an engineering geological characterisation of tropical clays - GBV

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Table 7.3. Atterberg limits, activity/ free swell classification and assessment of possible clay
mineralogy of black clays and red soils of this study.
Profile Sample No. Wn (%) LL (%) PL (%) PI (%) FS (%) Clay (%) Activity
F. swell
class
Activity class
(BS 1377: 1975)
Possible
clay
minerals
SA1-30cm 32 78 37 41 135 18 2,28 high highly active
A SA1-50cm 30 75 36 39 100 16 2,41 high highly active
SA2-30cm 34 93 39 54 135 26 2,07 high highly active
(black
clays) SA2-70cm 34 90 36 54 170 26 2,07 high highly active smectites
SA2-105cm 30 88 33 55 120 24 2,30 high highly active
SA28-30cm 26 85 40 45 125 23 1,96 high active
SA28-50cm 27 89 41 47 135 18 2,62 high highly active
SA37-30cm 19 81 38 43 115 32 1,33 high active
SA37-50cm 22 83 39 44 115 31 1,43 high active
SA37-80cm 23 85 39 46 115 34 1,35 high active
SA41-30cm 23 89 41 47 135 37 1,28 high active
SA41-50cm 25 90 41 49 120 44 1,10 high normal
SB1-30cm 23 82 34 47 125 30 1,58 high active
B SB1-50cm 27 84 36 48 135 26 1,83 high active
SB1-70cm 30 90 39 51 145 25 2,03 high highly active
(black
clays) SB5-30cm 24 81 34 47 120 29 1,62 high active smectites
SB5-50cm 27 85 37 48 135 25 1,92 high active
SB5-70cm 31 91 40 51 145 26 1,96 high active
SB7-30cm 23 83 35 48 130 31 1,56 high active
SB7-50cm 26 86 37 49 135 27 1,81 high active
SB7-70cm 30 87 38 49 140 26 1,87 high active
SB18-30cm 20 82 40 43 120 13 3,28 high highly active
SB18-50cm 20 72 34 39 120 14 2,77 high highly active
SB27-30cm 22 85 38 47 130 32 1,47 high active
SB27-50cm 22 88 39 49 130 33 1,47 high active
SB31-30cm 23 87 38 49 130 35 1,39 high active
SB31-50cm 23 86 38 48 130 30 1,61 high active
SB41-30cm 23 89 45 44 145 20 2,21 high highly active
SB41-50cm 24 91 44 47 145 22 2,14 high highly active
SB42-30cm 22 88 44 44 145 23 1,90 high active
SB42-50cm 21 91 45 47 145 21 2,22 high highly active
SC1-30cm 24 82 35 48 125 30 1,58 high active
C SC1-50cm 26 85 37 48 135 27 1,79 high active
SC5-30cm 23 83 35 48 125 31 1,56 high active
(black
clays) SC5-50cm 25 84 36 47 135 27 1,75 high active smectites
SC9-30cm 25 84 36 48 130 31 1,55 high active
SC9-50cm 26 85 37 48 135 27 1,76 high active
SC17-30cm 21 76 35 41 105 29 1,41 high active
SC17-50cm 22 81 33 48 110 27 1,79 high active
SC25-30cm 26 88 39 49 125 23 2,13 high highly active
SC25-50cm 26 89 41 48 145 18 2,64 high highly active
SC29-30cm 21 82 32 49 110 28 1,76 high active
SC29-50cm 20 80 37 43 110 26 1,67 high active
SC33-30cm 20 82 33 49 120 27 1,82 high active
SC33-50cm 21 83 33 50 120 28 1,78 high active
SC41-30cm 18 85 38 47 125 16 2,96 high highly active
SC41-50cm 17 84 37 47 125 19 2,47 high highly active