ASTM_E_2786_-_10_2015.pdf

Designation:E278610(Reapproved 2015)Standard Test Methods forMeasuring Expansion of Intumescent Materials Used inFirestop and Joint Systems1This standard is issued under the fixed designation E2786;the number immediately following the designation indicates the year oforiginal adoption 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.1.Scope1.1 These test methods determine,by measurement,theexpansion of intumescent materials used in firestop and jointsystems under specified conditions.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The text of these test methods references notes andfootnotes which provide explanatory material.These notes andfootnotes(excluding those in tables and figures)shall not beconsidered as requirements of the fire test response standard.1.4 This standard 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 ASTM Standards:2E176 Terminology of Fire StandardsE631 Terminology of Building Constructions3.Terminology3.1 DefinitionsDefinitions in the following standards willprevail for terms not defined in these test methods.3.1.1 For definitions of general terms used in these testmethods related to building construction,refer to TerminologyE631.3.1.2 For definitions of general terms used in these testmethods related to fire standards,refer to Terminology E176.3.2 Definitions of Terms Specific to This Standard:3.3 expansion,nan increase in the dimensions as the resultof heating.3.4 expansion factor,nthe ratio of the material heightbefore and after heating,under test conditions that allowexpansion only in the vertical direction.3.5 intumescent,adjcharacterized by swelling when ex-posed to high surface temperatures or flames.4.Summary of Test Method4.1 These test methods place a material of a specifiedthickness or volume into a specific device that is capable ofheating the material.4.2 After the material is heated,its dimensional or volumet-ric change is measured.4.3 Two test methods are provided,one using a test speci-men holder(Test Method A)and the other using a waterdisplacement method(Test Method B).4.4 Test Method A may be used for measuring expansion ofany material.4.5 Test Method B may be used for measuring expansion ofany material,except for those materials that are granular,thatare susceptible to absorbing paraffin in conditioned pre-expanded state or post-expanded state,or that are susceptible todamage or deformation in a post-expanded state.4.6 The test method used must be reported,as use ofdifferent test methods will result in different expansion factors.5.Significance and Use5.1 These test methods are intended to measure the materi-als expansion after heating.5.2 The test methods also provide a means to determine theexpansion factor.6.Apparatus6.1 Heating DeviceAn enclosed furnace or oven or simi-lar equipment capable of maintaining the temperature specifiedherein and large enough to contain the test specimen holder.6.2 Test Method ATest Specimen Holder Method:1These test methods are under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is the direct responsibility of Subcommittee E06.21on Serviceability.Current edition approved Jan.1,2015.Published January 2015.Originallyapproved in 2010.Last previous edition approved in 2010 as E278610.DOI:10.1520/E2786-10R15.2For referenced 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.2.1 Test Specimen HolderA Series 300 stainless steelassembly consisting of at least two cylinders contained in aframe into which the material is placed.Each cylinder shall benominally 5 in.(130 mm)high with a nominal 2 in.(50 mm)outside diameter.Fig.1 is an example of a test specimenholder.Wall thickness shall be nominal 0.08 in.(2 mm).6.2.2 Restrictor PlateA Series 300 stainless steel discwith a diameter of 0.01 to 0.015 in.(0.25 to 0.38 mm)less thanthat of the cylinder in 6.2.1 and with a mass of 1.14 oz/in2(5g/cm2),60.023 oz/in2(0.1 g/cm2).NOTE1For a Series 300 stainless steel,a qualifying restrictor platecan be made from solid bar stock with an O.D.of 1.82 in.(46.2 mm)anda thickness of 0.25 in.(6.5 mm)(see Fig.2).6.2.3 Steel rule die with the same width as the diameter ofthe cylinder in 6.2.1,+0.0 0.015 in.