From: An investigation into the cause of road failure along Sagamu-Papalanto highway southwestern Nigeria
Swell potential (Holtz and Gibbs 1956)
Shrinkage limit (%)
Volume change (Altmeyer 1956)
Low
> 15
Non-critical
> 12
Medium
10–16
Marginal
10–12
High
7–12
Critical
< 10
Very high
< 11
Volume change