1、Designation:D2643/D2643M08(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 adopti
2、on 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 specification
3、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;therefore,eachsystem sh
4、all 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-pr
5、iate 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 Sampling of Geosynthe
6、tics 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 and Related ProductsD514
7、7/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 Reinforced Geomembranes
8、D6455 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 terms related togeosynthet
9、ics,refer to Terminology D4439.3.2 Definitions:3.2.1prefabricated 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.3.2.2 mineral stabilizer,na fin
10、e,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:3.3.1selvage,nthe edge portion of a prefabricatedbituminous geomembrane that is parallel to the machinedirection.4.Classification
11、s4.1 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 specification,regardless of their type i
12、ndicated 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 Subcommittee D35.10 on Geomem-branes.Current editio
13、n 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 at serviceastm.org.For Annual Book of ASTMStand
14、ards 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 4.2.1 Grade 1For installation at ambient temperatures of5C 40F and above.4.2.2 Grade 2For installation
15、 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 bitumen shall consist of oxidized or elastomericmodified asphal
16、t 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 Requirements6.1 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.NOTE1Although prefabricated bituminous geomembranes are manu-fa
