NDLI: Evaluation of rutting performance of asphalt concrete layers using multi-depth deflectometers (MDD)

Content Provider	Springer Nature Link
Author	Kim, Nakseok
Copyright Year	2004
Abstract	The multi-depth deflectometer (MDD) is an linear variable differential transformers (LVDT) deflection measuring device which is retrofitted into pavement layers. A maximum of six modules may be installed in a single 1.5 inch (3.8 cm) diameter hole. The modules are clamped against the sides of the hole at the required depths and the center core is attached to an anchor located approximately seven feet below the pavement surface. The MDD can measure the permanent deformation (rutting) of each layer in the pavement system. By placing multiple modules in a single hole, the vertical strains induced in pavement layers can be measured. This paper presents the evaluation of the rutting performance of asphalt concrete layers in various flexible pavement structures as well as the traffic measurement using weigh-in-motion (WIM) device installed in the field. It has been found that, at least for reasonably stiff supporting materials, most pavement rutting is confined in the asphalt concrete layer. In addition, the majorportion of the total surface permanent deformation in the flexible pavement stems from the upper part (top 3.6 inches (9.1 cm)) of the asphalt concrete layer. The permanent deformations from base, subbase, and subgrade layers were negligible if any.
Starting Page	411
Ending Page	416
Page Count	6
File Format	PDF
ISSN	12267988
Journal	KSCE Journal of Civil Engineering
Volume Number	8
Issue Number	4
e-ISSN	19763808
Language	English
Publisher	Korean Society of Civil Engineers
Publisher Date	2004-01-01
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	multi-depth deflectometer (MDD) performance permanent deformation Civil Engineering Industrial Pollution Prevention Automotive and Aerospace Engineering, Traffic Geotechnical Engineering
Content Type	Text
Resource Type	Article
Subject	Civil and Structural Engineering

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