ASTM E760-92(R2020) pdf free download
ASTM E760-92(R2020) pdf free download.Standard Test Method for Effect of Impact on Bonding of Sprayed Fire-Resistive Material Applied to Structural Members
1. Scope
1.1 This test method covers a procedure for determining the effect ofimpact loading on the bonding ofsprayed fire-resistive material (SFRM) applied to the underside of steel floor deck. These materials include sprayed fibrous and cementitious materials applied directly in contact with the structural mem- bers. The test method is applicable only to laboratory proce- dures. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory 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 the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards: 2 E84 Test Method for Surface Burning Characteristics of Building Materials E119 Test Methods for Fire Tests of Building Construction and Materials E605/E605M Test Methods for Thickness and Density of Sprayed Fire-Resistive Material (SFRM) Applied to Structural Members E695 Test Method of Measuring Relative Resistance of Wall, Floor, and Roof Construction to Impact Loading
3. Summary of Test Method
3.1 In this test method, a cellular steel deck with a concrete topping sprayed with fire-resistive material is subjected to a leather bag drop impact while supported horizontally at its ends.
4. Significance and Use
4.1 The intent of this test method is to determine a property of SFRM that may be used to provide an indication of its in-place serviceability. Satisfactory performance of SFRM applied to structural members and assemblies depends upon its ability to withstand the various influences that may occur during construction and during the life of the structure, as well as upon its satisfactory performance under fire conditions. 4.2 The test method measures the behavior of SFRM when the floor construction to which it is applied is subjected to shock loading and evaluates adhesion and resistance to spalling, cracking, and delamination. It is an indication of the ability of SFRM to remain in place and resist removal during anticipated service conditions.
5. Apparatus
5.1 Supports—Rigid 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 Instrument—A lead shot- or steel shot-filled leather bag weighing 27.2 kg [60 lb] and equipped with a leather hoisting strap, both as described in Test Method E695. 5.3 Rule—To measure the height of drop (1.2 m [4 ft]) with an accuracy of 12.8 mm [ 1 ⁄ 2 in.].
6. Materials
6.1 The test specimen shall be a deck assembly consisting of cellular steel deck and a concrete topping. The cellular steel deck shall be of the noncomposite type, nominal 40 mm [1 1 ⁄ 2 in.] deep, 600 mm [24 in.] wide, by 3600 mm [2 ft] long, consisting of a 1.5 mm [0.060 in.] thick galvanized or painted steel fluted top section and 1.2 mm [0.048 in.] galvanized steel flat 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], and 64 mm [2 1 ⁄ 2 in.] deep as measured from the top plane to the steel decking. 6.3 This test method requires the application of SFRM in accordance with manufacturers’ published instructions. The apparatus, materials, and procedures used to apply the SFRM for this test shall be representative of application in the field. 6.4 The density of the prepared sample shall be similar to the density tested and reported during the Test Methods E119 and Test Method E84 fire exposure tests or as required by the sponsor of the test. 6.5 Determine the density and thickness of each of the laboratory-prepared specimens. Report in accordance with Test Methods E605/E605M.
