1、Designation: D7379/D7379M 08 (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 adoptio
2、n 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
3、 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
4、equivalents; therefore, eachsystem shall be sued 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 us
5、er 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 Fel
6、ts 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 Fro
7、m 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
8、 Section 3, Sampling, of Test Methods D146.5. Conditioning5.1 Condition test materials for a minimum of4hat2362C 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-modif
9、ied 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.
10、 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 test
11、ed.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 freshl
12、y 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 shal
13、l 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.Curren
14、t 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 An
15、nual 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 States1FIG. 1 T-Peel Bonding Configuration for a Modified Bitumen LapD7379/D7379M
16、08 (2015)126.4 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 2h.Panels are to be placed in the oven within 24 h of preparation.6.4.1 After conditioning, allow panels to come to constantt
17、emperature 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 6 2mm66 0.05 in. long. Spec
18、imens fortesting shall incorporate a 25.4 6 0.2 mm 1 6 0.01 in. by 766 0.6 mm 3.0 6 0.03 in. bonded area, as shown in Fig. 1.6.6 ProcedureTest each specimen in accordance with TestMethods D5147, Section 6. Set the edges of the clamps apart25 6 0.2 mm 1 6 0.01 in., and maintain a rate of separationof
19、 51 6 1.5 mm/min. 2.0 6 0.06 in./min. Specimen peelstrength shall be measured over the interval between 25 6 0.2mm 1 6 0.01 in. and 152 6 1 mm 6.0 6 0.05 in. ofseparation.6.7 PrecisionThe following data should be used for judg-ing the acceptability of results (95 % probability) on samplesfrom the sa
20、me lot from the same supplier.6.7.1 Repeatability and ReproducibilityFor materials inthe peak peel strength range of 1751 to 2276 N/m 10 to 13lbf/in., Sr, the repeatability standard deviation, averaged 274N/m 1.57 lbf/in. The 95 % repeatability range was 6550N/m 3.14 lbf/in. or 27 % around the true
21、average, 2031 N/m11.6 lbf/in. The reproducibility standard deviation, SR, aver-aged = 431 N/m 2.46 lbf/in. The 95 % reproducibility rangewas 6862 N/m 4.92 lbf/in. or 42 % around the true average.6.7.2 Repeatability and ReproducibilityFor materials inthe average peel strength range of 1436 to 1716 N/
22、m 8.2 to 9.8lbf/in., Sr, the repeatability standard deviation, averaged 144N/m 0.82 lbf/in. The 95 % repeatability range was 6364N/m 2.08 lbf/in. or 22.5 % around the true average, 1611 N/m9.2 lbf/in. The reproducibility standard deviation, SR, aver-aged = 352 N/m 2.01 lbf/in. The 95 % reproducibili
23、ty rangewas 6704 N/m 4.02 lbf/in. or 42 % around the true averageof 1615 N/m 9.22 lbf/in.7. Lap Shear Strength7.1 This test method covers the determination of the shearstrength of adhesives used with polymer modified bituminoussheet materials.7.1.1 Panels for TestPrepare pre-cut test panels, as show
24、nin Fig. 2, by mating the sides to be bonded facing each other.Sides to be bonded shall be prepared in the same fashion as afield seam is constructed; that is, the bottom side of a top panelis bonded to the selvage portion of a bottom panel with theadhesive to be tested.7.2 Prepare specimens for tes
25、t as in 6.2 through 6.3 aboveexcept that shear test specimens shall be constructed as shownin Fig. 2.7.3 Condition as in 6.4.7.4 SpecimensPrepare five die cut test specimens fromeach panel. Discard the outer 5 mm 0.13 in. of each panel.Specimens shall be 25 6 0.2 mm 1 6 0.01 in. by 152 6 2mm 6.0 6 0
26、.05 in. long. Specimens for test shall incorporatea 25.4 6 0.2 mm 1 6 0.01 in. by 76 6 0.6 mm 3 6 0.03 in.bonded area, as shown in Fig. 2.7.5 ProcedureAfter specimens have been heat condi-tioned for the specified time, test each specimen in accordancewith Test Methods D5147, Section 6. Set the edges
27、 of theclamps apart 82.5 6 0.5 mm 3.25 6 0.03 in., and maintain arate of separation of 51 6 2 mm/min. 2.0 6 0.06 in./min.Specimen shear strength shall be measured until sampleseparation is complete.7.6 Precision and BiasThe following data should be usedfor judging the acceptability of peak peel and
28、average peelstrength results with a 95 % probability.7.6.1 Repeatability and ReproducibilityFor materials inthe peak shear strength range of 53.04 to 71.69 N/m 46.99 to63.51 lbf/in., Sr, the repeatability standard deviation, averaged8.02 N/m 7.10 lbf/in. The 95 % repeatability range was616.04 N/m 14
29、.21 lbf/in. or 25.7 % around the true average,62.36 N/m 55.24 lbf/in. The reproducibility standarddeviation, SR, averaged = 18.19 N/m 16.11 lbf/in. The 95 %reproducibility range was 641.08 N/m 36.39 lbf/in. or 74 %around the true average of 55.24.8. Report8.1 Report the peak and average peel strengt
30、h and the peakshear strength values in N/m lbf/in. for each specimen, andthe average of specimens for each combination of adhesive andmembrane tested.9. Keywords9.1 cold process adhesive; lap; modified bituminous sheetmaterial; SBS; shear strength; T-peel strengthD7379/D7379M 08 (2015)13ASTM Interna
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34、rds, 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 this standard may be obtained by contacting ASTM at the aboveaddress or at 610-83
35、2-9585 (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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 2 Shear Strength Bonding Configuration for a Modified Bitumen LapD7379/D7379M 08 (2015)14
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