ASTM_E_3013_-_E_3013M_-_15.pdf

Designation:E3013/E3013M15Standard Test Method forEvaluating Concrete Pavement Dowel Bar Alignment UsingMagnetic Pulse Induction1This standard is issued under the fixed designation E3013/E3013M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the equipment,field procedures,and interpretation methods for the assessment of PortlandCement Concrete Pavement dowel bar alignment using Mag-netic Pulse Induction(MPI),also referred to as magneticimaging tomography or eddy current tomography.MagneticPulse Induction(MPI)devices induce a weak pulsed magneticfield that causes the induction of eddy currents in metal objectsdisturbing the field.When metal(dowel bar)enters into thefield an electrical signal is produced and processed throughalgorithms to detect and produce quantitative values for thedepth,alignment and side shift locations of each dowel and tiebar present in the pavement joint.1.2 MPI equipment includes the following systems scanningdevice that induces the magnetic field and collects the electricalsignal,orientation system such as a rail system,field datacollection device that collects the signal data from the scanner,performs field analysis,and stores data,analysis softwarepackage that calculates the dowel bar positions,allows dataadjustments to account for detected anomalies and producesreports.1.3 MPI field procedures describe the steps and processesrequired to collect reliable,repeatable and accurate resultsfrom the scanner operation and orientation system.Critical tothe accuracy is the absence of any metal items except for thedowel bars in the vicinity of the joints being tested.Metal inthe scanner and orientation system should be minimized.Thescanner operation procedures cover the collecting of the data,reviewing the results on the field data collector,and determin-ing if the data collection test was successful.1.4 MPI interpretation methods describe how to analyzedata collected in the field procedure,steps taken to addressinterferences,and anomalies discovered during the data analy-sis to provide accurate results for the dowel bar positions.Alsominimum report content is prescribed for the production ofmeaningful test information substantiating the results.1.5 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in non-conformance with the standard.1.6 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:2A615/A615M Specification for Deformed and Plain Carbon-Steel Bars for Concrete ReinforcementA1078/A1078M Specification for Epoxy-Coated Steel Dow-els for Concrete Pavement3.Terminology3.1 Definitions:3.1.1 composite misalignment,nthe composite misalign-ment using the horizontal and vertical misalignments ascomponents in calculating a total spatial deviation of the dowelaxis from design orientation.3.1.1.1 DiscussionHorizontal and vertical misalignmentare the legs of a right angle triangle and the compositemisalignment is the hypotenuse.3.1.2 depth,nthe measured position of the centroid of thedowel bar from the surface of the concrete pavement in thez-axis.3.1.3 depth deviation,nthe difference in specified ordesign depth of the dowel bar versus the measured depth at thecentroid of the dowel bar.3.1.3.1 DiscussionValues are expressed either positive foradditional depth or negative for less depth.1This test method 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 July 2015.DOI:10.1520/E3013_E3013M-15.2For 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 3.1.4 horizontal misalignment,nalso referred to as hori-zontal skew,the amount of horizontal rotation in a dowel barabout its center point when viewed from the edge of pavementor lane where the test was initiated.3.1.4.1 DiscussionRotation in a clockwise direction isreflected as a positive value.Rotation in a counter-clockwisedirection is reflected as a ne