1、Designation: C 1265 94 (Reapproved 2005)e1Standard Test Method forDetermining the Tensile Properties of an Insulating GlassEdge Seal for Structural Glazing Applications1This standard is issued under the fixed designation C 1265; the number immediately following the designation indicates the year ofo
2、riginal 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 reapproval.e1NOTEEditorial changes were made throughout in July 2005.1. Scope1.1 T
3、his test method covers a laboratory procedure forquantitatively 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
4、 andthe edge spacer into a monolithic sealed insulating glass unit.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
5、.”1.2 The characterization of the IG secondary sealant prop-erties, 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 s
6、eal assemblyinfluences the secondary sealant properties.1.3 The 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 sea
7、l of IG units arerecognized as having the necessary durability 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.2. R
8、eferenced Documents2.1 ASTM Standards:2C 717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsRefer to Terminology C 717 for definitionsof the following terms used in this test method: adhesivefailure, cohesive failure, elastomeric, glazing, lite, primer, seal,sealant, silicone
9、 sealant, structural sealant, substrate.4. Summary of Test Method4.1 Five specimens 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
10、 23 6 2C(74 6 3.6F) at a rate of 5 6 0.5 mm (0.2 6 0.02 in.) perminute. Strength, 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 application
11、s, only theinward lite of glass is usually adhered to the frame. As a result,a significant 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 primar
12、y seal; however, it mayprovide data on load sharing between the primary IG vapor 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
13、-tions should be described when reporting the data.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). See Fig. 1.6.1
14、.1 Fixed MemberA fixed or essentially stationarymember carrying a grip.6.1.2 Movable MemberA movable member carrying asecond grip.1This test method is under the jurisdiction of ASTM Committee of C24 onBuilding Seals and Sealants and is the direct responsibility of Subcommittee C24.30on Adhesion.Curr
15、ent edition approved July 1, 2005. Published August 2005. Originallyapproved in 1994. Last previous edition approved in 1999 as C 1265-94(1999).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards v
16、olume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.3 GripsThe grips should be suitable to firmly graspthe test fixture that holds the test specimen a
17、nd should bedesigned to minimize eccentric specimen loading. 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
18、furnishing a tensile force to the joint specimen.6.2 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 o
19、f 6.3 by 25 by76 mm (0.25 by 1.0 by 3.0 in.) in size. 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 sensitiv
20、e coatings should be tested as theyare used. If a coating 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 Se
21、alantThis sealant or sealant tape, that isnon-structural, 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 bloc
22、ks, or both,made from TFE-fluorocarbon or other suitable 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 Substra
23、te Cleaning Materials:6.8.1 PrimaryMaterials common to 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
24、:6.9.1 PrimaryMaterials common to industry practice ofthe 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
25、 manufacturer of the IG unit beingevaluated.7.1.1.2 When 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
26、 the surfaces (without touching them) in distilled ordeionized 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 ar
27、eavailable, wipe substrates with a clean, dry, lint-free cloth, thenthoroughly clean with a second 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 d
28、ictated by the joint design being evaluated. (See Fig.2). Care should be taken to ensure that assembly of thesubstrate panels, IG joint spacer, and primary IG joint seal arerepresentative of the actual joint design.7.2 Sample Preparation:3Dawn, made by Proctor and Gamble Co., P.O. Box 599, Cincinnat
29、i, 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 MethodC 1265 94 (2005)e127.2.1 Prepare a minimum of five specimens for each sealant,substrate, and geometry combination being test
30、ed, as shown inFig. 2.NOTE 4Five test specimen assemblies 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,
31、and the two primary IGedge seals prior to application of 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 a
32、ctual joint design beingevaluated. See Appendix X1 for a 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 thes
33、ubstrate surfaces. Take special care to strike off the sealantflush 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
34、 part sealants) or seven days (two partsealants) at 23 6 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
35、 this in the report.8. Procedure8.1 Testing8.1.1 Measure 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 at2
36、3 6 2C (73 6 4F) and 50 6 6 % relative humidity. Testspeed 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
37、 to an elongation of 10 %. Also record the load atelongations 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
38、maximum load is evident.8.1.4 Record the nature of the failure, 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 loa
39、d peak due to theprimary IG seal failure if such a peak is evident.8.2.2 Observe the specimens and record any obvious airbubbles trapped in the sealant during the preparation of the testspecimens.FIG. 2 Test SpecimenFIG. 3 Typical Load Versus Elongation PlotC 1265 94 (2005)e139. Calculation9.1 Calcu
40、late the force per unit length or joint (R), in N/mm(lbs/in.):Rs 5 T/Ls 5 setback (1)where:T = the applied 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
41、 (see Fig. 3):K10 % 5T10 %/0.1*L*W! (2)where:T10 % = the measured or estimated force at 10 % elonga-tion,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 for
42、m shown in Fig. 4 or similar.10.1.2 Provide a scale sketch of the specimen cross section,showing details 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 peri
43、od,if the curing conditions deviated from those listed, and anyother deviation from the method.10.1.4 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 nomin
44、al elastic stiffness at 10 % elongation,as calculated in 9.2.10.1.7 Report mode of failure in percent 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 Te
45、st Method for Edge Seal Strength14 in. (6 mm)Setback, 10 % Elongation at Test Load:11.1.1 I(r)The repeatability (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
46、laboratory on the samematerial will be expected to exceed 17.630 psi only about 5 %of the time.11.1.2 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 ob
47、tained in a different laboratory onthe same material will be expected to exceed 40.562 psi onlyabout 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 f
48、ive laboratories is 23.308psi. In future use of this test method, the difference betweentwo test results 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 m
49、aterial 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 repeatability (within a given laboratory)interval for one material tested by five laboratories is 27.916psi. In future use of this test method, the difference betweentwo test results obtained in the same la
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