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Home » Products » Pavement Testing » Falling weight deflectometer » Heavy Weight Deflectometer HWD

Heavy Weight Deflectometer HWD

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TBTHWD-NJ-M is a non-destructive testing instrument for pavement and airport upgraded from original FWD, besides pavements bearing capacity, it also can be used for non-destructive testing of stiff bound material as found on Airport Runways and truck car parks.
  • HWD-NJ-M
  • TBTSCIETECH
  • HWD-NJ-M
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A four-part split loading plate is placed on the surface of pavement and a load pulse is applied to the plate. The load pulse is generated by the impact of a falling weight. The load pulse is designed to cause a deflection that closely simulates the deflection of actual aircraft wheel loading up to 250KN.

Utilising 9 pcs deflection sensors to measure deflection basin and collect the information to determine surface material strengthBy combining this data with Layer thickness, resilient E-moduli can be determined, and further analysis can determine bearing capacity, structural strength, overlay design and expected surface life, then achieve proper maintenance.

 

A four-part split loading plate is placed on the surface of pavement and a load pulse is applied to the plate. The load pulse is generated by the impact of a falling weight. The load pulse is designed to cause a deflection that closely simulates the deflection of actual aircraft wheel loading up to 250KN.

Utilising 9 pcs deflection sensors to measure deflection basin and collect the information to determine surface material strength. By combining this data with Layer thickness, resilient E-moduli can be determined, and further analysis can determine bearing capacity, structural strength, overlay design and expected surface life, then achieve proper maintenance.


Loading force12~250KN ( 150KN optional to be normal FWD)
Moving speed0~120km/hour
Testing speed per pointAround 35s
Deflection typeMagnet electric speed sensor
Deflection sensor quantity1~9pcs selectable (can be extended up to 15pcs)
Deflection range ±2500um
Deflection accuracy:2%
Deflection repeatability1%
Loading repeatability:2%
Loading resolution 0.1KN , 1Kpa
Loading plate:D300mm / 4-segment plate (D450mm can be customized)
Temp. Measuring range-50℃ ~ 100℃ / platinum resistance & infrared
Temp. Resolution 0.1℃
Temp. Accuracy0.5%
GPS accuracy+/-5meters
WeightAround 1500KG


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