Laser Profilometer

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Measures the profile of the pavement surface.

Built by VTI

Linear Vertical Displacement Transducers

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Measurements of Surface Deflection of a pavement and Permanent Deformation and Elastic Deflection within a pavement structure

LVDT, RDP-TM0256

Inductive coils

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Measurements of Permanent Deformation and Elastic Deflection within a pavement structure

Electronics bought from University of Nottingham (Andrew Dawsson) and coils manufactured at VTI

Linear Vertical Displacement Transducers.

(Click image to enlarge)

Measurements of Surface Deflection of a pavement and Permanent Deformation and Elastic Deflection within a pavement structure

LVDT, RDP-TM0256

Inductive coils

(Click image to enlarge)

Measurements of Permanent Deformation and Elastic Deflection within a pavement structure

Electronics bought from University of Nottingham (Andrew Dawsson) and coils manufactured at VTI

Asphalt concrete strain gauge, PAST II-AC, Dynatest

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Strain measurements in Asphalt Concrete Layers

H-shaped strain gauges

Portland cement concrete strain gauge, PCCS, Dynatest

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Strain measurements in Cement Concrete Layers

H-shaped strain gauges

Pressure Cell. University of Nottingham

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Pressure cell for use in unbound pavement layers and subgrade soil

Pressure Cell. Geokon, Inc. Model 3500-2

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Pressure cell for use in unbound pavement layers and subgrade soil

Thermocouple PT 100

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Measurement of asphalt temperature at different depths during HVS testing.

Water content reflectometer

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Water Content Reflectometers, (WCR, CS616)

Measurements of volumetric water content in unbound pavement layers

Data Acquisition System

The following amplifiers and data loggers have been used: Temperature: Fluke Hydra Data Logger. Water content: Campell scientific logger CR10X. Strain and pressure( Nottingham ): KyoWa DPM 711 B. LVDT: RDP Modular 600

The software used is developed by VTT in Finland from a previous system used at earlier full scale field tests