Correlation of the Road Rater and the Dynatest Falling Weight Deflectometer PDF Download
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Author: Kevin Jones Publisher: ISBN: Category : Pavements Languages : en Pages : 14
Book Description
The Falling Weight Deflectometer (FWD) has become the "standard" for deflection testing of pavements. Iowa has used a Road Rater since 1976 to obtain deflection information. A correlation between the Road Rater and the FWD was needed if Iowa was going to continue with the Road Rater. Comparative deflection testing was done using a Road Rater Model 400 and a Pynatest 8000 FWD on 26 pavement sections. The SHRP contractor, Braun Intertec Pavement, Inc., provided the FWD testing. The r^2 for the linear correlations ranged from 0.90 to 0.99 for the different pavement types and sensor locations.
Author: Kevin Jones Publisher: ISBN: Category : Pavements Languages : en Pages : 14
Book Description
The Falling Weight Deflectometer (FWD) has become the "standard" for deflection testing of pavements. Iowa has used a Road Rater since 1976 to obtain deflection information. A correlation between the Road Rater and the FWD was needed if Iowa was going to continue with the Road Rater. Comparative deflection testing was done using a Road Rater Model 400 and a Pynatest 8000 FWD on 26 pavement sections. The SHRP contractor, Braun Intertec Pavement, Inc., provided the FWD testing. The r^2 for the linear correlations ranged from 0.90 to 0.99 for the different pavement types and sensor locations.
Author: National Research Council (U.S.). Transportation Research Board Publisher: Transportation Research Board ISBN: 9780309046244 Category : Nondestructive testing Languages : en Pages : 116
Author: Bary Eagleson Publisher: ISBN: Category : Dynaflect Languages : en Pages : 153
Book Description
A literature search was made for the purpose of comparing deflection measuring devices. The Dynaflect, Road Rater, and Falling Weight Deflectometer (FWD) ranked highest when compared, using the criteria of cost, operational characteristics, and suitability. Field testing proved the Dynaflect and FWD were nearly equal in overall ability except in operational speed. Here the Dynaflect was superior primarily due to the automated sensor placement. The correlation coefficients obtained showed good agreement between the deflections measured by the two devices on all pavements tested except overlaid CRCP. This study indicates that there may be pavements and conditions for which the Dynaflect does not provide useful information or where present methods of data interpretation do not appear to be adequate.
Author: Charles W. Beilfuss Publisher: Transportation Research Board National Research ISBN: Category : Technology & Engineering Languages : en Pages : 372
Author: Marshall R. Thompson Publisher: ISBN: Category : Technology & Engineering Languages : en Pages : 52
Book Description
This synthesis will be of interest to pavement designers, maintenance engineers, and others interested in reducing reflection cracking of asphalt overlays on portland cement concrete (PCC) pavement. Information is presented on the technique of breaking or cracking of the concrete pavement into small segments before overlaying with asphalt concrete. Asphalt concrete overlays on existing PCC pavements are subject to reflection cracking induced by thermal movements of PCC pavement. This report of the Transportation Research Board discusses the technique of breaking/cracking and seating of the existing PCC before an overlay as a means to reduce or eliminate reflection cracking.
Author: Kevin Jones
Author: Kevin Jones
Author: Stephen W. Colson
Author: National Research Council (U.S.). Transportation Research Board
Author: Bary Eagleson
Author: 
Author: National Cooperative Highway Research Program
Author: U.S. Army Engineer Waterways Experiment Station
Author: Charles W. Beilfuss
Author: Marshall R. Thompson
Author: