1、Designation: E760 92 (Reapproved 2011)Standard Test Method forEffect of Impact on Bonding of Sprayed Fire-ResistiveMaterial Applied to Structural Members1This standard is issued under the fixed designation E760; the number immediately following the designation indicates the year oforiginal adoption
2、or, 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope
3、1.1 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 structural m
4、em-bers. The test method is applicable only to laboratory proce-dures.1.2 The values stated in SI units are to be regarded asstandard. The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.1.3 This stan
5、dard does 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.2. Referenced Documents2.1 A
6、STM Standards:2E84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE119 Test Methods for Fire Tests of Building Constructionand MaterialsE605 Test Methods for Thickness and Density of SprayedFire-Resistive Material (SFRM) Applied to StructuralMembersE695 Test Method of Measuring
7、Relative Resistance ofWall, Floor, and Roof Construction to Impact Loading3. Summary of Test 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. Significan
8、ce 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. Satisfactory performance of SFRMapplied to structural members and assemblies depends upon itsability to withstand the various influences that may oc
9、curduring construction and during the life of the structure, as wellas upon its satisfactory 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 spa
10、ll-ing, cracking, and delamination. It is an indication of the abilityof SFRM to remain in 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(10 ft).5.2 Impact Ins
11、trumentA lead shot- or steel shot-filledleather bag weighing 27.2 kg (60 lb) and equipped with aleather hoisting strap, both as described in Method E695.5.3 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
12、consisting ofcellular steel deck and a concrete topping. The cellular steeldeck shall be 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 A
13、STM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.21on Serviceability.Current edition approved April 1, 2011. Published May 2011. Originallyapproved in 1980. Last previous edition approved in 2005 as E760 92 (2005).DOI: 10.1520/E0760-92R11.2For referen
14、ced 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 International, 100 Barr Harbor Drive, PO Box C700, West C
15、onshohocken, PA 19428-2959, United States.steel fluted top section and 1.2-mm (0.048-in.) galvanized steelflat bottom 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 thes
16、teel decking.6.3 This test method requires the application of SFRM inaccordance with manufacturers published instructions. 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 s
17、imilar tothe density tested and reported during the Test Methods E119and Test Method E84 fire exposure tests or as required by thesponsor of the test.6.5 Determine the density and thickness of each of thelaboratory-prepared specimens. Report in accordance with TestMethods E605.7. Test Specimen7.1 La
18、boratory Tests:7.1.1 Apply the SFRM to the underside of the steel deck nosooner than seven days after the concrete 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
19、prepared specimen for a period of notless than one week at ambient temperature and humidityconditions (not less than 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
20、 supports with the SFRMas the lower surface and the concrete as the upper surface.8.2 Hoist the bag to a height of 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
21、 bag.9. Report9.1 Report the following information:9.1.1 A complete description of the overall specimen, in-cluding 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
22、 in kilograms per cubic metre (or pounds per cubicfoot).10. Precision and Bias10.1 No statement is made about either 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
23、.1 impact loading; sprayed fire-resistive material; steelfloor deckASTM 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
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26、 a fair hearing you shouldmake 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 th
27、is 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).E760 92 (2011)2
