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Title:

Transition of Rolling Dynamic Deflectometer Device from Screening Tool to Evaluation Tool for Rigid Airfield Pavement Projects

Accession Number:

01337707

Record Type:

Component

Abstract:

Over the past decade, the Rolling Dynamic Deflectometer (RDD), a continuous deflection measurement device, has been used as a powerful screening tool in identifying problematic airport pavements to be repaired. However, the RDD has not seen much use as an evaluation tool to measure characteristics such as moduli of pavement layers and load transfer efficiency (LTE). The primary goal of this research is to take the RDD from a screening tool to an evaluation tool for airport pavement projects by developing the hardware and software. In this study, the RDD as an evaluation tool could obtain: (1) continuous measurement of rolling deflection basins (for the backcalculation of layer moduli to be studied) and (2) continuous evaluation of joint LTEs. Four subtasks have been conducted: (a) investigation of parameters affecting the RDD measurements, (b) increase the number of rolling sensors, (c) improvement of RDD data processing (distance-based deflection profile with increased spatial resolution), and (d) a series of field tests with the RDD on a rigid airfield pavement. With all five sensors continuously being monitored during rolling, software developed was capable of selecting a zone of lateral uniformity over which it is appropriate to construct deflection basins. The improved data processing identified accurate locations of joints, and properly positioned two rolling sensors on opposite sides of the adjacent slabs in the continuous deflection profile, resulting in continuous LTE evaluation along the pavement. The RDD measurements (continuous deflection basins and LTEs) were compared with Falling Weight Deflectometer (FWD) measurements, and their comparison provided promising results.

Monograph Accession #:

01329018

Report/Paper Numbers:

11-0022

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Nam, Boo-Hyun

Pagination:

20p

Publication Date:

2011

Conference:

Transportation Research Board 90th Annual Meeting

Location: Washington DC, United States
Date: 2011-1-23 to 2011-1-27
Sponsors: Transportation Research Board

Media Type:

DVD

Features:

Figures; Photos; References (14)

Subject Areas:

Aviation; Maintenance and Preservation; Pavements; I61: Equipment and Maintenance Methods

Source Data:

Transportation Research Board Annual Meeting 2011 Paper #11-0022

Files:

TRIS, TRB

Created Date:

Feb 17 2011 5:18PM