California Bearing Ratio Test - Soil Properties: Testing, Measurement, and Evaluation - page 409

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

4.0 %

CBR at 0.10-in. penetration 100

1,000

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

3.8 %

CBR at 0.20-in. penetration

100

1,500

4.0

Design CBR %

409