Abstract
To evaluate the structural capacity of any in-place pavement, certain information is required, including knowledge of the strength properties of each pavement layer. Currently, generally accepted methods exist for the backcalculation of flexible, asphalt (AC) pavement and rigid, portland cement concrete (PCC) pavement layer stiffness characteristics using data collected with a falling weight deflectometer (FWD). Backcalculation programs based on elastic layer theory are used for AC pavements. Plate theory solutions for a slab on a dense liquid (Winkler) foundation are used for PCC pavements. There does not exist a widely accepted procedure for the backcalculation of asphalt-overlaid concrete (AC/PCC) pavements resting on a dense liquid foundation. This paper presents an evaluation of different procedures proposed recently for AC/PCC pavement backcalculation. These procedures are based on three pavement models. The discussion of these models will be followed by a brief description and comparison of five backcalculation procedures. Two types of comparisons were conducted - backcalculation using theoretically generated deflection basins and backcalculation using field-collected FWD data. The methods were critically reviewed and compared for accuracy of the results.
Original language | English (US) |
---|---|
Title of host publication | Aircraft/Pavement Technology |
Subtitle of host publication | In the Midst of Change |
Publisher | ASCE |
Pages | 107-124 |
Number of pages | 18 |
State | Published - Dec 1 1997 |
Event | Proceedings of the 1997 Airfield Pavement Conference - Seattle, WA, USA Duration: Aug 17 1997 → Aug 20 1997 |
Other
Other | Proceedings of the 1997 Airfield Pavement Conference |
---|---|
City | Seattle, WA, USA |
Period | 8/17/97 → 8/20/97 |