CBR Field Test Sets & In-Place Bearing Ratio Equipment
Understand the Field Test Arrangement
A field CBR test forces a penetration piston into the prepared surface while load and penetration are measured, providing a relative strength indication for pavement and subgrade evaluation. The setup requires a loading arrangement, measurement instruments and surcharge loading, planned around the governing procedure and site conditions.
Confirm the reaction-load arrangement available at the site before ordering; field configurations differ from laboratory load-frame setups, and the governing method determines acceptable arrangements.
Compare Field Test Sets
The CBR Field Test Set, Two-Speed Jack is one complete field configuration. Check the included load rings, penetration piston, surcharge weights and support bridge against the specified test requirements rather than assuming every set matches the same method revision.
For building a configuration from components, compare the Field CBR Loading Jack with the piston extension set and connector set. Verify compatibility across the selected components before combining them.
Check Accessories and Consumables
Review the piston diameter, extension lengths, dial indicator or transducer holders, and surcharge weights against the specified test. Consumable items such as filters and filter paper are ordered separately; check quantities before finalizing the order.
Supporting accessories, including the CBR Accessory Kit, do not automatically fit every jack or piston configuration. Match each item to the exact selected equipment rather than assuming interchangeability across models.
Plan the Test and Record Results
Follow the governing procedure for surface preparation, surcharge loading, penetration rate and reading intervals. Record piston size, loading arrangement, surcharge configuration and site conditions with the results so the bearing ratio can be interpreted appropriately.
Field CBR results support comparative subgrade evaluation; they do not replace the laboratory testing or engineering assessment a design may require. Confirm operator training and site safety arrangements before testing, and verify the governing method references for the selected set.
