1、Designation: C1265 94 (Reapproved 2011)Standard Test Method forDetermining the Tensile Properties of an Insulating GlassEdge Seal for Structural Glazing Applications1This standard is issued under the fixed designation C1265; the number immediately following the designation indicates the year oforigi
2、nal 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. Scope1.1 This test method covers a laboratory procedure forquantitatively
3、 measuring the tensile strength, stiffness, andadhesion properties of insulating glass edge seals that are usedin structural sealant glazing applications. Edge seals for theseapplications use a structural sealant to bond both glass lites andthe edge spacer into a monolithic sealed insulating glass u
4、nit.In typical applications, the structural sealant acts to hold theoutside lite in place under wind and gravity load and tomaintain the edge spacer in its proper position. Hereafter, theterm “insulating glass” will be abbreviated as “IG.”1.2 The characterization of the IG secondary sealant prop-ert
5、ies, as defined by this test method, are strongly dependent onglass and edge spacer cleaning procedures, IG spacer profile,location of spacer, and primary IG sealant application. Users ofthis test method must recognize that the IG edge seal assemblyinfluences the secondary sealant properties.1.3 The
6、 values determined by this test method will becharacteristic of the particular edge seal assembly that is tested.NOTE 1Presently, only elastomeric, chemically curing silicone seal-ants specifically formulated for use as the secondary seal of IG units arerecognized as having the necessary durability
7、for use in structural sealantglazing applications.1.4 The values stated in SI (metric) units are to be regardedas the standard. The inch-pound values given in parentheses areapproximate equivalents, provided for information purposes.1.5 This standard does not purport to address all of thesafety conc
8、erns, 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 use.2. Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and
9、Sealants3. Terminology3.1 DefinitionsRefer to Terminology C717 for definitionsof the following terms used in this test method: adhesivefailure, cohesive failure, elastomeric, glazing, lite, primer, seal,sealant, silicone sealant, structural sealant, substrate.4. Summary of Test Method4.1 Five specim
10、ens are fabricated to duplicate the edge sealdesign of an IG unit for structural glazing applications. Afterthe secondary structural sealant is cured the specimens aretested to failure in tension. Testing is conducted at 23 6 2C(74 6 3.6F) at a rate of 5 6 0.5 mm (0.2 6 0.02 in.) perminute. Strength
11、, load-displacement response, failure mode,and primary IG edge seal behavior are recorded.5. Significance and Use5.1 Frequently IG units are adhered with a structural sealantto a metal framing system. In such applications, only theinward lite of glass is usually adhered to the frame. As a result,a s
12、ignificant portion of any outward-acting or negative windload must be carried in tension by the joint seal between thetwo lites of the IG unit. This test will not provide informationon the integrity of the IG unit primary seal; however, it mayprovide data on load sharing between the primary IG vapor
13、 sealand the secondary structural sealant.5.2 Although this test method prescribes one environmentalcondition, other environmental conditions and exposure cyclescan be employed for specific project evaluation. Such devia-tions should be described when reporting the data.1This test method is under th
14、e jurisdiction of ASTM Committee of C24 onBuilding Seals and Sealants and is the direct responsibility of Subcommittee C24.30on Adhesion.Current edition approved Dec. 1, 2011. Published December 2011. Originallyapproved in 1994. Last previous edition approved in 2005 as C1265-94(2005)1.DOI: 10.1520/
15、C1265-94R11.2For 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.1Copyright ASTM International, 100 Barr Harbor Dr
16、ive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Apparatus and Accessory Materials6.1 Tensile Testing Machine, capable of producing a tensileload on the specimen at a rate of 5.06 0.5 mm (0.20 6 0.02in.) per minute. The machine shall be capable of measuring theload to 64N(61 lb).
17、 See Fig. 1.6.1.1 Fixed MemberA fixed or essentially stationarymember carrying a grip.6.1.2 Movable MemberA movable member carrying asecond grip.6.1.3 GripsThe grips should be suitable to firmly graspthe test fixture that holds the test specimen and should bedesigned to minimize eccentric specimen l
18、oading. Specimenloading should be perpendicular to both glass substrates. Aswivel or universal joint near one or both ends of the testspecimen may be helpful for alignment purposes.6.1.4 Grip FixtureA fixture capable of being held by thegrips and furnishing a tensile force to the joint specimen.6.2
19、Spatulas, for use in applying sealant.6.3 Caulking Gun, for extruding sealant from cartridgeswhen applicable.6.4 Glass Substrates, of the same type(s) as used in the jointdesign being evaluated.NOTE 2This test method is based on glass substrates of 6.3 by 25 by76 mm (0.25 by 1.0 by 3.0 in.) in size.
20、 Other thicknesses may be tested;however, consideration should be given to preventing breakage orexcessive bending of the glass during testing.NOTE 3The sample tested should reflect the actual IG unit edgeconstruction; that is, glass with sensitive coatings should be tested as theyare used. If a coa
21、ting is edge-deleted in practice, it should be edge-deletedfor the test.6.5 Edge SpacerThe spacer should be identical in mate-rial, cross section, and surface finish to the spacer to be used inthe IG edge seal design being evaluated.6.6 Primary SealantThis sealant or sealant tape, that isnon-structu
22、ral, provides a vapor seal for the IG unit. Itspresence and configuration affects the geometry and behaviorof many structural IG edge seal designs; therefore, it should beincluded as part of the specimen.6.7 Assembly Spacer(s)Spacer(s) or end blocks, or both,made from TFE-fluorocarbon or other suita
23、ble non-bondingmaterial are used to maintain the proper specimen dimensionsduring specimen assembly. Because details of specimens testedby this test method will vary, it is not possible to define a singlespacer or end block shape.6.8 Glass Substrate Cleaning Materials:6.8.1 PrimaryMaterials common t
24、o industry practice forthe IG unit being evaluated.6.8.2 AlternateClean, dry, lint-free cloths. A 0.1 % solu-tion of clear hand dishwashing detergent.3The solution shouldbe made up in distilled or deionized water.6.9 Edge Spacer Cleaning Materials:6.9.1 PrimaryMaterials common to industry practice o
25、fthe IG unit being evaluated.6.9.2 AlternateClean, dry, lint-free cloths. Isopropyl alco-hol (99 %).7. Test Specimen Assembly7.1 Assembly:7.1.1 Glass Cleaning Procedure:7.1.1.1 Prior to assembly, clean the glass using the methodsrecommended by the manufacturer of the IG unit beingevaluated.7.1.1.2 W
26、hen no manufacturers cleaning guidelines areavailable, wipe substrates with a clean, dry, lint-free cloth, thenthoroughly clean with a second clean, lint-free cloth and 0.1 %solution of a clear hand dishwashing detergent,3as described in6.8. Rinse the surfaces (without touching them) in distilled or
27、deionized water and allow to air dry.7.1.2 Edge Spacer Cleaning Procedure:7.1.2.1 Prior to assembly, clean the edge spacer using themethods used by the manufacturer of the IG unit beingevaluated.7.1.2.2 When no manufacturers cleaning guidelines areavailable, wipe substrates with a clean, dry, lint-f
28、ree cloth, then3Dawn, made by Proctor and Gamble Co., P.O. Box 599, Cincinnati, OH 54201,and Palmolive Green, made by Colgate Palmolive Co., 300-T Park Avenue, NewYork, NY 10022, have been found suitable for this purpose.FIG. 1 Suggested Assembly MethodC1265 94 (2011)2thoroughly clean with a second
29、clean, lint-free cloth anddiisopropyl alcohol (99 %) and allow to air dry.7.1.3 Construct the test specimen assemblies by forming asealant cavity 50 mm (2.0 in.) long, with a cavity width anddepth as dictated by the joint design being evaluated. (See Fig.2). Care should be taken to ensure that assem
30、bly of thesubstrate panels, IG joint spacer, and primary IG joint seal arerepresentative of the actual joint design.7.2 Sample Preparation:7.2.1 Prepare a minimum of five specimens for each sealant,substrate, and geometry combination being tested, as shown inFig. 2.NOTE 4Five test specimen assemblie
31、s should be prepared for eachadditional environmental condition being evaluated.7.2.2 Each specimen in each set should be individuallyidentified.7.2.3 Fig. 1 shows a suggested approach to assembly of thetwo pieces of glass, the IG edge spacer, and the two primary IGedge seals prior to application of
32、 the secondary structuralsealant. Special care must be given to accurate placement of allassembly components. Also, it is important that the finalconfiguration (thickness, width, and position) of the primary IGedge seal match that seen in the actual joint design beingevaluated. See Appendix X1 for a
33、 discussion of assemblyprocedures that have been found suitable.7.2.4 Fill each assembly with the secondary structuralsealant that is to be tested. Immediately tool the sealant surfaceto ensure complete filling of the cavity and wetting of thesubstrate surfaces. Take special care to strike off the s
34、ealantflush with the glass edges.7.3 Conditioning:7.3.1 The structural sealant manufacturers recommendedcuring conditions and time should be followed. In the absenceof specific manufacturers recommendations, cure the speci-mens for 21 days (one part sealants) or seven days (two partsealants) at 23 6
35、 2C (73 6 4F) and 50 6 6 % relativehumidity. List any deviations in curing conditions in the report.7.3.2 Remove all assembly spacer sections, but not the IGedge spacer. If assembly spacers are removed prior to the curetime given in 7.3.1, note this in the report.8. Procedure8.1 Testing8.1.1 Measure
36、 and record to the nearest 0.5 mm (0.02 in.)the actual minimum length (dimension L), minimum bondwidth (dimension W) and minimum IG spacer setback (dimen-sion S), as shown in Fig. 2.8.1.2 All specimens are pulled on the tensile test machine at23 6 2C (73 6 4F) and 50 6 6 % relative humidity. Testspe
37、ed shall be 5 6 0.5 mm (0.2 6 0.02 in.) per minute. Theorientation of the specimen in the test grips is shown in Fig. 3.8.1.3 Record tensile load, in Newtons (lbs) versus elonga-tion percent by a continuous plot or at 0.5 mm (0.02 in.)intervals to an elongation of 10 %. Also record the load atelonga
38、tions of 25, 50, and 100 %. Record the initial load peakat failure of the primary IG seal (see Fig. 3). Record theelongation when maximum load is first reached and the highestvalue of elongation achieved at maximum load, if someyielding of the maximum load is evident.8.1.4 Record the nature of the f
39、ailure, whether cohesive oradhesive, or what percentage is cohesive.8.2 Observations:8.2.1 If possible, observe and record the elongation causingfailure of the IG primary seal. This may be taken as theelongation corresponding to the initial load peak due to theprimary IG seal failure if such a peak
40、is evident.8.2.2 Observe the specimens and record any obvious airbubbles trapped in the sealant during the preparation of the testspecimens.9. Calculation9.1 Calculate the force per unit length or joint (R), in N/mm(lbs/in.):Rs 5 T/Ls 5 setback (1)FIG. 2 Test SpecimenC1265 94 (2011)3where:T = the ap
41、plied tensile force and L is the dimension L inFig. 2.9.2 Calculate the nominal elastic stiffness of the joint perunit length in N/mm/mm (lbs/in./in.) at the 10 % elongationlevel by the approximation (see Fig. 3):K10 % 5T10 %/0.1*L*W! (2)where:T10 % = the measured or estimated force at 10 % elonga-t
42、ion,L = length of bond, andW = the width between inside faces of the substratepanels.10. Report10.1 Report the following information:10.1.1 The test data and observations are to be reported onthe form shown in Fig. 4 or similar.10.1.2 Provide a scale sketch of the specimen cross section,showing deta
43、ils of IG edge spacer and primary seal placementand the setback of the spacer.10.1.3 Report the substrate cleaning procedure. Also, reportif the spacers were removed prior to the end of the cure period,if the curing conditions deviated from those listed, and anyother deviation from the method.10.1.4
44、 Report tensile force per unit length in N/mm (lbs/in.)at 10, 25, 50, 100 % and at maximum elongation, as calculatedin 9.1.10.1.5 Report percent elongation at maximum tensile load.10.1.6 Report nominal elastic stiffness at 10 % elongation,as calculated in 9.2.10.1.7 Report mode of failure in percent
45、 cohesive failure.10.1.8 If evident, report the load and elongation at the initialload peak due to the primary IG sealant failure.10.1.9 Report any observations from 8.2.11. Precision and Bias11.1 Test Method for Edge Seal Strength14 in. (6 mm)Setback, 10 % Elongation at Test Load:11.1.1 I(r)The rep
46、eatability (within a given laboratory)interval for 1 material tested by five laboratories is 17.630 psi.In future use of this test method, the difference between twotest results obtained in the same laboratory on the samematerial will be expected to exceed 17.630 psi only about 5 %of the time.11.1.2
47、 I(R)The reproducibility (between given laborato-ries) interval for one material tested by five laboratories is40.562 psi. In future use of this test method, the differencebetween two test results obtained in a different laboratory onthe same material will be expected to exceed 40.562 psi onlyabout
48、5 % of the time.11.2 Test Method for Edge Seal Strength14 in. (6 mm)Setback, 25 % Elongation at Test Load:11.2.1 I(r)The repeatability (within a given laboratory)interval for one material tested by five laboratories is 23.308psi. In future use of this test method, the difference betweentwo test resu
49、lts obtained in the same laboratory on the samematerial will be expected to exceed 23.308 psi only about 5 %of the time.11.2.2 I(R)The reproducibility (between given laborato-ries) interval for one material tested by five laboratories is72.665 psi. In future use of this test method, the differencebetween two test results obtained in a different laboratory onthe same material will be expected to exceed 72.665 psi onlyabout 5 % of the time.11.3 Test Method for Edge Seal Strength14 in. (6 mm)Setback, 50 % Elongation at Test Load:11.3.1 I(r)The repeat
