1、Designation: E 760 92 (Reapproved 2005)Standard Test Method forEffect of Impact on Bonding of Sprayed Fire-ResistiveMaterial Applied to Structural Members1This standard is issued under the fixed designation E 760; the number immediately following the designation indicates the year oforiginal adoptio
2、n 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.This standard has been approved for use by agencies of the Department of Defense.1. Sc
3、ope1.1 This test method covers a procedure for determining theeffect of impact loading on the bonding of sprayed fire-resistivematerial (SFRM) applied to the underside of steel floor deck.These materials include sprayed fibrous and cementitiousmaterials applied directly in contact with the structura
4、l mem-bers. The test method is applicable only to laboratory proce-dures.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its u
5、se. 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.2. Referenced Documents2.1 ASTM Standards:2E84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE1
6、19 Test Methods for Fire Tests of Building Constructionand MaterialsE 605 Test Methods for Thickness and Density of SprayedFire-Resistive Material (SFRM) Applied to StructuralMembersE 695 Method for Measuring Relative Resistance of Wall,Floor, and Roof Constructions to Impact Loading3. Summary of Te
7、st Method3.1 In this test method, a cellular steel deck with a concretetopping sprayed with fire-resistive material is subjected to aleather bag drop impact while supported horizontally at itsends.4. Significance and Use4.1 The intent of this test method is to determine a propertyof SFRM that may be
8、 used to provide an indication of itsin-place serviceability. 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 satisfacto
9、ry performance under fire conditions.4.2 The test method measures the behavior of SFRM whenthe floor construction to which it is applied is subjected toshock loading and evaluates adhesion and resistance to spal-ling, cracking, and delamination. It is an indication of theability of SFRM to remain in
10、 place and resist removal duringanticipated service conditions.5. Apparatus5.1 SupportsRigid base to provide at least 50 mm (2 in.)bearing and a clear span between supports of at least 3 m (10ft).5.2 Impact InstrumentA lead shot- or steel shot-filledleather bag weighing 27.2 kg (60 lb) and equipped
11、with aleather hoisting strap, both as described in Method E 695.5.3 RuleTo measure the height of drop (1.2 m (4 ft) withan accuracy of 12.8 mm (12 in.).6. Materials6.1 The test specimen shall be a deck assembly consisting ofcellular steel deck and a concrete topping. The cellular steeldeck shall be
12、of the noncomposite type, nominal 40 mm (112in.) deep, 600 mm (24 in.) wide, by 3600 mm (12 ft) long,consisting of a 1.5-mm (0.060-in.) thick galvanized or painted1This test method is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommi
13、ttee E06.21on Serviceability.Current edition approved May 1, 2005. Published May 2005. Originallyapproved in 1980. Last previous edition approved in 2000 as E 760 92 (2000).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For A
14、nnual Book of ASTMStandards volume 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.steel fluted top section and 1.2-mm (0.048-in.) galvanized steelflat bott
15、om section welded together to form four cells 150 mm(6 in.) on center.6.2 The concrete shall be nominal 20 MPa (3000 psi), and64 mm (212 in.) deep as measured from the top plane to thesteel decking.6.3 This test method requires the application of SFRM inaccordance with manufacturers published instru
16、ctions. Theapparatus, materials, and procedures used to apply the SFRMfor this test shall be representative of application in the field.6.4 The density of the prepared sample shall be similar tothe density tested and reported during the Test Methods E119and Test Method E84fire exposure tests or as r
17、equired by thesponsor of the test.6.5 Determine the density and thickness of each of thelaboratory-prepared specimens. Report in accordance with TestMethods E 605.7. Test Specimen7.1 Laboratory Tests:7.1.1 Apply the SFRM to the underside of the steel deck nosooner than seven days after the concrete
18、has been placed. Donot apply the SFRM to the area 330 mm (13 in.) in from eachend of the specimen, in order to permit the steel deck to beardirectly on the supports.7.1.2 Condition the prepared specimen for a period of notless than one week at ambient temperature and humidityconditions (not less tha
19、n 4.4C (40F).7.1.3 Condition the specimen for a period sufficient to beconsidered dry in accordance with the manufacturers recom-mendation.8. Procedure8.1 Place the specimen on the test supports with the SFRMas the lower surface and the concrete as the upper surface.8.2 Hoist the bag to a height of
20、1.2 m (4 ft) as measuredfrom the upper face of the specimen to the bottom of the bag.8.3 Apply an impact load once to the middle of the upperface of the specimen by dropping the leather bag.9. Report9.1 Report the following information:9.1.1 A complete description of the overall specimen, in-cluding
21、 the final physical condition and appearance of theSFRM after impact,9.1.2 Any spalling, delamination, cracking, and9.1.3 Thickness in millimetres (or inches) and the density ofthe SFRM in kilograms per cubic metre (or pounds per cubicfoot).10. Precision and Bias10.1 No statement is made about eithe
22、r precision or bias ofthis test method since the results merely describe qualitativelythe physical condition of the test specimen after exposure to thespecified procedure.11. Keywords11.1 impact loading; sprayed fire-resistive material; steelfloor deckASTM International takes no position respecting
23、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 riskof infringement of such rights, are entirely their own responsibility.This standard
24、 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 this standard or for additional standardsand should be addressed to ASTM International
25、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 shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This
26、 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).E 760 92 (2005)2
