1、Designation:D2643/D2643M21Standard 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 adoption or,in the case
2、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.1.Scope1.1 This specification covers prefabricated bituminousgeomembranes intended to provide a continuous,exp
3、osedlining 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 are not necessarily exact equivalents;therefore,toensure conformance with the standard,each system shall beused independently of the
4、 other,and values from the twosystems shall not be combined.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-priate safety,health,and environmental practices and deter-mine t
5、he applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issu
6、ed by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1204 Test Method for Linear Dimensional Changes ofNonrigid Thermoplastic Sheeting or Film at ElevatedTemperatureD4354 Practice for Sampling of Geosynthetics and RolledErosion Contro
7、l Products(RECPs)for TestingD4439 Terminology for GeosyntheticsD4798/D4798M Practice for Accelerated Weathering TestConditions and Procedures for Bituminous Materials(Xenon-Arc Method)D4833/D4833M Test Method for Index Puncture Resistanceof Geomembranes and Related ProductsD5147/D5147M Test Methods
8、for Sampling and TestingModified Bituminous Sheet MaterialD5199 Test Method for Measuring the Nominal Thicknessof GeosyntheticsD5261 Test Method for Measuring Mass per Unit Area ofGeotextilesD5884/D5884M Test Method for Determining TearingStrength of Internally Reinforced GeomembranesD6455 Guide for
9、 the Selection of Test Methods for Prefab-ricated Bituminous Geomembranes(PBGMs)D7275 Test Method for Tensile Properties of BituminousGeomembranes(BGMs)E96/E96M Test Methods for Water Vapor Transmission ofMaterials3.Terminology3.1 DefinitionsFor definitions of terms related togeosynthetics,refer to
10、Terminology D4439.3.2 Definitions of Terms Specific to This Standard:3.2.1 mineral stabilizer,na fine,water-insoluble inorganicmaterial,used as a filler material in the bitumen of a prefab-ricated bituminous geomembrane.3.2.2 prefabricated bituminous geomembrane,na mate-rial fabricated in a plant an
11、d consisting principally of ageotextile saturated and coated with an oxidized or an elasto-meric modified bitumen blend incorporating a filler.3.2.3 selvage,nthe edge portion of a prefabricated bitu-minous geomembrane that is parallel to the machine direction.4.Classifications4.1 Prefabricated bitum
12、inous 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 indicated in 4.1,shallals
13、o 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 D35.06 on Geosyn-thetic Specifications.Current edition approve
14、d Sept.1,2021.Published September 2021.Originallyapproved in 1967.Last previous edition approved in 2019 as D2643/D2643M 08(2019).DOI:10.1520/D2643_D2643M-21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMS
15、tandards 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 StatesThis international standard was developed in accordance with internationally recognized principles o
16、n standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.14.2.1 Grade 1For installation at ambient temperatures of5 C 40 F and above.4.2.2 Grade 2For installation at ambient temperatures of25 C 13 F and above.5.Materials and Manufacture5.1 The prefabricated bituminous geomembranes shall con-sist of a geotextile,impregnated and coated with bi
