01514935

Component

https://doi.org/10.3141/2433-09

Deflection testing and analysis are routinely used to evaluate the spring load capacity of pavements and to design structural overlays. The current falling-weight deflectometer (FWD) deflection analysis process used by the Minnesota Department of Transportation was found to be unreliable. Traditionally, the process used to interpret FWD deflection measurements converted the measured maximum FWD deflection to an equivalent Benkelman beam deflection and compared it with the allowable deflection for a pavement with given asphalt surface thickness and anticipated traffic. Because the maximum FWD deflection is greatly affected by the subgrade stiffness, the computer program TONN may underestimate the allowable axle load for subgrades depending on the subgrade material. As a result, the researchers determined that the allowable axle load rating procedure should be revised. Those revisions and the development of a new rating procedure for low-volume roads are detailed.

01552761

14-2146

English

pp 79–86

2014

Transportation Research Record: Journal of the Transportation Research Board

9780309295215

Print

Figures (3) ; References (13) ; Tables (5)

Bearing capacity; Deflection; Falling weight deflectometers; Low volume roads; Overlays (Pavements); Subgrade (Pavements); Thickness

Minnesota Department of Transportation

Minnesota

Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways

PRP, TRIS, TRB, ATRI

Jan 27 2014 2:45PM

• Assessing Transferability of Highway Safety Manual Crash Prediction Models to Data from Italy
• Cold Region Applications for In-Place Inclinometers Based on Microelectromechanical Systems Technology: Four Evaluation Case Studies
• Collecting Decision Support System Data Through Remote Sensing of Unpaved Roads
• Discrete Element Modeling of Effect of Moisture and Fine Particles in Lightweight Deflectometer Test
• Economic Impact of Closing Structurally Deficient or Functionally Obsolete Bridges on Very Low-Volume Roads
• Effect of Matric Suction on Resilient Modulus for Compacted Recycled Base Course in Postcompaction State
• Evaluation of Unknown Foundations of Bridges Subjected to Scour: Physically Driven Artificial Neural Network Approach
• Generating Hourly Climatic Data for Pavement Design from Available Weather Information
• Investigating Safety Impact of Edgelines on Narrow, Rural Two-Lane Highways by Empirical Bayes Method
• Model for Schedule Risk Evaluation in Subsurface Explorations
• New Procedure for Selecting Chemical Treatments for Unpaved Roads
• Relationship Between Traffic Loading and Environmental Factors and Low-Volume Road Deterioration
• Seismic Waveform Tomography at Test Site with Open Chimneys
• Using Field Data to Evaluate Bottom Ash as Pavement Insulation Layer