1、Designation: C 1635 06Standard Test Method toEvaluate Adhesion/Cohesion Properties of a Sealant atFixed Extension1This standard is issued under the fixed designation C 1635; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、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.1. Scope1.1 This test method describes a laboratory procedure formeasuring the adhesion/cohesion properties of a sealant whens
3、ubjected to tensile loads resulting from an applied specifiedstrain. The adhesion/cohesion properties are evaluated before,during, and after water immersion.1.2 This test method examines the adhesive and cohesiveperformance of a sealant on a specified substrate at a strainequivalent to a multiple of
4、 the strain/movement capabilitydesignated by the manufacturer for the given sealant perSpecification C 920.1.3 The values stated in SI (metric) units are to be regardedas the standard. The inch values given in parentheses are forinformation only.1.4 This standard does not purport to address all of t
5、hesafety 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.1.5 Comparable Test:1.5.1 ISO 10590, Building construction - Jointing
6、products- Sealants - Determination of adhesion/cohesion properties atmaintained extension after immersion in water1.5.2 ISO 8340, Building construction - Jointing products -Sealants - Determination of tensile properties at maintainedextension2. Referenced Documents2.1 ASTM Standards:2C 717 Terminolo
7、gy of Building Seals and SealantsC 719 Test Method for Adhesion and Cohesion of Elasto-meric Joint Sealants Under Cyclic Movement (HockmanCycle)C 920 Specification for Elastomeric Joint SealantsC 1375 Guide for Substrates Used in Testing Building Sealsand Sealants3. Terminology3.1 Definitions:3.1.1
8、casting spacersthe spacers used in the fabrication ofthe joints made from wet sealant3.1.2 separatorsthe device or item used to maintain thespecimens at fixed extension.4. Summary of Test Method4.1 Test specimens made in accordance with dimensions setforth in Test Method C 719 are fabricated and all
9、owed to cure.4.2 Test specimens are extended at standard conditions to aspecified strain and blocked at the strain for a specified periodof time.4.3 The test specimens are examined for adhesive or cohe-sive failure, or both, of the sealant at 0, 24 and 168 h.4.4 A duplicate set of three test specime
10、ns are cured atstandard conditions, extended to a specified strain, and thenimmersed (totally) in deionized water or specified medium (3specimens/liter of liquid).4.5 Immersed test specimens are observed at 0, 24 and 168and other additional specified hours.4.6 This test method uses ASTM standard sub
11、strates asdescribed in Guide C 1375. This test method does not excludethe use of any other substrate that provides a suitable flatsurface.5. Significance and Use5.1 In any sealant application, the sealant must be capable ofmaintaining an adhesive bond to the substrate when held instrain for its inte
12、nded service life.5.2 This test method is an indicator of a sealants ability toadhere under strain to a given substrate.1This test method is under the jurisdiction ofASTM Committee C24 on BuildingSeals and Sealants and is the direct responsibility of Subcommittee C24.30 onAdhesionCurrent edition app
13、roved Jan. 1, 2006. Published February 2006.2For 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 I
14、nternational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.3 The default test strain is the movement ability of thesealant as designated by the manufacturer. The default jointconfiguration is 12.7 3 12.7 3 50.8 mm (12 312 3 2 in.).Other strains and joint conf
15、igurations may be used and reportedas noted in Section 8 and Table 1.6. Apparatus and Materials6.1 Container, for immersion made of a material compatiblewith the immersion medium.6.2 Device, to provide a strain on the test specimen.6.3 Spatulas, for use in applying the sealant.6.4 Caulking Gun, for
16、extruding sealant from cartridgeswhen applicable.6.5 SubstratesTwelve substrates minimum of 25.4 3 76.2mm (1 3 3 in.) of the same finish are required for each testsample.6.6 Casting SpacersMade from polytetrafluoroethylene(PTFE) or a suitable rigid material shall be used with each testspecimen to wh
17、ich the test sealant will not bond and willprovide the appropriate joint dimensions and configurations.6.7 Substrate Cleaning Materials:6.8 Primer (if needed).6.9 Separators, to provide a constant strain on the specimenwhilst maintaining parallel bond surfaces.6.10 Deionized Water, or other specifie
18、d liquid medium forimmersion6.11 Suitable Probe Type Measuring Device, capable ofmeasuring defects in the sealant to 1 mm (132 in.)7. Procedure7.1 Preparation of Test Specimens. Six test specimens.7.1.1 Standard conditions of temperature and relative hu-midity used throughout this test method are de
19、fined as inTerminology C 717.7.1.2 Clean the substrates per the procedures set forth inTest Method C 719 and Guide C 1375.7.1.3 PrimersWhere use of primer is recommended bythe sealant manufacturer, substrate materials shall be primedwith the recommended primer or primers.7.1.4 Apply a bead of sealan
20、t 12.7 3 12.7 3 50.8 mm (12312 3 2 in.) between parallel 25.4 3 76.2 mm (1 3 3 in.)substrates (or of other desired dimensions and noted in thereport). Use appropriate casting spacers to form the proper sizebead. Use adhesive tape, rubber bands, or clamps to hold thetest assembly together before and
21、after filling it with thesealant. In the case of a pourable-type sealant, use masking orany other suitable tape to retain the sealant. Use masking tapeon top surface of substrates to prevent sealant from curing onthe top surface. Remove the tape immediately following fillingthe specimen joint cavity
22、.7.2 Curing Method7.2.1 Cure specimens under one of the following cycles:7.2.1.1 Standard Conditions23 6 2C (73.4 6 3.6 F), 506 5 % relative humidity for a minimum of 21 days.7.2.1.2 Alternately, cure for a total of 21 days as follows: (a)7 days at standard conditions above; (b) 7 days at 38 6 2C(10
23、0 6 3.6 F) and 95 % relative humidity; (c) 7 days atstandard conditions.7.2.1.3 The sealant manufacturer may request conditionsother than those specified provided the temperature does notexceed 50C (122F).7.2.2 Remove the casting spacers from the specimens aftercuring.7.2.2.1 During the second week
24、of the curing period, makeattempts to free the compound from the casting spacer blocksat the ends and bottom without damaging the sealant bead.7.2.2.2 Separate the casting spacer blocks from the sealantas soon as practical during the curing period without damagingthe sealant.7.3 Extend all specimens
25、 until the separation between thesubstrates provides the desired strain. Apply this strain at aminimum of 3 mm/h (18 in./h).7.4 When the specimens have reached their specified exten-sion, block the specimens with the appropriate separator andremove from the extension device/machine. Do not removesep
26、arators for the duration of test.7.5 Place three test specimens in water (minimum of 0.33 L(0.09 gal) per specimen) at a specified temperature with thedefault being 23 6 2C. (73 6 4F). Ensure that the testspecimens are fully immersed.7.6 Leave three test specimens at standard conditions.7.7 Unless o
27、therwise specified, record the length and widthof the adhesive and cohesive defects at 0, 24 and 168 h afterreaching the target strain at the standard conditions and waterimmersed conditions.7.8 Record adhesive and cohesive defects observed of eachof the test specimens. Record the number, location,
28、length anddepth of the defect to the nearest 1 mm (132 in.) and note if theyare adhesive or cohesive for each sample. Photographs areadvisable so that a future review can be made.8. Test Report8.1 Report the following information:8.1.1 Sealant used, color, manufacturers lot number andrated movement
29、capability per Specification C 920 as desig-nated by the manufacturer,8.1.2 Actual dimensions of the joint and configuration,8.1.3 Cleaning method,8.1.4 Description of the test substrate(s),8.1.5 Primer used,TABLE 1 Suggested Strains for a 12.7-mm (0.50-in.) Wide Sealant Joint.Sealant MovementRating
30、Distance between panelsat 13 movement ratingDistance between panelsat 1.53 movement ratingDistance between panelsat 23 movement ratingDistance between panels at43 movement rating12.5 % 14.0 mm (0.55 in.) 14.7 mm (0.58 in.) 15.5 mm (0.61 in.) 19.0 mm (0.75 in.)25 % 15.5 mm (0.61 in.) 17.2 mm (0.68 in
31、.) 19.0 mm (0.75 in.) 25.4 mm (1 in.)50 % 19.0 mm (0.75 in.) 21.8 mm (0.86 in.) 25.4 mm (1 in.) 38.1 mm (1.5 in.)100 % 25.4 mm (1 in.) 31.8 mm (1.25 in.) 38.1 mm (1.5 in.) 63.5 mm (2.5 in.)C16350628.1.6 Curing method,8.1.7 Strain induced on the sealant during the test in % oforiginal joint width,8.1
32、.8 Strain rate, and8.1.9 The immersion medium and temperature.8.1.10 Report the Nature of test effects observed, such asamount of adhesive or cohesive failure, deformation, bubbles,or other characteristics, for each sample at 0, 24 and 168 h fordry and immersed samples.8.1.11 Deviations from standar
33、d conditions including sub-strates utilized, time of cure, use of primer, observations, andother deviations.9. Precision and Bias9.1 Precision and bias testing involved two round-robintesting studies in five laboratories as noted below.39.1.1 The first study had five laboratories testing fivesealant
34、s.9.1.2 Results within a laboratory were repeatable within10 % and many of the results had no variation whatsoever. Ifthe sealant product adhered or did not adhere to the substrates,it did so consistently when fabricated by the same technician.9.1.3 Results from the first round robin showed that var
35、ia-tion between laboratories was up to 6100 %. However whenstudying the data carefully, it shows that two products in thefive laboratories were the source of the variation. Three of thefive products showed variation between laboratories of 610 %.This result was encouraging.9.1.4 The second round-rob
36、in test was initiated between thesame five laboratories using the two products that gave thelarge deviations between laboratories. The leadership of thetest laboratories met in Kansas City, Missouri, United States, inJune of 2004 to discuss the variations of technique that canhappen in each laborato
37、ry. The group decided to retest the twoproducts that were the source of the large variation and focuson laboratory technique.9.1.5 Results from the second study once again within asingle laboratory were repeatable within 10 % or less.9.1.6 Results between laboratories on one product testedwere repea
38、table within 10 % in all five laboratories. The otherproduct tested was repeatable within 10 % in four of fivelaboratories and varied by 100 % in the fifth laboratory.10. Keywords10.1 adhesion; adhesive defect; casting spacer; cohesion;cohesive defect; constant strain; immersion; primer; sealant;sep
39、arator; standard conditions; substrateASTM International takes no position respecting the validity of any 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 r
40、iskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision 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 t
41、his standard or for additional standardsand should be addressed to ASTM International Headquarters. Your 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 shouldmak
42、e your views known to the ASTM Committee 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 or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).3This data can be found in Research Report C241055 available from ASTMHeadquarters.C1635063
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