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Table 2 Expansive soil classification based on liquid limit

From: Characterization of structural failures founded on soils in Panyam and some parts of Mangu, Central Nigeria

Swell Potential

Liquid Limit (%)

Chen (1965)

Snethen et al. (1977)

Low

<  30

<  50

Medium/marginal

30 – 40

50–60

High

40 – 60

>  60

Very High

>  60

–