1、Designation: E736/E736M 17Standard Test Method forCohesion/Adhesion of Sprayed Fire-Resistive MaterialsApplied to Structural Members1This standard is issued under the fixed designation E736/E736M; the number immediately following the designation indicates the yearof original adoption or, in the case
2、 of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This t
3、est 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-cable
4、to both laboratory and field procedures as indicated inSection 7.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combin
5、ingvalues from the two systems may result in non-conformancewith the standard.1.3 This standard does not purport to address all of thesafety problems, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental pra
6、ctices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides a
7、nd Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2E84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE119 Test Methods for Fire Tests of Building Constructionand MaterialsE605/E605M Te
8、st Methods for Thickness and Density ofSprayed Fire-Resistive Material (SFRM) Applied toStructural MembersE1494 Practice for Encapsulation Testing of FriableAsbestos-Containing Surfacing Materials3. Summary of Test Method3.1 The cohesion/adhesion is determined using a metal orplastic cap with a hook
9、 attached. The cap is attached 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 se
10、rviceability. Satisfactory 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.4.2 For coh
11、esion/adhesion testing of installed asbestos-containing sprayed fire-resistive materials, refer to PracticeE1494.5. Apparatus5.1 Fig. 1 illustrates a suitable apparatus.5.2 Bottle Screw Cap,3metal or rigid plastic 51 mm to83 mm 2 in. to 314 in. in diameter and 12 mm 12 in. innominal depth. A hook sh
12、all be attached at the center. Wheredeck profile does not allow the use of an 83-mm 314-in.diameter cap due to area restriction, a minimum 51-mm 2-in.diameter cap shall be used.1This test method is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibili
13、ty of Subcommittee E06.21on Serviceability.Current edition approved Sept. 1, 2017. Published October 2017. Originallyapproved in 1980. Last previous edition approved in 2015 as E736/E736M 00 (2015)1. DOI: 10.1520/E0736_E0736M-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, o
14、rcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards 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 s
15、uppliers are also available.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles
16、 for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15.3 Adhesive, single or two component, suitable for adher-ing cap to SFRM.45.4 Weighing Scale, spring type (fish hook), with a capacitysuitab
17、le for the SFRM being tested (typically 12 to 30 kg 26to 66 lb capacity). The accuracy shall be within 0.1 kg 14 lb.5.5 Galvanized Steel Sheet, 1.5 mm 0.060 in. (16 ga)thick, 300 mm 12 in. square, cleaned with solvent to removeany oil from surface to be sprayed.5.6 Drying Oven, capable of maintainin
18、g temperature andhumidity conditions during the specimen curing cycle, inaccordance with the SFRM manufacturers published require-ments.6. Sampling6.1 This test method requires the application of SFRM inaccordance with manufacturers published instructions. Theapparatus, materials, and procedures use
19、d to spray apply theSFRM for this 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 E119 fire exposure tests of the same material, or asrequired by the sponsor of the tes
20、t.6.3 Determine and report in accordance with Test MethodsE605/E605M 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 f
21、rom material adjacent to the test specimen.7. Test Specimen7.1 Laboratory Tests:7.1.1 The SFRM shall be applied at a thickness of 12 to25 mm 12 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(20 6 10 C 68 6 18 F). After 72 h, samples
22、may be forcedried in a drying oven at 43 6 6C 1106 10 F, and arelative humidity not greater than 60 % until successiveweight5readings, taken at 8 h intervals, differ by less than onepercent.7.1.3 Testing may be performed after it has been determinedthat all samples have reached constant weight as de
23、fined in7.1.2.7.2 Field Tests:7.2.1 The test specimen shall be the in-place SFRM asapplied to any field condition surface. Where a 300 by 300-mm12 by 12-in. area is not available, such as on beams and fluteddeck, use the width of the beam or the width of a flute by300 mm 12 in. length. The area shal
24、l be at least 100 by300 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 e
25、xpedite drying.8. 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 cur
26、es, or carefully 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
27、 a minimum uniform 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 oc
28、curs or other 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.4Suitable adhesives are commercially available. Refer to Appendix
29、X1.1 for alist of adhesive supply houses that have been found satisfactory for this purpose.5Although mass is being determined, the term weight is used in the test methodas an accepted substitute.FIG. 1 Typical Cohesion/Adhesion Testing ApparatusFIG. 2 In-Place ApparatusE736/E736M 1729. Calculation9
30、.1 Calculate the cohesive/adhesive force (bond strength) asfollows:CA 5 F/A (1)where:CA = cohesive/adhesive force, Pa lb/ft2,F = recorded force, N lbf, andA = area of the cap, m2ft2.10. Report10.1 Report the following information:10.1.1 Force, newtons pounds force,10.1.2 Cohesive/adhesive force (bon
31、d strength), pascalspounds force per square foot,10.1.3 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
32、 in the failure,if it extends beyond the perimeter of the cap,10.1.5 Thickness of the SFRM, millimetres inches, and10.1.6 Density of the SFRM, kilograms per cubic metrepounds per cubic foot.11. Precision and Bias11.1 PrecisionThe precision of this test method is beingdeveloped and will be added when
33、 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 method.12. Keywords12.1 cohesion/adhesion testing; fire-resistive materials;sprayed materials testingAPPENDIX(Nonmandatory Information)X1. TEST A
34、PPARATUSX1.1 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). 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:/ 173
