Table 11 Test results of the A-liquid
From: Use of a 10.22 m diameter EPB shield: a case study in Beijing subway construction
Place of origin of the sodium bentonite | Mix ratio of the A-liquid in mass | Density (g/cm3) | Funnel discharge time (s) | ||||
|---|---|---|---|---|---|---|---|
Water | Cement | Retarder | Concentration of the bentonite slurry | ||||
8% | 9% | ||||||
Weifang of Shandong Province, red appearance | 1 | 1 | 0.016 | 3.52 | 1.16 | 38.37 | |
1 | 1 | 0.016 | 3.13 | 1.19 | 115 | ||
Chengde of Hebei Province, yellowish white appearance | 1 | 1 | 0.016 | 3.52 | 1.19 | 37.66 | |
1 | 1 | 0.016 | 3.13 | 1.20 | 65.84 | ||