ASTM E736-2000(2006) Standard Test Method for Cohesion Adhesion of Sprayed Fire-Resistive Materials Applied to Structural Members《结构构件上喷涂的防火材料的粘附性 粘结性的标准试验方法》.pdf

1、Designation: E 736 00 (Reapproved 2006)Standard Test Method forCohesion/Adhesion of Sprayed Fire-Resistive MaterialsApplied to Structural Members1This standard is issued under the fixed designation E 736; the number immediately following the designation indicates the year oforiginal adoption or, in

2、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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 Th

3、is test method covers a procedure for measuring thecohesion/adhesion or bond strength (tensile) perpendicular tothe surface of sprayed fire-resistive material (SFRM) applied torigid backing. These fire-resistive materials include sprayedfibrous and cementitious materials. The test method is appli-ca

4、ble to both laboratory and field procedures as indicated inSection 7.1.2 The values stated in SI units are to be regarded as thestandard. The values in parentheses are for information only.1.3 This standard does not purport to address all of thesafety problems, if any, associated with its use. It is

5、 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:2E84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE119 Test M

6、ethods for Fire Tests of Building Constructionand MaterialsE 605 Test Methods for Thickness and Density of SprayedFire-Resistive Material (SFRM) Applied to StructuralMembers3. Summary of Test Method3.1 The cohesion/adhesion is determined using a metal orplastic cap with a hook attached. The cap is a

7、ttached to theSFRM with a suitable adhesive. An increasing load, measuredby a scale, is applied manually until failure occurs.4. Significance and Use4.1 The intent of this test method is to determine a propertyof SFRM that may be used to provide an indication of itsin-place serviceability. Satisfact

8、ory performance of SFRMapplied to structural members and assemblies depends upon itsability to withstand the various influences that may occurduring construction and during the life of the structure, as wellas upon its satisfactory performance under fire conditions.5. Apparatus5.1 Fig. 1 illustrates

9、 a suitable apparatus.5.2 Bottle Screw Cap,3metal or rigid plastic 51 mm to 83mm (2 in. to 314 in.) in diameter and 12 mm (12 in.) in nominaldepth. A hook shall be attached at the center. Where deckprofile does not allow the use of an 83-mm (314-in.) diametercap due to area restriction, a minimum 51

10、-mm (2-in.) diametercap shall be used.5.3 Adhesive, single or two component, suitable for adher-ing cap to SFRM.45.4 Weighing Scale, spring type (fish hook), with a capacitysuitable for the SFRM being tested (typically 12 kg to 30 kg(26 to 66 lb) capacity). The accuracy shall be within 0.1 kg (14lb)

11、.5.5 Galvanized Steel Sheet, 1.5 mm (0.060 in. (16 ga) thick,300 mm (12 in.) square, cleaned with solvent to remove any oilfrom surface to be sprayed.5.6 Drying Oven, capable of maintaining temperature andhumidity conditions during the specimen curing cycle, inaccordance with the SFRM manufacturers

12、published require-ments.6. Sampling6.1 This test method requires the application of SFRM inaccordance with manufacturers published instructions. The1This test method is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.21on S

13、erviceability.Current edition approved Jan. 1, 2006. Published January 2006. Originallyapproved in 1980. Last previous edition approved in 2000 as E 736 00.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of AST

14、MStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Refer to Appendix X1.2 for a list of bottle screw cap supply houses that havebeen found satisfactory for this purpose. Many local suppliers are also available.4Suitable adhesives are commercially availabl

15、e. Refer to Appendix X1.1 for alist of adhesive supply houses that have been found satisfactory for this purpose.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.apparatus, materials, and procedures used to spray apply theSFRM for thi

16、s test shall be representative of application in thefield.6.2 The density of the prepared specimens shall be similarto the density tested and reported during the Test Methods E84and E 119 fire exposure tests of the same material, or asrequired by the sponsor of the test.6.3 Determine and report in a

17、ccordance with Test MethodsE 605 the density and thickness of each sample, or of arandomly selected specimen from the sample lot when anumber of identical samples are being tested for the laboratory-prepared samples. For the field specimens, determine thedensity from material adjacent to the test sp

18、ecimen.7. Test Specimen7.1 Laboratory Tests:7.1.1 The SFRM shall be applied at a thickness of 12 mm to25 mm (12 in. to 1 in.) to the 300 by 300 mm (12 by 12 in.)galvanized steel sheet.7.1.2 Condition the specimen at room temperature (20610C (68 6 18F). After 72 h, samples may be force dried ina dryi

19、ng oven at 43 6 6C (110 6 10F), and a relativehumidity not greater than 60 % until successive weight5readings, taken at 8 h intervals, differ by less than 1 percent.7.1.3 Testing may be performed after it has been determinedthat all samples have reached constant weight as defined in7.1.2.7.2 Field T

20、ests:7.2.1 The test specimen shall be the in-place SFRM asapplied to any field condition surface. Where a 300- by300-mm (12- by 12-in.) area is not available, such as on beamsand fluted deck, use the width of the beam or the width of aflute by 300 mm (12 in.) length. The area shall be at least 100by

21、 300 mm (4 by 12 in.). See 5.2 for exceptions.7.2.2 Condition the specimen at atmospheric conditions orin accordance with the manufacturers recommendations for aperiod sufficient to be considered dry.7.2.3 Mechanical ventilation may be employed on themanufacturers recommendation to expedite drying.8

22、. Procedure8.1 Apply adhesive sufficient to fill the metal or plastic cap,and immediately place the cap against the surface of theSFRM. Refer to Fig. 2.8.2 Support the cap at the surface until the adhesive hasadequately cured. Wipe away any excess adhesive around thecap before it cures, or carefully

23、 cut it away after it cures.8.3 Laboratory Tests:8.3.1 Restrain the specimen with the SFRM facing up toprevent movement and flexing during testing. The orientationof the specimen in Fig. 2 shows the SFRM facing down.8.3.2 Engage the scale with the hook and exert an increasingforce at a minimum unifo

24、rm or incremental rate of approxi-mately 5 kg (11 lb)/min perpendicular to the surface.8.3.3 Force shall be applied until failure occurs, a predeter-mined value is reached, or until the capacity of the scale isreached.8.3.4 Record the force in newtons (pounds-force) at the timefailure occurs or othe

25、r end point is reached.8.4 Field Tests:8.4.1 Perform tests as described in 8.3.2-8.3.4.8.4.2 A nondestructive field test may be performed byreplacing the scale (see 5.4) with a fixed weight that must besupported for 1 min.9. Calculation9.1 Calculate the cohesive/adhesive force (bond strength) asfoll

26、ows:CA 5 F/A (1)where:CA = cohesive/adhesive force, Pa (lb/ft2),F = recorded force, N (lbf), andA = area of the cap, m2(ft2).10. Report10.1 Report the following information:10.1.1 Force, newtons (pounds force),10.1.2 Cohesive/adhesive force (bond strength), pascals(pounds force per square foot),10.1

27、.3 Description of the type of failure:10.1.3.1 Cohesive failure, if separation occurred within thematerial,10.1.3.2 Adhesive failure, if separation occurred at theinterface of the substrate and the SFRM,10.1.4 Approximate area of material involved in the failure,if it extends beyond the perimeter of

28、 the cap,10.1.5 Thickness of the SFRM, millimetres (inches), and10.1.6 Density of the SFRM, kilograms per cubic metre(pounds per cubic foot).5Although mass is being determined, the term weight is used in the test methodas an accepted substitute.FIG. 1 Typical Cohesion/Adhesion Testing ApparatusFIG.

29、2 In-Place ApparatusE 736 00 (2006)211. Precision and Bias11.1 PrecisionThe precision of this test method is beingdeveloped and will be added when available.11.2 BiasThe procedure on this test method has no biasbecause the value of the cohesive/adhesive strength can bedefined only in terms of a test

30、 method.12. Keywords12.1 cohesion/adhesion testing; fire-resistive materials;sprayed materials testingAPPENDIX(Nonmandatory Information)X1. TEST APPARATUSX1.1 Two-component urethane resin adhesives for use inadhering test caps to SFRM during bond strength testing areavailable from various sources of supply, including those listedas follows: Contact the adhesive manufacturer to determineproduct suitability.Brim Products Co., Inc. C or through the ASTM website(www.astm.org).E 736 00 (2006)3