Conversion for a penetrometer

[craiggeotech]

Hi can someone please help me. I am trying to convert the measurements on my penetrometer to undrained shear strength. The measurements on the penetrometer are in kg/cm2 and I need to convert this measurement to kN/m2. Can anyone please help me?

 

[GeoPaveTraffic]

The relation between penetrometer (unconfined compression) and undrained shear is 2, i.e. you divid the penetrometer reading by 2. That will give you undrained shear in kg-force/cm2.

1 kg-force equals 9.807N = 0.009807KN
1 cm2 = 1x10-4 m2

therefore 1kg/cm2 = 98.07 KN/m2 = 1.02 ksf