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PaveScan (RDM) Field TestingFDOT’s Experience
Charles Holzschuher State Pavement Performance EngineerFlorida Department of Transportation
October 24, 2017
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• PaveScan RDM device PaveScan RDM device used to determine relative density of asphaltic layer
• Quality assurance/quality control of new pavements• Real-time dielectric measurements that correlate to
density • Allows for on-site continuous evaluation of relative
compaction effectiveness
PaveScan Rolling Density Meter (RDM)
| 3
• SMO APT Lanes
Project Test Locations
| 4
• SMO Test Strip
Project Test Locations
| 5
SMO Test Strip Results
| 6
SMO Test Strip Results
• Plot of % Density (Cores) and GPR Dielectric Values
y = 17.512x + 0.85R² = 0.80
78
80
82
84
86
88
90
92
94
96
4.5 4.6 4.7 4.8 4.9 5 5.1 5.2 5.3 5.4
Dens
ity (%
Com
pact
ion)
Asphalt Dielectric
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• SMO APT Lane 5
Project Test Locations
| 8
SMO APT Lane 5 Results
• GPR Dielectric Values and Thermal Imaging Profile
Distance (ft.)0 50 100 200 250 300 350 400150
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• New Construction – Active Segregation• 4-Lane Divided (2 NB Lanes; 2 SB Lanes)• Asphalt Surfacing• 12 ft. Lane Width• 3 passes per lane
Project Test Locations – SR 23
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SR 23 Results
• Contour Plot of Dielectric Values (SB Lanes)
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SR 23 Results
y = 33.267x - 77.733R² = 0.64
85.0
86.0
87.0
88.0
89.0
90.0
91.0
92.0
93.0
94.0
4.91 4.92 4.94 4.95 4.97 4.98 5.00 5.01 5.03 5.04
Dens
ity (%
Com
pact
ion)
Asphalt Dielectric
• Plot of % Density (Cores) and GPR Dielectric Values
| 12
• Concrete Slab Varying slab thickness
(4 in., 5 in., and 6 in.) FWD Calibration Slab
Other Uses/Needs
FWD Calibration Slab
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• Concrete Slab Curing Rate
Other Uses/Needs
2-day Curing
7-day Curing
02468
1012141618
Slab 1 Slab 2 Slab 3
Aver
age
Diel
ectr
ic
Concrete Slabs
2-Day Curing 7-Day Curing
-8% -25%-15%
Slab 1
Slab 3Slab 2
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QUESTIONS ???