00802453

Component

https://doi.org/10.3141/1716-03

http://scholar.google.com...SHER&publication_year=2000

Moisture in the base and subgrade layers of pavement can significantly decrease the modulus values of these layers. Recently, a study was performed on several Florida state roads for the purpose of evaluating the decrease in moduli of bases and subgrades due to the proximity of the water table. Dynaflect and falling weight deflectometer (FWD) tests were performed on pavement test sections throughout Florida for the purpose of backcalculation of the modulus values of the different layers. Testing was performed at different times of the year, and the water table fluctuations were recorded throughout the study. The Dynaflect and FWD deflections, water contents, depths to water table, layer thicknesses, pavement temperatures, and air temperatures were recorded on all test sections over a 5-year period. EVERCALC was used for backcalculation of modulus values on the basis of FWD tests. The Dynaflect data were also used for calculation of layer properties on the basis of a procedure developed by the Florida Department of Transportation. Both Dynaflect and FWD showed that the water table had a significant negative impact on the modulus values of the base and subgrade materials. Such results are extremely beneficial aids for establishing acceptable embankment depths so that the effects of moisture on the modulus values of pavements may be reduced.

This paper appears in Transportation Research Record No. 1716, Pavement Assessment and Testing.

English

p. 20-29

2000

Transportation Research Record

0309066956

Figures (9) ; Photos (1) ; References (7) ; Tables (9)

Backcalculation; Base course (Pavements); Deflection tests; Depth; Dynaflect; Embankments; Falling weight deflectometers; Modulus of resilience; Moisture content; Subgrade (Pavements); Temperature; Test sections; Thickness; Water table

Florida

Data and Information Technology; Highways; Hydraulics and Hydrology; Pavements; I23: Properties of Road Surfaces

TRIS, TRB, ATRI

Nov 6 2000 12:00AM

• ACCELERATED PAVEMENT TESTING OF RUTTING PERFORMANCE OF TWO CALTRANS OVERLAY STRATEGIES
• BACKCALCULATION OF THERMALLY DEFORMED CONCRETE PAVEMENTS
• CURVILINEAR BEHAVIOR OF BASE LAYER MODULI FROM DEFLECTION AND SEISMIC METHODS
• DYNAMIC INTERPRETATION OF FALLING WEIGHT DEFLECTOMETER TEST RESULTS: SPECTRAL ELEMENT METHOD
• ESTIMATING SUBGRADE STIFFNESS AND BEDROCK DEPTH: COMBINED FALLING WEIGHT DEFLECTOMETER AND SIMPLIFIED SPECTRAL ANALYSIS OF SURFACE WAVES MEASUREMENTS
• EVALUATING MEASURED TIRE CONTACT STRESSES TO PREDICT PAVEMENT RESPONSE AND PERFORMANCE
• EVALUATING RUNWAY PAVEMENTS AT SEATTLE-TACOMA INTERNATIONAL AIRPORT: CONTINUOUS DEFLECTION PROFILES MEASURED WITH THE ROLLING DYNAMIC DEFLECTOMETER
• IT'S 10 O'CLOCK: DO YOU KNOW WHERE YOUR SENSORS ARE?
• PERFORMANCE OF SUPERPAVE MIXTURES UNDER ACCELERATED LOAD TESTING
• PERFORMANCE PREDICTION OF LOUISIANA ACCELERATED LOADING FACILITY TEST SECTIONS
• RUTTING OF THIN PAVEMENTS: FULL-SCALE STUDY
• SUPER-ACCELERATED TESTING OF FLEXIBLE PAVEMENT WITH STATIONARY DYNAMIC DEFLECTOMETER
• TEMPERATURE CORRECTION ON FALLING WEIGHT DEFLECTOMETER MEASUREMENTS
• TRUCK TRAVEL TIME AROUND WEIGH STATIONS: EFFECTS OF WEIGH IN MOTION AND AUTOMATIC VEHICLE IDENTIFICATION SYSTEMS
• USING A ROAD SURFACE ANALYZER TO EXPLAIN NOISE CHARACTERISTICS OF PORTLAND CEMENT CONCRETE PAVEMENT SURFACE TEXTURE
• USING TRANSVERSE PROFILE DATA TO COMPUTE PLASTIC DEFORMATION PARAMETERS FOR ASPHALT CONCRETE PAVEMENTS