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Home » Products » Pavement Testing » Falling weight deflectometer » Light Weight Deflectometer LWD
Light Weight Deflectometer LWD
Light Weight Deflectometer LWD Light Weight Deflectometer LWD
Light Weight Deflectometer LWD Light Weight Deflectometer LWD
Light Weight Deflectometer LWD Light Weight Deflectometer LWD

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Light Weight Deflectometer LWD

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TBT Light Weight Deflectometer LWD is a portable version of FWD, with loading cell & geophones, it can be used to test asphalt pavement & railway subbase, the data get from LWD can be used to calculate the strength of multiple pavement layers. TBTLWD-1 is made as per Standard: Chinese Industry Standard JTG E60 - 2008.
  • TBTLWD-1

  • TBTSCIETECH

  • TBTLWD-1

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Parameters

Loading device

Hammer:10.0kg (optional 15kg, 20kg)

Maximum drop height: 700mm

Maximum impact loading:20kN

Pulse loading shape: Half sine

Wave pulse loading duration15~30ms

Material: galvanized alloy steel

Weight15kg (including 10 kg hammer)

Height1100mm

Loading board

Diameter300mm (optional 200, 450mm)

Thickness20mm

Materialgalvanized alloy steel

Weight15kg

Electronic Settlement (wireless control)

Loading force measurement range25 kN

Loading force measurement accuracy<2%

Displacement measurement range2mm

Displacement measurement accuracy< 1%

Measurement time per point<1 minute

Sensors for displacement measuring3pcs  (expandable)

Data storage capacity2000 group test data

Power supplyLithium battery

Continuous working time12 hours

Working environment temperature range-10 ~ 40°C

Working environment humidity rangenot more than 85% RH (no condensation)



The Light Weight Deflectometer (LWD) is a versatile and reliable tool used for measuring the deflection and bearing capacity of soil and granular materials. This device is equipped with a loading device that includes a hammer with a weight of 10.0kg, with optional weights of 15kg and 20kg available. The maximum drop height of the hammer is 700mm, allowing for precise and consistent impact loading.


The LWD is capable of delivering a maximum impact loading of 20kN, ensuring accurate and consistent results. The pulse loading shape is half sine, providing a controlled and uniform loading profile. The wave pulse loading duration ranges from 15 to 30ms, allowing for flexibility in testing different materials and soil conditions.


Constructed from durable and high-quality materials, the Light Weight Deflectometer is designed to withstand rigorous field conditions and provide reliable and accurate measurements. With its advanced features and precise loading capabilities, the LWD is an essential tool for geotechnical engineers, construction professionals, and researchers looking to assess the strength and stability of soil and granular materials.





Main functions:

Rapid test subgrade reaction coefficient  K value.

Rapid test subgrade elastic modulus E value.

Quickly evaluate joint transfer capacity levels.

Display waveform of loading & displacement.

Loading board wireless connect with smart mobile phone (via WiFi) for data transfer, with blue tooth printer.

 

The detail application range:

Asphalt pavement, railway subbase and subgrades and earthwork construction projects.

Ditch soil quality inspection.

Construction cushion quality inspection.

Pile hole, pit quality inspection.

Deformation modulus detection of building foundation frame.


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