1、Designation:D621397(Reapproved 2009)Standard Practice forTests to Evaluate the Chemical Resistance of Geogrids toLiquids1This standard is issued under the fixed designation D6213;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the ye
2、ar 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.1.Scope1.1 This practice covers the procedures for testing ofgeogrids for chemical resistance to liquids.1.2 This practice descr
3、ibes methods for measuring changesin physical and mechanical properties caused by immersion intest solutions that may be representative of anticipated end-useconditions.1.3 This practice describes procedures for required andrecommended testing of geogrids.1.4 Evaluation or interpretation of test dat
4、a is beyond thescope of this practice.1.5 This practice is intended to be used in conjunction withD5322,or D5496,or both.The scope of this practice is limitedto testing and reporting procedures for unexposed and exposedgeogrid coupons.1.6 This standard does not purport to address all of thesafety co
5、ncerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary statements are given in Section 7.2.Referenced Documents2.1
6、 ASTM Standards:2D16 Terminology for Paint,Related Coatings,Materials,andApplicationsD76 Specification for Tensile Testing Machines for TextilesD123 Terminology Relating to TextilesD883 Terminology Relating to PlasticsD1238 Test Method for Melt Flow Rates of Thermoplasticsby Extrusion PlastometerD16
7、95 Terminology of Cellulose and Cellulose DerivativesD4439 Terminology for GeosyntheticsD4595 Test Method for Tensile Properties of Geotextiles bythe Wide-Width Strip MethodD4603 Test Method for Determining Inherent Viscosity ofPoly(Ethylene Terephthalate)(PET)by Glass CapillaryViscometerD5322 Pract
8、ice for Laboratory Immersion Procedures forEvaluating the Chemical Resistance of Geosynthetics toLiquidsD5496 Practice for In Field Immersion Testing of Geosyn-theticsD5747 Practice for Tests to Evaluate the Chemical Resis-tance of Geomembranes to LiquidsE375 Definitions of Terms Relating to Resinog
9、raphy(With-drawn 1992)33.Terminology3.1 Definitions:3.1.1 chemical resistance,nfor geosynthetics,the extentto which a material or product retains its original physical andchemical characteristics as a function of immersion in,orcontact with,a foreign substance.(D5747,D35)3.1.2 coating,na liquid,liqu
10、efiable or mastic compositionthat is converted to a solid protected,decorative,or functionaladherent film after application as a thin layer.(D16,D01)3.1.3 coupon,na portion of a material or laboratorysample,from which multiple specimens can be taken fortesting.(D5747,D35)3.1.4 composite,na material
11、made up of distinct partswhich contribute,either proportionately,or synergistically,tothe properties of the combination.(E375,D20)3.1.5 geogrid,na reinforcing geosynthetic comprised ofintegrally connected elements with in-plane apertures betweenelements.(D4439,D35)3.1.6 geosynthetic,na planar produc
12、t manufactured frompolymeric material used with soil,rock,earth,or other geo-technical engineering related material as an integral part of aman made project,structure,or system.(D4439,D35)1This practice is under the jurisdiction of ASTM Committee D35 on Geosyn-thetics and is the direct responsibilit
13、y of Subcommittee D35.02 on EnduranceProperties.Current edition approved June 1,2009.Published July 2009.Originally approvedin 1997.Last previous edition approved in 2003 as D6213-97(2003).DOI:10.1520/D6213-97R09.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Custo
14、mer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West C
15、onshohocken,PA 19428-2959.United States1 3.1.7 inherent viscositythe quotient of the natural loga-rithm of relative viscosity by the concentration,that is in rel/c.(D1695,D01)3.1.8 integral,adjin geosynthetics,forming a necessarypart of the whole;a constituent.(D4439,D35)3.1.9 relative viscositythe
16、ratio of the viscosity of asolution to that of the pure solvent.(D1695,D01)3.1.10 melt index,nthe flow rate of PE material whenmeasured in accordance with Test Method D1238.3.1.11 polyester,na polymer in which the repeated struc-tural unit in the chain is of the ester type.(D883,D20)3.1.12 polyolefin,na polymer prepared by the polymer-ization of an olefin(s)as the sole monomer(s).(D883,D20)3.1.13 sample,na portion of a lot of material that is takenfor incubation,testing,or for record purposes.(D
