ASTM_D_5818_-_11.pdf

Designation:D581811Standard Practice forExposure and Retrieval of Samples to Evaluate InstallationDamage of Geosynthetics1This standard is issued under the fixed designation D5818;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 practice covers standardized procedures for obtain-ing samples of geosynthetics from a test section for use inassessment of the effects of damage immediately after instal-lation caused only by the installation techniques.The assess-ment may include physical testing.This practice is applicableto any geosynthetic.1.2 This practice is limited to full-scale test sections,anddoes not address laboratory modeling of field conditions.Thispractice does not address which test method(s)to use forquantifying installation damage.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:2D4439 Terminology for GeosyntheticsD4873 Guide for Identification,Storage,and Handling ofGeosynthetic Rolls and Samples3.Terminology3.1 Definitions:3.1.1 geosynthetic,na planar product 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.3.1.2 sample,n(1)a portion of material that is taken fortesting or for record purposes;(2)a group of specimens used,or of observations made,which provide information that can beused for making statistical inferences about the population(s)from which the specimens are drawn.3.1.3 test section,na distinct area of actual or simulatedfull-scale construction.3.1.4 For definitions of other geosynthetic terms used in thispractice,refer to Terminology D4439.4.Summary of Practice4.1 Damage to geosynthetics from installation operationsmay be quantified by evaluating specimens from a sample(s)exhumed from a full-scale installation.The sample(s)shouldbe installed using project specific procedures and materials.When project specific materials and/or procedures are un-known,generally accepted,representative materials and pro-cedures,should be used and thoroughly documented andreported.Addressed within this practice are:amount of geo-synthetic sample(s)to install procedures for installing thegeosynthetic sample(s);procedures for exhuming the geosyn-thetic sample(s);procedure for obtaining control sample(s);and report preparation guidelines.The sample(s)should beretrieved immediately after installation to minimize potentialaging of the geosynthetic.Comparison of test results onexhumed and control specimens may be used to assess effectsof installation.Tests to perform are not addressed herein,andwill vary with the type and function of geosynthetic and projectrequirements.5.Significance and Use5.1 The ability to maintain design function(for example,reinforcement,separation,barrier,etc.)or design properties(for example,tensile strength,chemical resistance,etc.),orboth,of a geosynthetic may be affected by damage to thephysical structure of the geosynthetic due to the rigors of fieldinstallation.The effect of damage may be assessed by analyz-ing specimens cut from sample(s)retrieved after installation ina representative test section.Analysis may be performed withvisual examination or laboratory testing of specimens from thecontrol sample(s),and from the exhumed sample(s).5.2 A uniform practice for installing and retrieving repre-sentative sample(s)from a test section is needed to assessinstallation damage using project specific or generally ac-cepted,representative materials and procedures.Damage of a1This practice is under the jurisdiction of ASTM Committee D35 on Geosyn-thetics and is the direct responsibility of Subcommittee D35.01 on MechanicalProperties.Current edition approved Feb.1,2011.Published April 2011.Originallyapproved in 1995.Last previous edition approved in 2006 as D5818 06.DOI:10.1520/D5818-11.2For 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 specific grade and type of geosynthetic under specific installa-tion procedures may be assessed with sample(s)exhumed froma full-scale test section.6.Procedure6.1 ObjectiveGeosynthetic and soil placement techniquesshall model the methods anticipated during construction butmay also be designed to model hypothetical conditi