an engineering geological characterisation of tropical clays - GBV

Results of swelling tests on black clays
Appendix C: Swelling tests
Swelling S (mm) is expressed as percentage of initial specimen thickness Ho (mm).
Table C1
Table C2
Swelling test: Sample No. SA2/70cm Swelling test: Sample No. SB1/70cm
Initial sample size
Initial sample size
Diameter (mm) 71,4 Diameter (mm) 71,4
Height Ho (mm) 11 Height Ho (mm) 11
X-Sectional area (m²) 0,004 X-Sectional area (m²) 0,004
Swelling pressure load (Kg) 33 Swelling pressure load (Kg) 15
Swelling pressure SP (kPa) 82,46 Swelling pressure SP (kPa) 37,48
Maximum swelling Smax (mm) 1,036 Maximum swelling Smax (mm) 0,425
Load
Swelling
(kg) (kPa) (mm) % Load Swelling
33 82,46 0,000 0,00 (kg) (kPa) (mm) %
16,5 41,23 0,106 0,96 15 37,48 0,000 0,00
8 19,99 0,253 2,30 7,5 18,74 0,054 0,49
4 10,00 0,321 2,92 4 10,00 0,126 1,15
2 5,00 0,539 4,90 2 5,00 0,197 1,79
1 2,50 0,725 6,59 1 2,50 0,279 2,54
0 0,00 1,036 9,42 0 0,00 0,425 3,86
Table C3
Table C4
Swelling test: Sample No. SC25/50cm Swelling test: Sample No. SC29/50cm
Initial sample size
Initial sample size
Diameter (mm) 71,4 Diameter (mm) 71,4
Height Ho (mm) 11 Height Ho (mm) 11
X-Sectional area (m²) 0,004 X-Sectional area (m²) 0,004
Swelling pressure load (Kg) 14,5 Swelling pressure load (Kg) 18
Swelling pressure SP (kPa) 36,23 Swelling pressure SP (kPa) 44,98
Maximum swelling Smax (mm) 0,475 Maximum swelling Smax (mm) 0,493
Load Swelling Load Swelling
(kg) (kPa) (mm) % (kg) (kPa) (mm) %
14,5 36,23 0 0,00 18 44,98 0 0,00
7 17,49 0,066 0,60 9 22,49 0,061 0,55
3,5 8,75 0,16 1,45 4,5 11,24 0,149 1,35
2 5,00 0,26 2,36 2 5,00 0,266 2,42
1 2,50 0,347 3,15 1 2,50 0,356 3,24
0 0,00 0,475 4,32 0 0,00 0,493 4,48