Table 7 Expansive soil classification based on shrinkage index (IS 1498 (1970))
From: An investigation into the cause of road failure along Sagamu-Papalanto highway southwestern Nigeria
Degree of expansivity/swell potential | Shrinkage index (%) |
|---|---|
Low | < 15 |
Medium | 15–30 |
High | 30–60 |
Very high | > 60 |