A CBR (California Bearing Ratio) testing machine is a device used in soil mechanics to evaluate the load-bearing capacity of highway sub-bases and sub-grades. It consists of a frame that pushes a penetration piston into a compacted soil sample at a constant rate, while measuring the load and the piston's penetration depth. The machine is used to calculate the CBR value, which indicates the strength of the soil.
Key components and functions
Frame:
A robust frame, often with two columns, holds the testing assembly and includes an electromechanical ram for the loading process.