Values of ϕ′t and c′t for sodium montmorillonite at different effective normal stress levels, obtained by the proposed rectangular hyperbolic approach
| 0 mg/l Ca2+ | 80 mg/l Ca2+ | 160 mg/l Ca2+ | 240 mg/l Ca2+ | 320 mg/l Ca2+ | 400 mg/l Ca2+ | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ϕ′t : deg | c′t : kPa | ϕ′t : deg | c′t : kPa | ϕ′t : deg | c′t : kPa | ϕ′t : deg | c′t : kPa | ϕ′t : deg | c′t : kPa | ϕ′t : deg | c′t : kPa | |
| 0 | 4·8 | 0 | 11·4 | 0 | 11·3 | 0 | 10·6 | 0 | 12·3 | 0 | 11·4 | 0 |
| 25 | 4·7 | 0·02 | 10·8 | 0·14 | 10·8 | 0·11 | 10·2 | 0·08 | 11·6 | 0·16 | 10·9 | 0·10 |
| 50 | 4·6 | 0·06 | 10·2 | 0·54 | 10·3 | 0·43 | 9·9 | 0·31 | 10·9 | 0·58 | 10·5 | 0·39 |
| 100 | 4·5 | 0·25 | 9·1 | 1·94 | 9·5 | 1·59 | 9·3 | 1·14 | 9·8 | 2·09 | 9·7 | 1·44 |
| 150 | 4·4 | 0·54 | 8·2 | 3·93 | 8·7 | 3·28 | 8·7 | 2·41 | 8·9 | 4·23 | 9·0 | 3·01 |
| 200 | 4·2 | 0·93 | 7·5 | 6·33 | 8·0 | 5·38 | 8·2 | 4·03 | 8·0 | 6·81 | 8·4 | 4·97 |
| 0 mg/l Ca2+ | 80 mg/l Ca2+ | 160 mg/l Ca2+ | 240 mg/l Ca2+ | 320 mg/l Ca2+ | 400 mg/l Ca2+ | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ϕ′t : deg | ϕ′t : deg | ϕ′t : deg | ϕ′t : deg | ϕ′t : deg | ϕ′t : deg | |||||||
| 0 | 4·8 | 0 | 11·4 | 0 | 11·3 | 0 | 10·6 | 0 | 12·3 | 0 | 11·4 | 0 |
| 25 | 4·7 | 0·02 | 10·8 | 0·14 | 10·8 | 0·11 | 10·2 | 0·08 | 11·6 | 0·16 | 10·9 | 0·10 |
| 50 | 4·6 | 0·06 | 10·2 | 0·54 | 10·3 | 0·43 | 9·9 | 0·31 | 10·9 | 0·58 | 10·5 | 0·39 |
| 100 | 4·5 | 0·25 | 9·1 | 1·94 | 9·5 | 1·59 | 9·3 | 1·14 | 9·8 | 2·09 | 9·7 | 1·44 |
| 150 | 4·4 | 0·54 | 8·2 | 3·93 | 8·7 | 3·28 | 8·7 | 2·41 | 8·9 | 4·23 | 9·0 | 3·01 |
| 200 | 4·2 | 0·93 | 7·5 | 6·33 | 8·0 | 5·38 | 8·2 | 4·03 | 8·0 | 6·81 | 8·4 | 4·97 |
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