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)

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• SMO APT Lanes

Project Test Locations

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• SMO Test Strip

Project Test Locations

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SMO Test Strip Results

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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

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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

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• 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 ???