1、Designation: D2643/D2643M 08 (Reapproved 2013)1Standard Specification forPrefabricated Bituminous Geomembrane Used as Canal andDitch Liner (Exposed Type)1This standard is issued under the fixed designation D2643/D2643M; the number immediately following the designation indicates theyear of original a
2、doption 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 June 2013.1. Scope1.1 This sp
3、ecification covers prefabricated bituminousgeomembranes intended to provide a continuous, exposedlining for canals and ditches.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; therefor
4、e, 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 t
5、o establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1204 Test Method for Linear Dimensional Changes ofNonrigid Thermoplastic Sheeting or Film at ElevatedTemperatureD4354 Practice for
6、Sampling of Geosynthetics and RolledErosion Control Products(RECPs) for TestingD4439 Terminology for GeosyntheticsD4798/D4798M Practice for Accelerated Weathering TestConditions and Procedures for Bituminous Materials(Xenon-Arc Method)D4833 Test Method for Index Puncture Resistance ofGeomembranes an
7、d Related ProductsD5147/D5147M Test Methods for Sampling and TestingModified Bituminous Sheet MaterialD5199 Test Method for Measuring the Nominal Thicknessof GeosyntheticsD5261 Test Method for Measuring Mass per Unit Area ofGeotextilesD5884 Test Method for Determining Tearing Strength ofInternally R
8、einforced GeomembranesD6455 Guide for the Selection of Test Methods for Prefab-ricated Bituminous Geomembranes (PBGM)D7275 Test Method for Tensile Properties of BituminousGeomembranes (BGM)E96/E96M Test Methods for Water Vapor Transmission ofMaterials3. Terminology3.1 DefinitionsFor definitions of t
9、erms related togeosynthetics, refer to Terminology D4439.3.2 Definitions:3.2.1 prefabricated bituminous geomembrane, na mate-rial fabricated in a plant and consisting principally of ageotextile saturated and coated with an oxidized or an elasto-meric modified bitumen blend incorporating a filler.3.2
10、.2 mineral stabilizer, na fine, water-insoluble inorganicmaterial, used as a filler material in the bitumen of a prefab-ricated bituminous geomembrane.3.3 Definitions of Terms Specific to This Standard:3.3.1 selvage, nthe edge portion of a prefabricatedbituminous geomembrane that is parallel to the
11、machinedirection.4. Classifications4.1 Prefabricated bituminous geomembranes covered bythis specification shall be classified as Type I, Type II, and TypeIII. Distinction between those types is related to the require-ments found in Table 1.4.2 Prefabricated bituminous geomembranes covered bythis spe
12、cification, regardless of their type indicated in 4.1, shallalso be classified using the following grades, essentiallygoverned by their minimal installation temperature:1This specification is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommitte
13、e D35.10 on Geomem-branes.Current edition approved May 1, 2013. Published June 2013. Originallyapproved in 1967. Last previous edition approved in 2008 as D2643 08. DOI:10.1520/D2643_D2643M-08R13E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service
14、 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 States14.2.1 Grade 1For installation at ambient tempera
15、tures of5C 40F and above.4.2.2 Grade 2For installation at ambient temperatures of-25C -13F and above.5. Materials and Manufacture5.1 The prefabricated bituminous geomembranes shall con-sist of a geotextile, impregnated and coated with bitumen. Theyshall be packaged in the form of rolls.5.2 The bitum
16、en shall consist of oxidized or elastomericmodified asphalt incorporating a mineral stabilizer.5.3 Both faces of the prefabricated bituminous geomem-branes shall be covered with a material that will prevent therolls from sticking together during storage and shipment.6. Physical Properties and Requir
17、ements6.1 The prefabricated bituminous geomembranes shall con-form to the requirements prescribed in Table 1. Testing shall beaccomplished in accordance with the test methods indicated inthe table.NOTE 1Although prefabricated bituminous geomembranes are manu-factured in a plant, they have no factory
18、 seams. Consequently, factoryseam testing is not applicable to prefabricated bituminous geomembranes.6.2 Low Temperature FlexibilityThe prefabricated bitumi-nous geomembranes shall pass the low temperature flexibilitytest, when measured according to Test Method D5147/D5147M, Section 11. Testing shal
19、l be accomplished in bothmachine and cross-machine directions:6.2.1 At 5C 40F for Grade 1.6.2.2 At -25C -13F for Grade 2.6.3 Low Temperature Flexibility After AcceleratedWeatheringThe low temperature flexibility test described in6.2 shall also be accomplished, in both machine and cross-machine direc
20、tions, after an exposure of 2000 hours as per testmethod D4798/D4798M, cycle A. Test specimens shall be cutto the size prescribed in Test Method D5147/D5147M prior toexposure: 25 6 2 mm 1.00 6 0.05 in. wide by 150 6 2mm6.00 6 0.05 in. long. If two or more specimens are mountedon a single specimen ho
21、lder of the Xenon-Arc weatheringchamber, all tested specimens shall have their full width and atleast 100 mm 5 in. in length exposed. The prefabricatedbituminous geomembranes shall pass the low temperatureflexibility test after accelerated weathering:6.3.1 At 15C 59F for Grade 1.6.3.2 At -15C 5F for
22、 Grade 2.6.4 For a complete list of test methods applicable toprefabricated bituminous geomembranes, refer to GuideD6455.7. Workmanship, Finish, and Appearance7.1 Both faces of the prefabricated bituminous geomem-branes shall be uniform in finish. The bitumen shall be uniformover the entire area and
23、 up to the edges of the sheet. Thematerial or treatment to prevent sticking shall be applieduniformly, except for the selvage area.7.2 There shall be no voids in the bitumen or unsaturatedspots in the geotextile.7.3 The prefabricated bituminous geomembranes shall befree of visible defects such as ho
24、les, ragged or untrue edges,breaks, cracks, protuberances, and indentations.8. Sampling and Test Methods8.1 For conformance evaluation, sampling shall be con-ducted according to D4354.9. Packaging and Package Marking9.1 Unless otherwise agreed upon between the supplier andpurchaser, each roll shall
25、be covered with a wrapping materialfor protection from damage due to shipment, water, sunlight, orcontaminants while being stored or handled.9.2 Each roll shall also include at least one label identifyingthe manufacturer, style and/or commercial designation, uniqueroll identification (such as roll n
26、umber), length and width of theroll, as well as a statement regarding conformance to theappropriate type and grade of this standard specification.TABLE 1 Requirements for Bituminous Geomembranes Used as Exposed Lining for Canals and DitchesProperty Standard Type I Type II Type IIIThickness, min D519
27、9 3.3 mm0.130 in.3.8 mm0.150 in.4.5 mm0.175 in.Mass per Unit Area, min D5261 3.5 kg/m20.72 lb/ft24.0 kg/m20.82 lb/ft25.0 kg/m21.02 lb/ft2Tensile Strength at break,machine and cross-machine directions, minD7275 8 kN/m45.7 lbf/in.12 kN/m68.5 lbf/in.16 kN/m91.4 lbf/in.Elongation at break,machine and cr
28、oss-machine directions, minD7275 50 % 50 % 50 %Tear Strength,machine and cross-machine directions, minD5884 500 N112 lbf550 N124 lbf600 N135 lbfIndex Puncture Resistance, min D4833 350 N79 lbf450 N101 lbf550 N124 lbfLow Temperature Flexibility before weathering,machine and cross-machine directionsD5
29、147/D5147MSection 11Grade 1 must pass 5C 40FGrade 2 must pass 25C 13FLow Temperature Flexibility after weathering,machine and cross-machine directionsD5147/D5147MSection 11Grade 1 must pass 15C 59FGrade 2 must pass 15C 5FDimensional Stability,machine and cross-machine directions, maxD1204 0.5 %Water
30、 Vapor Permeance E96/E96M, Method B 5.7 ng/Pasm220.1 permD2643/D2643M 08 (2013)1210. Keywords10.1 bitumen; canals; ditches; exposed lining; geomem-brane; geotextile; PBGM; prefabricated bituminous geomem-braneASTM International takes no position respecting the validity of any patent rights asserted
31、in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the
32、responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive ca
33、reful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have 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 Internatio
34、nal, 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 610-832-9585 (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 ASTM website (www.astm.org/COPYRIGHT/).D2643/D2643M 08 (2013)13
