Microbial-Induced Carbonate Precipitation for Strengthening Soft Clay

Table 5

Unconfined compressive strength of soft clay specimens (curing time 28 d).

Specimen no.	Nutrient concentration (mol/L)	Relative CaCO3 content (%)	Average CaCO3 content (%)	Stress (kPa)	Average stress (kPa)
0.00 a	0.00	—	—	20.29	17.89
0.00 b	0.00	—		15.48
0.50 a	0.50	2.7	2.3	44.94	43.31
0.50 b	0.50	1.8		41.67
0.75 a	0.75	2.8	2.5	30.30	28.89
0.75 b	0.75	2.2		27.47
1.00 a	1.00	3.5	2.7	31.11	30.19
1.00 b	1.00	1.8		29.26