Impact of In Situ Soil in Soil-Bentonite Cutoff Wall Backfill on Compressibility and Hydraulic Conductivity

Table 3

Physical properties of SB backfills tested in the study.

Sample ID	Initial water content, (%)	Slump, −ΔH (mm)	Total bentonite content, BC (%)	Fines fraction, FF^1 (%)	Clay size fraction, CF^2 (%)	Specific gravity, Gs	Liquid limit, (%)
CB3.5	30.3	109	6.6	6.6	3.3	2.63	ND^3
CB5	32.6	120	8.4	8.4	4.1	2.64	ND
CB6	35.1	112	9.6	9.6	4.7	2.64	ND
CB8	40.5	105	12.1	12.1	5.9	2.64	30.6
CB10	50.1	118	14.9	14.9	7.3	2.64	34.9
CB12	60.2	135	17.5	17.5	8.6	2.64	36.3
CB15	68.6	110	21.5	21.5	10.5	2.64	41.2
CB0R0.5	31.9	141	3.5	50.2	10.3	2.72	22.0
CB3.5R6	25.5	114	6.2	15.9	5.8	2.66	ND
CB3.5R4	26.6	131	6.4	19.9	6.7	2.67	ND
CB3.5R2	25.5	125	6.2	28.9	8.0	2.68	19.0
CB3.5R1	28.8	124	6.6	40.4	10.2	2.70	21.2
CB3.5R0.5	31.9	116	6.9	51.9	12.2	2.72	24.9
CB8R6	41.1	120	12.2	21.3	9.2	2.66	27.8
CB8R4	41.8	123	12.3	25.0	10.2	2.66	27.9
CB8R2	42.6	114	12.4	33.5	11.6	2.68	28.8
CB8R1	46.5	129	12.8	44.4	13.7	2.69	29.2
CB8R0.5	46.4	124	12.7	54.9	15.5	2.71	31.0
R0.5	28.1	127	0.0	48.3	12.7	2.72	ND

¹Fines fraction, particle size < 75 μm. ²Clay size fraction, particle size <2 μm. ³ND, cannot be determined.