position respecting the validity of an

34、y patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to rev

35、ision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your

36、 comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyr

37、ighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).E 2098 00 (2006)3