The Dynatest Light Weight Deflectometer (LWD) can be used to test thin asphalt-like pavements. Ideal to test the unbound subgrade.

Mar 11, 2025 · The lightweight deflectometer test is especially useful in situations where common alternatives are not appropriate or cost-efficient. For example, the LWD is more reliable than the Dynamic Cone Penetrometer (DCP) when assessing soft or loose materials. How Does the LWD Test Work? 5 Key Steps

Apr 8, 2025 · By measuring the modulus value, the Light Weight Deflectometer provides the link between the design specification (design modulus value) and the actual site condition (in-situ modulus value). The Zorn LWD’s measures the dynamic modulus of deformation Evd in the range from 15 up to 140 MN/m².

The Light Weight Deflectometer (LWD) is a portable tool for measuring bearing capacity in subgrades, granular layers and backfilling materials. Our LWD testing provides rapid, accurate assessments, freeing your projects from traditional constraints.

The Light Weight Deflectometer TERRATEST 9000 LWD is designed to check compaction quality using a geophone and load cell. Purchase your LWD directly from the German manufacturer, with the best price guaranteed!

Nov 16, 2020 · The LWD is lightweight, portable, and generally used for testing unbound pavement layers. The deflections measured using an LWD can be used to determine the stiffness of bound and unbound pavement surfaces using appropriate back or …

Jul 22, 2020 · The LWD used in the standard, calibrated configuration – 10 kg weight, full height drop and 300 mm plate – will provide a single stress vs. deflection datapoint (i.e. deflection magnitude under 100 kPa stress).

Olson’s Light Weight Deflectometer (LWD-1) measures in-situ soil modulus to ensure soil compaction requirements are met on subgrade, subbase and roadbase.

Light Weight Deflectometer (LWD) tests are a dynamic plate load test tool used for quality assurance on construction sites, especially for road construction. They are perfect for field use where you need to test dynamic deformation modulus Evd (a material’s level of stiffness) of soil and other granular materials.

Mar 6, 2018 · Test method covers the determination of the plate deflection, Test surface shall be clean and smooth as possible with loose granular material, Load plate deflection should be equal to the surface deflection under the plate, Select site and set up LWD connection to its computational unit,