Research Article
Impact of In Situ Soil in Soil-Bentonite Cutoff Wall Backfill on Compressibility and Hydraulic Conductivity
Table 2
Proportion of base mixtures for SB backfills.
| Sample ID | Type of backfill | Bentonite content in base mixture, BCM (%) | Mass ratio of sand to Nanjing clay by dry weight | Nanjing clay content in base mixture, NCM (%) |
| CB3.5 | SBB1 | 3.5 | — | 0 | CB5 | SBB | 5 | — | 0 | CB6 | SBB | 6 | — | 0 | CB8 | SBB | 8 | — | 0 | CB10 | SBB | 10 | — | 0 | CB12 | SBB | 12 | — | 0 | CB15 | SBB | 15 | — | 0 | CB0R0.5 | SCBB2 | 0 | 0.5 | 66.7 | CB3.5R6 | SCBB | 3.5 | 6 | 13.8 | CB3.5R4 | SCBB | 3.5 | 4 | 19.3 | CB3.5R2 | SCBB | 3.5 | 2 | 32.2 | CB3.5R1 | SCBB | 3.5 | 1 | 48.3 | CB3.5R0.5 | SCBB | 3.5 | 0.5 | 64.3 | CB8R6 | SCBB | 8 | 6 | 13.1 | CB8R4 | SCBB | 8 | 4 | 18.4 | CB8R2 | SCBB | 8 | 2 | 30.7 | CB8R1 | SCBB | 8 | 1 | 46.0 | CB8R0.5 | SCBB | 8 | 0.5 | 61.3 | R0.5 | — | 0 | 0.5 | 66.7 |
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1SBB: sand-bentonite backfill. 2SCBB: sand-clay-bentonite backfill.
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