1、Designation: D7274 06a (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 ca
2、se 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.1NOTE“BGM” was editorially changed to “PBGM” in February 2018.1. Scope1.1 This test method covers the
3、procedure for the 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
4、 of thesafety concerns, 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
5、 accor-dance with internationally 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.
6、1 ASTM Standards:2D4354 Practice 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 T
7、his Standard:3.1.1 prefabricated 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 inorganicm
8、aterial, used in admixture with solid 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 o
9、f mineral stabilizer. The amount of mineral 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
10、-cm3capacity, or equivalent.5.2 Analytical Balance, 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
11、 should becarried out under a fume hood, away from any 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 loca
12、tion is chosen on the side of the PBGM1This test method 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 e
13、dition approved in 2011 as D727406a (2011).DOI: 10.1520/D7274-06AR18E01.2For 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 AS
14、TM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box 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 theDevelopme
15、nt of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1with 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 spatul
16、a or knife, sample 5 6 1 g of bitumenfrom the PBGM, taking care of not scraping down to thereinforcing geotextile.7.4 Condition samples for a minimum of4hat236 3C(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 Wei
17、gh 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 device, place the crucib
18、le inthe muffle furnace set at 600 6 25 C (1110 6 45 F) for 60 65 min. Verify that the crucible is free of any black combustionresidue. If any is present, place the crucible in the furnace foran additional 30 6 5 min.8.6 Let the crucible and its contents cool in a dessicator for15 6 1 min.8.7 Weigh
19、the crucible to the nearest 0.001 g (C3).9. Calculation9.1 Calculate the mineral stabilizer content of the bitumen(SC) using the following equation:SC5C32 C1C22 C13100 (1)10. Report10.1 Report the following information:10.1.1 Complete identification of the material tested.10.1.2 Test temperature.10.
20、1.3 Any deviation of the specified test procedure, as wellas any possible incident.10.1.4 Specimen mineral stabilizer content (SC).11. Precision and Bias11.1 The precision and bias of this test method have notbeen established. Round-robin test should be conducted toestablish these values.12. Keyword
21、s12.1 bituminous; calcination; destructive; geomembranes;mineral stabilizers; PBGMsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the
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24、ave not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, 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 multip
25、le copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (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:/ 06a (2018)12
