1、Designation: C1087 16Standard Test Method forDetermining Compatibility of Liquid-Applied Sealants withAccessories Used in Structural Glazing Systems1This standard is issued under the fixed designation C1087; the number immediately following the designation indicates the year oforiginal adoption or,
2、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 screening proce-dure for determining the com
3、patibility of liquid-applied struc-tural sealant glazing sealants when in contact with accessoriessuch as dry glazing gaskets, spacers, shims, and setting blocksafter exposure to heat and ultraviolet light.1.2 This test method includes the observation of threeparameters as follows:1.2.1 Changes in t
4、he color of the sealant,1.2.2 Changes in the adhesion of the sealant to glass, and1.2.3 Changes in the adhesion of the sealant to the accessorybeing tested.1.3 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.4 This standard d
5、oes 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 use.NOTE 1At this time, no comparable
6、ISO standard exists.2. Referenced Documents2.1 ASTM Standards:2C717 Terminology of Building Seals and Sealants3. Terminology3.1 DefinitionsDefinitions of the following terms used inthis test method are listed in Terminology C717: adhesivefailure (adhesion loss), bead, bond breaker, cohesive failure,
7、compatibility, gasket, glazing, sealant, setting blocks, shim,spacer, structural sealant, standard conditions, and structuralsealant glazing.4. Summary of Test Method4.1 The test specimens are placed beneath ultraviolet lampsso that the radiation will hit the sealant directly on onespecimen, and thr
8、ough the glass, on the other specimen (seeFig. 1).4.2 The control specimens for this test method are preparedand tested identically to the test specimens except that theaccessory is eliminated.4.3 After the specimens are exposed, the test specimens arecompared to the control specimens.4.4 In the tes
9、ting of the specimens, any color change in thesealant between the test specimen and the control is noted asare any changes in the adhesion of the sealant to either the glassor to the accessory. This test method requires the preparation ofeight test specimens (four controls and four test specimens fo
10、reach accessory being evaluated).5. Significance and Use5.1 In structural sealant glazing systems, the sealant func-tions as the structural adhesive and may also function as theprimary weather seal. As the structural adhesive, the integrityof the adhesive bond is critical.5.2 Changes in color and ad
11、hesion after exposure are two ofthe criteria that can be used to determine the compatibility ofthe system. Experience has shown that accessories that causeloss of adhesion or discoloration in this test method may alsocause these occurrences in actual use.6. Apparatus and Materials6.1 Glass Panels, c
12、lear float glass, approximately 76.2 by50.8 by 6.4 mm (3 by 2 by14 in.). Eight panels are required foreach material being tested.6.2 Bond Breaker Tape, 25.4 by 76.2-mm (1 by 3-in.) piecefor each panel. The bond breaker tape must be compatible withthe sealants being tested.6.3 Thermometer, for exampl
13、e, 28.9 to 100C (20 to 212F).6.4 Ultraviolet (UV) lamps, UVA-340 lamps.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.20 onGeneral Test Methods.Current edition approved June 1, 2016. Published July 2
14、016. Originally approvedin 1987. Last previous edition approved in 2011 as C1087 00 (2011). DOI:10.1520/C1087-16.2For 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
15、 standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16.5 UV Exposure ApparatusA suitable UV exposure ap-paratus will consist of four UVA-340 lamps in a symmetricalarray situated 254 mm (1
16、2 in.) from the surface of the testspecimens (see Fig. 3). The apparatus shall be capable ofmaintaining a temperature at the test specimens of 48 6 2C(118 6 3.6F). Infrared lamps or other sources of heat may beused to maintain the required temperature.6.6 Cleaning SolventAny solvent capable of clean
17、ing theglass is acceptable (for example, 50/50 mix of isopropylalcohol and distilled water).6.7 Test Sealant, an appropriate amount of the sealant to beused in the system.6.8 Reference SealantA light or translucent sealant of thesame composition as the test sealant. If none is available,contact the
18、sealant supplier for recommendations on a suitablealternative.7. Preparation of Test Specimens7.1 Precondition the unopened containers of sealant atstandard conditions for a minimum of 24 h.7.2 Prior to use, clean the glass thoroughly with the cleaningsolvent and dry with a clean rag before the solv
19、ent is allowedto evaporate.7.3 Place a piece of compatible bond breaker tape to cover1 in. of the top surface of the glass at one end (see Fig. 2).7.4 Prepare a total of eight samples (four controls withoutaccessory and four test specimens with accessory).3Cut a pieceof accessory material approximat
20、ely 6.4 by 51 by 6.4 mm (14by2by14 in.) and place it on the center of the piece of glassas shown in Fig. 2. Both the reference sealant and the testsealant are tested in contact with the accessory.7.5 Apply a bead of the test sealant on one side of theaccessory and a bead of translucent or light colo
21、r referencesealant along the other side of the accessory. Tool the sealant sothat good contact with the glass occurs and the sealant is on topof the accessory. The thickness of the sealant on top of theaccessory shall be approximately 3.2 mm (18 in.).7.6 The control specimens for this test are prepa
22、red andtested identically to the test specimens except that the acces-sory is eliminated.8. Conditioning8.1 Condition all the specimens for one week at standardconditions. After conditioning for seven days at standardconditions, place two test specimens (with accessory) and twocontrol specimens (wit
23、hout accessory) with glass side down,and place two test specimens (with accessory) and two controlspecimens (without accessory) with glass side up, under theUV lamps, in accordance with Fig. 1 (a)and1(b) for 21 days.8.2 In order to provide an appropriate intensity of UVradiation, replace the UVA-340
24、 lamps after eight weeks of use.In order to provide more uniform UV radiation, replace onelamp every two weeks, in accordance with the rotation schemeshown in Fig. 4. (Discard lamp No. 3, move lamp No. 2 to lamp3Control specimens need not be duplicated if more than one accessory is beingevaluated at
25、 one time.FIG. 1 Orientation of Test Specimen Under LampsFIG. 2 View of Test SpecimenFIG. 3 UV Exposure ApparatusFIG. 4 UV Lamp RotationC1087 162position No. 3, move lamp No. 1 to lamp position No. 2, movelamp No. 4 to lamp position No. 1 then install the new lamp inlamp position No. 4.)8.3 The test
26、 chamber shall maintain an air temperature of 486 2C (118 6 3.6F) when measured at the surface of the testspecimens (see Fig. 3). Check test specimen surface tempera-tures at one-week intervals.9. Procedure9.1 Record orientation of sample under ultraviolet lights(Fig. 1).9.2 At the end of the condit
27、ioning period described inSection 6, remove the specimens from the exposure apparatusand allow the warm samples to reach room temperature. (Coolfor 4 h.)9.3 Grasp the end of the sealant that is above the bondbreaker tape. Pull the sample on a 90 angle to the glass surfaceexerting force on the sealan
28、t/glass interface.9.3.1 Record the mode of failure in percent cohesive failure,C, for both the test and reference sealant as follows:C 5 100 2 % AL (1)where AL is the adhesion loss.9.4 Check the adhesion of the sealants to the accessory. Pullthe sealant on a 90 angle to the accessory surface exertin
29、gforce on the sealant accessory interface.9.4.1 Record the mode of failure in percent cohesive failure(C).9.5 Observe the test and reference sealant.9.5.1 Using Table 2 as a guide, record and describe anycolor change in the test and reference sealants.9.5.2 Record any other noticeable changes.9.6 Re
30、cord data on report form (Fig. 5).10. Precision and Bias410.1 PrecisionRound-robin testing was performed bythree laboratories using two different sealants and four differentaccessory gaskets. Statistical analysis was performed by com-bining all four accessory gaskets together for each set of tests,r
31、esulting in eight“ materials trialed,” instead of two for eachlaboratory.10.2 Repeatability, I(r)In future use of this test method,the difference between two test results obtained in the samelaboratory on the same material (the repeatability) will beexpected to exceed I(r) only about 5 % of the time
32、. Results forI(r) are given in Table 1.10.3 Reproducibility, I(R)In future use of this test method,the difference between two test results obtained in differentlaboratories on the same material (the reproducibility) will beexpected to exceed I(R) only about 5 % of the time. Results forI(R) are given
33、 in Table 1.10.4 BiasSince there is no accepted reference materialsuitable for determining the bias for the procedures in this testmethod for measuring the color change and adhesionproperties, no statement on bias is being made.11. Keywords11.1 color change; compatibility; staining; structural glaz-
34、ing; structural sealant; ultra violet exposure4Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:C24-1020.TABLE 1 Precision SummarySpecific Evaluation I(r) I(R)Color change, glass side up 0.803 2.166Color change, glass side down 0.
35、782 1.826% cohesive failure of sealant to glass,glass side up21.88 % 39.08 % cohesive failure of sealant to glass,glass side down19.00 % 21.75 % cohesive failure of sealant to accessory,glass side up4.75 % 28.08 % cohesive failure of sealant to accessory,glass side down17.00 % 36.46 %TABLE 2 ASTM Te
36、st Method C1087 Stain and Color Change De-scriptionsNo. Color Change Change Description0 None No change from the control.1 Very, very slight Change so slight that you are notsure it is real.2 Very slight Faint colorgenerally yellow.3 Slight Light colorcommonly yellow,orange, pink, or brown.4 Severe
37、Distinct colorpossibly red or purplein addition to yellow, orange, pink,or brown.5 Very severe Dark colormay be black as well asother colors mentioned.Note 1The colors listed in Table 2 are only the most commonly occurringcolors. Any change of appearance from the controls should be reported.C1087 16
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41、tee on Standards, at the address shown below.This standard is copyrighted 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
42、 or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 5 ASTM C1087 Compatibility Test Report FormC1087 164
