Implementation of Rolling Wheel Deflectometer (RWD) in PMS and Pavement Preservation : Tech Summary
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2012-08-01
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NTL Classification:NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION ; NTL-HIGHWAY/ROAD TRANSPORTATION-Materials ; NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance ;
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Abstract:Evaluation of pavement structural capacity and integrity is an important component of the Pavement Management
System (PMS) to assist in the selection of suitable maintenance and rehabilitation strategies. The falling weight
defl ectometer (FWD) is a non-destructive defl ection testing method that is widely used at the project-level to assess
the structural capacity of in-service pavements. However, issues such as expenses involved in data collection and
scarcity of resources appear to present obstacles for a wide adoption of FWD for pavement testing at the network
level. In addition, delays due to lane closures may compromise the safety of the traveling public and highway
workers, which may not justify the worth of the collected data. The rolling wheel defl ectometer (RWD), which
measures defl ections at highway speeds, was introduced to support existing non-destructive testing techniques by
providing for a screening tool of structurally defi cient pavements at the network level. RWD testing does not cause
traffi c disruption or decreased safety along the tested highway. This nondestructive testing (NDT) device also off ers
the potential of characterizing the structural capacity and integrity of the pavement network in an eff ective way in
terms of time and cost associated with the testing process.
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