MARC Record from Library of Congress

LEADER: 04136cam a22004817a 4500
001 2005410207
003 DLC
005 20130531104005.0
008 050706s2005 vaua bt s000 0 eng d
010 $a 2005410207
027 $aFHWA/VTRC 05-CR7
035 $a(OCoLC)ocm57488351
040 $aTDG$cTDG$dOCLCQ$dOCL$dDLC
042 $alccopycat
043 $an-us-va
050 00 $aTE250$b.A45 2005
082 00 $a625.8028/7$222
100 1 $aAl-Qadi, Imad L.
245 10 $aGround-penetrating radar calibration at the Virginia Smart Road and signal analysis to improve prediction of flexible pavement layer thicknesses /$cImad L. Al-Qadi, Samer Lahouar, Amara Loulizi.
260 $aCharlottesville, Va. :$bVirginia Transportation Research Council ;$a[Springfield, Va. :$bAvailable to the public through NTIS],$c2005.
300 $aiii, 62 p. :$bill. ;$c28 cm.
490 1 $aVTRC ;$v05-CR7
500 $aProject managers: Thomas E. Freeman, Kevin K. McGhee.
513 $aFinal contract report;$bJune 1999-June 2004.
536 $aPerformed by Virginia Tech Transportation Institute for Virginia Department of Transportation and U.S. Federal Highway Administration under contract no.$b53879
500 $a"January 2005."
530 $aAlso available online (Adobe Acrobat Reader required) via the Virginia Transportation Research Council website http://www.virginiadot.org/vtrc/main/index%5Fmain.htm.
520 3 $aA ground-penetrating radar (GPR) system was used to collect data over the different pavement sections of the Virginia Smart Road from June 1999 until December 2002. Three antennae at different frequencies were used for this research. The collected data were successfully used to evaluate the physical GPR detection limitations, to evaluate the GPR accuracy for pavement layer thickness determination, to control the installation of three different types of reinforcing meshes installed within the pavement, and to estimate the in-situ complex dielectric constant of several types of hot-mix asphalt (HMA). The data analysis results were verified by the well-documented structure and composition of each section of the road, in addition to the embedment of 35 copper plates (perfect electromagnetic reflectors) at the different layer interfaces during construction of the pavement. It was found that GPR is a feasible nondestructive tool to estimate the layer thicknesses of bound and unbound aggregate layers, HMA layers, and concrete slabs. However, interface detection can be altered if the layers have comparable dielectric constants. A technique was developed to estimate the frequency-dependent in-situ complex dielectric constant of HMA materials. Results have shown that the effect of the variations of the dielectric properties within the GPR bandwidth is insignificant vis-à-vis the accuracy of thickness estimation. The use of GPR as a quality control tool to verify the success of steel reinforcing mesh installation was also found to be feasible. Given the success of using GPR for the aforementioned applications in the Virginia Smart Road, it is recommended that the Virginia Department of Transportation use GPR more frequently as a quality control tool during new pavement construction projects and as an assessment tool prior to project rehabilitation and as part of Virginia's pavement management system.
504 $aIncludes bibliographical references.
650 0 $aPavements$zVirginia$xEvaluation$xEquipment and supplies.
650 0 $aGround penetrating radar.
650 0 $aRoads$xFoundations$xTesting.
650 0 $aNondestructive testing.
650 0 $aThickness measurement.
650 7 $aDielectric properties.$2trt
700 1 $aLahouar, Samer.
700 1 $aLoulizi, Amara.
710 2 $aVirginia Polytechnic Institute and State University.$bTransportation Institute.
710 2 $aVirginia Transportation Research Council.
710 1 $aVirginia.$bDepartment of Transportation.
710 1 $aUnited States.$bFederal Highway Administration.
830 0 $aVTRC (Series) ;$v05-CR7.
856 41 $uhttp://www.virginiadot.org/vtrc/main/online%5Freports/pdf/05-cr7.pdf