Logging while drilling (LWD) is a technique of conveying well logging tools into the well borehole downhole as part of the bottom hole assembly (BHA).

Mar 11, 2025 · The Lightweight Deflectometer (LWD) is widely used in construction and geotechnical engineering, recognised for its high accuracy, efficiency, and cost-effectiveness when assessing carriageway layers.

The LWD can be used to test thin asphaltic pavements, recycled materials bound with foamed bitumen and directly test unbound subbase and subgrade. The output from the LWD can be used to calculate the strength of multiple pavement layers.

Zorn introduces the Laboratory Light Weight Deflectometer in support of the FHWA Transportation Pooled Funding Research Project TPF-5 (285) results that developed a draft AASHTO Standard Test Method to determine Target Acceptance Modulus values from Proctor Mold samples.

Lightweight Deflectometer provides a rapid determination of elastic modulus, essential in mechanistic design and used to accurately assess compaction.

Aug 3, 2004 · Light Weight Deflectometers, or LWD, are portable, light weight tools used to determine the load bearing capacity and overall compaction quality of soils, non-cohesive sub-bases and soil improvements in as little as two minutes.

Mar 6, 2018 · Set the plate on a prepared surface and seat it by turning it left and right by 45 degrees. Do not drop the loading plate on the prepared surface. LWD plate should not translate laterally with each successive drop. Perform 3 seating drops before collecting the data. If noticing excessive deflection. Material needs additional compaction.

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).

Aug 13, 2020 · A Light-Weight Deflectometer (LWD) is a fantastic tool for testing the prepared formation of your pitch or a stone foundation which supports the turf system of your pitch. It works equally well for the assessment of the base of an athletic track or court.

A Light Weight Deflectometer (LWD) is a testing device that is portable and non-destructive, primarily used in geotechnical and pavement engineering. It is used to assess the structural properties and compaction of soils and pavements.