ASTM_D_7379_-_D_7379M_-_08_2015e1.pdf

Designation:D7379/D7379M08(Reapproved 2015)1Standard Test Methods forStrength of Modified Bitumen Sheet Material Laps UsingCold Process Adhesive1This standard is issued under the fixed designation D7379/D7379M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEUnits information was editorially corrected in January 2015.1.Scope1.1 These test methods cover the procedure for samplingand testing the strength of laps formed with adhesive used withpolymer-modified bituminous sheet materials.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.Combiningvalues from the two systems may result in non-conformancewith the standard.1.3 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:2D140 Practice for Sampling Bituminous MaterialsD146 Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing andWaterproofingD5147 Test Methods for Sampling and Testing ModifiedBituminous Sheet Material3.Significance and Use3.1 These tests are useful in sampling and testing combina-tions of modified bitumen sheet materials used with coldapplied adhesives.4.Sampling4.1 From each shipment or fraction thereof,select at randoma number of modified bitumen rolls and containers of adhesivein accordance with the following.Determine the number ofadhesive containers to be sampled in accordance with PracticeD140.Determine the number of rolls to be selected inaccordance with Section 3,Sampling,of Test Methods D146.5.Conditioning5.1 Condition test materials for a minimum of 4 h at 23 62C 73.4 6 3.6F and 50 6 5%relative humidity beforepreparing specimens for testing.6.Lap T-Peel Strength6.1 This test method covers the determination of the T-peelstrength of polymer-modified bituminous sheet material andcold applied adhesive combinations.6.1.1 Modified Bitumen Samples for TestingSamples fortesting shall consist of two 140 by 152 mm 5.5 by 6 in.testpanels of modified bitumen,bonded with the adhesive to betested,and cut into 25 mm 1 in.specimens as shown in Fig.1.Cut the modified bitumen sheet materials and mate the sidesto be bonded facing each other.6.1.2 Sides to be bonded shall be prepared in the samefashion as a field seam is constructed with the bottom side ofa top panel bonded to the top side(selvage)of the bottom panelusing the adhesive to be tested.6.2 Stir the adhesive to be tested until it is uniform.Spread5.0 6 0.3 g of the adhesive evenly over the selvage portion ofa bottom panel.Place the top panel over the adhesive-coatedarea of the bottom panel(as shown in Fig.1)in the samemanner,as a field lap would be made.6.3 Roll the freshly prepared panel combination three timeswith a back-and-forth motion,taking care not to move thepanels during the rolling process.No downward pressure shallbe exerted on the roller by the operator.The roller shall beplaced in direct contact with the 3-in.wide cemented lapportion.The roller shall be 127 mm 5 in.6 5%wide,127mm 5 in.65%in diameter,and shall weigh 11.8 kg 26 lb65%.1These test methods are under the jurisdiction of ASTM Committee D08 onRoofing and Waterproofing and is the direct responsibility of Subcommittee D08.04on Felts,Fabrics and Bituminous Sheet Materials.Current edition approved Jan.1,2015.Published February 2015.Originallyapproved in 2008.Last previous edition approved in 2008 as D7379-08.DOI:10.1520/D7379_D7379M-08R15E01.2For 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 FIG.1 T-Peel Bonding Configuration for a Modified Bitumen LapD7379/D7379M 08(2015)12 6.4 ConditioningHeat condition completed modified bitu-men panels prior to peel testing in a ventilated,forced airconvection oven at 70 6 3C 158 6 5F for 7 days 6 2 h.Panels are to be placed in the oven within 24 h of preparation.6.4.1 After conditioning,allow panels to come to constanttemperature at 23 6 2C 73.4 6 3.6F and 50 6 5%humidity for 24 6 1 h prior to testing.6.5 SpecimensPrepare five die cut test specimens fromeach panel.Discard the outer 5 mm 0.13 in.of each panel toavoid any edge effects.Specimens shall be 25.4 6 0.2 mm 16 0.01 in.by 152