ASTM_D_5858_-_96_2015.pdf

Designation:D585896(Reapproved 2015)Standard Guide forCalculating In Situ Equivalent Elastic Moduli of PavementMaterials Using Layered Elastic Theory1This standard is issued under the fixed designation D5858;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 guide covers the concepts for calculating the in situequivalent layer elastic moduli can be used for pavementevaluation,rehabilitation and overlay design.The resultingequivalent elastic moduli calculated from the deflection dataare method-dependent and represent the stiffnesses of thelayers under a specific nondestructive deflection testing(NDT)device at that particular test load and frequency,temperature,and other environmental and site-specific conditions.Adjust-ments for design load,reference temperature,and other design-related factors are not covered in this guide.The intent of thisguide is not to recommend one specific method,but to outlinethe general approach for estimating the in situ elastic moduli ofpavement layers.1.2 This guide is applicable to flexible pavements and insome cases,rigid pavements(that is,interior slab loading),butis restricted to the use of layered elastic theory2as the analysismethod.It should be noted that the various available layeredelastic computer modeling techniques use different assump-tions and algorithms and that results may vary significantly.Other analysis procedures,such as finite element modeling,may be used,but modifications to the procedure are required.NOTE1If other analysis methods are desired,the report listed inFootnote 3 can provide some guidance.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 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.31.5 This guide offers an organized collection of informationor a series of options and does not recommend a specificcourse of action.This document cannot replace education orexperience and should be used in conjunction with professionaljudgment.Not all aspects of this guide may be applicable in allcircumstances.This ASTM standard is not intended to repre-sent or replace the standard of care by which the adequacy ofa given professional service must be judged,nor should thisdocument be applied without consideration of a projects manyunique aspects.The word“Standard”in the title of thisdocument means only that the document has been approvedthrough the ASTM consensus process.2.Referenced Documents2.1 ASTM Standards:4D653 Terminology Relating to Soil,Rock,and ContainedFluidsD4123 Test Method for Indirect Tension Test for ResilientModulus of Bituminous Mixtures(Withdrawn 2003)5D4602 Guide for Nondestructive Testing of Pavements Us-ing Cyclic-Loading Dynamic Deflection EquipmentD4694 Test Method for Deflections with a Falling-Weight-Type Impulse Load DeviceD4695 Guide for General Pavement Deflection Measure-ments3.Terminology3.1 DefinitionsIn addition to Terminology D653,the fol-lowing definitions are specific to this standard:1This guide is under the jurisdiction of ASTM Committee E17 on Vehicle-Pavement Systems and is the direct responsibility of Subcommittee E17.41 onPavement Testing and Evaluation.Current edition approved May 1,2015.Published June 2015.Originallyapproved in 1996.Last previous edition approved in 2008 as D5858 96(2008).DOI:10.1520/D5858-96R15.2The concepts of elastic layer theory are discussed in Chapter 2 of Principles ofPavement Design,by E.J.Yoder and M.W.Witczak,published by John Wiley andSons,Inc.,1975.3Corrections or adjustments and a complete discussion of the use of each ofthese analysis methods with different NDT devices may be found in:Lytton,R.L.,F.P.Germann,Y.J.Chou,and S.M.Stoffels“Determining Asphalt ConcretePavement Structural Properties by Nondestructive Testing,”NCHRP Report No.327,National Cooperative Highway Research Program,1990.4For 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.5The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.1 backcalculationanalytical technique used to deter-mine the equivalent elastic moduli of pavement layers corre-sponding to the measured loa