ASTM_D_4886_-_10.pdf

Designation:D488610Standard Test Method forAbrasion Resistance of Geotextiles(Sand Paper/SlidingBlock Method)1This standard is issued under the fixed designation D4886;the number immediately following the designation indicates the year oforiginal adoption or,in the case 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.1.Scope1.1 This test method covers the determination of resistanceof geotextiles to abrasion using an abrasion tester.This testmethod at this point has only been evaluated for geotextilesnot geomembranes,grids,etc.Therefore,the test method isdesignated for geotextiles,not geosynthetics,as all productsmay not lend themselves to this test method for abrasion.Iflater developments indicate a wider scope for this test method,appropriate changes will be made.1.2 The values stated in SI units are to be regarded asstandard.The values given in inch-pound units are provided asinformation only.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D123 Terminology Relating to TextilesD1776 Practice for Conditioning and Testing TextilesD4354 Practice for Sampling of Geosynthetics and RolledErosion Control Products(RECPs)for TestingD4439 Terminology for GeosyntheticsD5035 Test Method for Breaking Force and Elongation ofTextile Fabrics(Strip Method)3.Terminology3.1 For definitions of other terms used in this test method,refer to Terminologies D123 or D4439.3.2 Definitions:3.2.1 abrasion,nthe wearing away of any part of amaterial by rubbing against another surface.D1233.2.2 loss in breaking force,npercent comparison ofbreaking force before and after abrasion.4.Summary of Test Method4.1 A test specimen,mounted on a stationary platform isrubbed by an abradant with specified surface characteristics.Under controlled conditions of pressure and abrasive action,the abradant is rubbed on a horizontal axis using a uniaxionalmotion.Resistance to abrasions is expressed as a percentage oforiginal strength before abrading.5.Significance and Use5.1 This test method may be used for acceptance testing ofcommercial shipments of geotextiles,but caution is advisedsince information on the precision of the test is lacking.Comparative testing as directed in 5.1.1 may be advisable.5.1.1 In case of a dispute arising from differences inreported test results when using this test method,the purchaserand the supplier should conduct comparative tests to determineif there is a statistical bias between their laboratories.Compe-tent statistical assistance is recommended for the investigationof bias.As a minimum,the two parties should take a group oftest specimens that are as homogeneous as possible and that arefrom a lot of material of the type in question.The testspecimens should then be randomly assigned in equal numbersto each laboratory for testing.The average results from the twolaboratories should be compared using Students t-test forunpaired data and an acceptable probability level chosen by thetwo parties before the testing is begun.If a bias is found,eitherits cause must be found and corrected or the purchaser and thesupplier must agree to interpret future test results in light of theknown bias.5.2 The resistance of abrasion is also greatly affected by theconditions of the tests,such as the nature of abradant,variableaction of the abradant over the area of specimen abraded,thetension of the specimen,the pressure between the specimenand abradant,and the dimensional changes in the specimens.5.3 The resistance of geotextile materials to abrasion asmeasured on a testing machine in the laboratory is generallyonly one of several factors contributing to performance or1This test method is under the jurisdiction of ASTM Committee D35 onGeosynthetics and is the direct responsibility of Subcommittee D35.02 on Endur-ance Properties.Current edition approved Oct.1,2010.Published October 2010.Originallyapproved in 1988.Last previous edition approved in 2002 as D448688(2002).DOI:10.1520/D4886-10.2For 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 ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 durability as experienced in the actual use of the material.While“abrasion resistance”and“durability”are frequentlyrelated,the relationship varies with different end uses,anddifferent factors may be necessary in any calculation ofpredicted durability from specific abrasion data.Laboratorytests may be reliable as an