1、Designation:D727406a(Reapproved 2018)1Standard Test Method forMineral Stabilizer Content of Prefabricated BituminousGeomembranes(PBGMs)1This standard is issued under the fixed designation D7274;the number immediately following the designation indicates the year oforiginal adoption or,in the case of
2、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.1NOTE“BGM”was editorially changed to“PBGM”in February 2018.1.Scope1.1 This test method covers the procedure for t
3、he determi-nation of mineral stabilizer content in prefabricated bituminousgeomembranes(PBGMs)by calcination.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety conc
4、erns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with inter
5、nationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D4354 Pra
6、ctice for Sampling of Geosynthetics and RolledErosion Control Products(RECPs)for TestingD4439 Terminology for GeosyntheticsD6455 Guide for the Selection of Test Methods for Prefab-ricated Bituminous Geomembranes(PBGMs)3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 prefabricate
7、d bituminous geomembrane(PBGM),na material fabricated in a plant and consisting principally ofnonwoven polyester textile,impregnated by a blend of oxi-dized or polymer-modified bitumen incorporating filler.3.1.2 mineral stabilizer,na fine,water-insoluble inorganicmaterial,used in admixture with soli
8、d or semisolid bituminousmaterials.3.2 For definitions of other terms used in this test method,refer to Terminology D4439.4.Significance and Use4.1 Bituminous geomembranes,whether made from oxi-dized or polymer-modified bitumen,may contain a significantamount of mineral stabilizer.The amount of mine
9、ral stabilizerused in a bituminous geomembrane has an effect on severalphysical properties,including but not limited to coldtemperature,flexibility,and asphalt penetration(see GuideD6455 for a list of PBGM properites).5.Apparatus5.1 Porcelain Crucible,30-cm3capacity,or equivalent.5.2 Analytical Bala
10、nce,capable of weighing to within60.001 g.5.3 Bunsen Burner.5.4 Muffle Furnace,capable of maintaining a temperature of600 6 25 C(1110 6 45 F).6.Hazards6.1 Calcination of PBGM involves the use of open flameand will produce black smoke.This procedure should becarried out under a fume hood,away from an
11、y flammablematerial.7.Sampling and Conditioning7.1 Sampling shall be conducted according to PracticeD4354.7.2 Remove any surface material from the sample at thelocation where the test specimen will be taken.This operationwill be easier when location is chosen on the side of the PBGM1This test method
12、 is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.10 on Geomem-branes.Current edition approved Feb.1,2018.Published February 2018.Originallyapproved in 2006.Last previous edition approved in 2011 as D727406a(2011).DOI:10.1520/D7274-
13、06AR18E01.2For 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 Bo
14、x C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the W
15、orld Trade Organization Technical Barriers to Trade(TBT)Committee.1 with film surfacing or on the film-covered lap.In that case,thePBGM may be cooled to about 30 C for 2 h and the film maybe peeled off.7.3 Using a hot spatula or knife,sample 5 6 1 g of bitumenfrom the PBGM,taking care of not scrapin
16、g down to thereinforcing geotextile.7.4 Condition samples for a minimum of 4 h at 23 6 3 C(73.4 6 5.4 F)and 50 6 5%relative humidity before testing.8.Procedure8.1 Preheat the muffle furnace at 600 6 25 C(1110 645 F).8.2 Weigh the porcelain crucible to the nearest 0.001 g(C1).8.3 Place the sample obtained in 7.3 in the crucible andweigh to the nearest 0.001 g(C2).8.4 Under the fume hood,place the crucible over theBunsen burner flame until combustion is completed.8.5 Using an adequate holding devi
