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The ERA 2013 and IS specifications for road construction (subgrade).
| SN | Subgrade Properties | Recommendation of ERA 2013 Specifcation | IS: 2911 Part III- 1980 |
|---|---|---|---|
| 1 | Liquid Limit (PL) (%) | <30 | |
| 2 | Plastic Limit (LL) (%) | <60 | |
| 3 | California Bearing Capacity (CBR) | >3 | |
| 4 | CBR Swell (%) | <2 | |
| 5 | Free Swell (%) | - | <20 |
