Mexe Probe
The Soil Assessment Cone Penetrometer (SACP or MEXE Probe) is a lightweight instrument for rapidly measuring the insitu in-depth resistance to penetration, indicating with a dial, in terms of California Bearing Ratio (CBR).
Mexe probe kit. Developed in conjunction with the UK Ministry of Defence, the Mexe probe is a robust and reliable instrument used throughout the world by both commercial and military establishments.
Measurement range for CBR is from 0-15% CBR.
Soil trafficability measurements can be made using the Cone Index (CI) range.
Soil trafficability measurements can be made using the Cone Index (CI) range.
The linear CI range is from 0-300 and has 60 divisions, each of 11.12N (1.13kgf). Full deflection is 667N (67.9kgf).
Steady penetration of the cone into the soil is required and readings are taken from the dial at 75mm (3”) intervals during penetration to a maximum depth of 600mm (24”).
In fine-grained soils, for which the SACP is primarily intended, measurements correlate closely with CBR values, measured in-situ with conventional equipment.
The probe is pushed through the soil using constant force enabling the technician read the estimate CBR value from the dial.
This variant of the CBR test is only used for cohesive or sandy materials and reads CBR values up to 15%.
