California Bearing Ratio Test - Soil Properties: Testing, Measurement, and Evaluation - page 413

corrected penetration stress
for 0.10 - in. penetration (from
curve of penetration stress
versus penetration)

CBR at 0.10 - in. penetration

100 %

1,000

corrected penetration stress
for 0.20 - in. penetration (from
curve of penetration stress
versus penetration)

CBR at 0.20 - in. penetration

100

%

1,500

Design CBR %

413