The Light Weight Deflectometer (LWD)
The Dynatest Light Weight Deflectometer (LWD) is a portable solution based on the Falling Weight Deflectometer (FWD) concept. This lightweight device incorporates a load cell and geophones, delivering the same level of accuracy as its larger counterpart.
The LWD is ideal for testing various pavement types, including thin asphaltic pavements, foamed bitumen-bound recycled materials, as well as unbound subbase and subgrade layers.
By utilising the LWD, users can calculate the strength of multiple pavement layers effectively.
Compliant with ASTM 2583, IAN73 (UK), Danish, and Italian standards for modulus determination and material compaction, the Light Weight Deflectometer (LWD) guarantees top-notch quality. Its exceptional portability facilitates measurements even in remote or rural areas.
Moreover, the LWD App streamlines the measurement process, offering a user-friendly interface to view and manage collected data. The app also enables quick and convenient collection of new drops, while providing export options such as exporting datasets to the applied device, iCloud, or sharing via email.
Key Benefits:
- Single-operator functionality
- Rapid testing allows for close test point spacing, ensuring homogeneity of the test section
- Modulus output available at the time of testing
- The LWD App provides a clear overview of collected measurements
- Assessment of compaction and stiffness using a single unit
- Quality control of subbase layers and subgrade prior to applying an overlay
- Testing of trench restorations to minimise settlement risks over time
Comprehensive accessory program
- Transportation Trolley, for ease of transportation on site
- Geophone Kit, Sensor Beam incl. 2 additional geophones
- Transportation box for Geophone Kit
- Additional 200mm Loading Plate
- Extra 5kg weights and required buffer plates (Possibility to add 2 additional 5kg weights)
The Dynatest LWD is high-quality, but becomes truly powerful with the software pack.
The LWD App light software pack comes free of charge and gives you great data collection opportunities, with market leading functionalities via an app for both iOS/Android. The Pro version adds calculations, statistics and analysis options beyond your imagination.
Structured approach – free of charge
- Create hierarchal databases for data collection (Project, Session, and Location).
- Input data collection attributes, assumptions & comments
- Ability to collect real time GPS location
- Ability to capture and tag photo images on each test location
- Offline data acquisition
- Instant surface modulus results, figures, and summary tables, on Location, Session, and Project level
- Data export and sharing for post-processing with LWDMod or similar program
- The database file from your LWD App can be shared via email or exported directly to the phone’s memory.
Enhanced functionalities in the LWD Pro App
- Compaction Quality Control and Statistics module providing different compaction criteria to determine percentage compaction according to MNDOT, INDOT, TPF 5-285, Italian ANAS and UK specifications.
- Statistics on location, sessions and project level, including the possibility to customise to show the statistical value required
LWDMod software provides an ideal analysis package
LWDMod Lite version:
• lmport and edit LWD data for removal of outliers
• Export test results to Excel or Word for further analysis
• Export to UK requirements
• Possibility to export: point number, location, drop number, time, plate size, load, stress, geophone(s) distance(s), geophone(s) deflection(s), surface deflection moduli, deflection offset, loss of energy, air temperature, surface temperature, material temperature, GPS/notes, time histories, CBR soil, compaction results (shown & calculated in Dynatest LWD 3032 Pro App)
LWDMod, licensed version, will give you enhanced calculations and analysis:
• One license required per PC
• Data Visualisation—including figures and summary tables
• Calculation and Analysis including: back-calculation of layer moduli, overlay design thickness calculations, depth to bedrock, subgrade no-linearity, and estimation of the layer thickness