01082342

Component

https://doi.org/10.3141/2005-09

http://scholar.google.com...sche&publication_year=2007

The primary objective of this research effort is to determine if temperature gradients affect the ability to use falling weight deflectometer (FWD) testing to monitor pavement joint performance and detect voids under the corners of the slab. A field investigation was performed at the Minnesota Road Research System test facility to meet this objective. It was found that gradients can have an effect on the results of FWD testing for rigid pavements. Although the load transfer efficiencies measured for doweled slabs were not found to be affected by slab temperature or temperature gradients (even when poor joint performance was exhibited), load transfer efficiencies measured for the undoweled slabs were greatly influenced by the presence of a gradient. There even appears to be a higher correlation between the gradient present at the time of testing and the average temperature of the slab for the pavement designs and environmental conditions included in this study. Gradients present at the time of testing also affect the ability to detect voids beneath the slab. Large positive gradients produced negative void parameters (indicating that a void was not present), whereas large negative gradients produced large positive void parameters (indicating that a void was present). This study found that loss of support under the slab could be identified even when the joints were locked if gradients were not present. On the basis of these findings, it is important to determine the complete temperature profile throughout the depth of the slab at the time of testing so that this information can be considered when the deflection data are interpreted.

01082341

English

pp 75-85

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104319

Print

Figures (9) ; References (11) ; Tables (2)

Air voids; Falling weight deflectometers; Load transfer; Monitoring; Pavement joints; Rigid pavements; Temperature gradients

Load transfer efficiency

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Dec 13 2007 2:32PM

• Advanced Approaches to Characterizing Nonlinear Pavement System Responses
• Consideration of Finite Slab Size in Backcalculation Analysis of Jointed Concrete Pavements
• Development of Transfer Functions for Spectral Compatibility of Inertial Profilers Used in Long-Term Pavement Performance Program
• Early-Life Performance of Cold-in-Place Pavement Recycling with Foamed Asphalt Technique
• Effectiveness of Transverse and Longitudinal Pavement Grooving in Wet-Skidding Control
• Effects of Reclaimed Asphalt Pavement on Mechanical Properties of Base Materials
• Engineering Framework for Self-Consistent Analysis of Falling Weight Deflectometer Data
• Evaluation of New Mechanistic–Empirical Pavement Design Guide Rutting Models for Multiple-Axle Loads
• Evaluation of Rubblized Pavement Sections in Michigan
• Forwardcalculation of Pavement Moduli with Load-Deflection Data
• Noninvasive Measurement of Three-Dimensional Permanent Strains in Asphalt Concrete with X-Ray Tomography Imaging
• Performance Evaluation of Bonded Concrete Pavement Overlays After 11 Years
• Prediction of Wet-Pavement Skid Resistance and Hydroplaning Potential
• Resilient Modulus of Base Course Containing Recycled Asphalt Pavement
• Stripping Detection in Asphalt Pavements with Seismic Methods
• Ultrathin Bonded Wearing Course as Pavement Preservation Treatment for Jointed Concrete Pavements
• Wavelet Analysis of Energy Content in Pavement Roughness and Truck Dynamic Axle Loads