Table 12 Market prices of the A-liquids of different mix ratios in China
From: Use of a 10.22 m diameter EPB shield: a case study in Beijing subway construction
Materials | Water | Cement | Slurry | Retarder | SG | IST (s) | TP (¥/m3) | Evaluation |
|---|---|---|---|---|---|---|---|---|
1 | ||||||||
Mix ratio | 1 | 1 | 0.3 | 0.013 | 1.32 | 16 | 209.75 | The most reasonable |
Mass (kg) | 571 + 157.6 | 571 | 171.3 | 7.423 | ||||
728.6 | 13.7 | |||||||
Price (¥) | 4.4 | 179.9 | 6.85 | 18.6 | ||||
2 | ||||||||
Mix ratio | 1 | 0.9 | 0.3 | 0.01 | 1.27 | 35 | 188.64 | Merits: low price; defects: long setting time and unfit for construction |
Changed Mix ratio | 1.11 | 1 | 0.33 | 0.0111 | ||||
Mass (kg) | 574.7 + 158.6 | 517.19 | 172.40 | 5.747 | ||||
733.3 | 13.8 | |||||||
Price (¥) | 4.47 | 162.9 | 6.9 | 14.37 | ||||
3 | ||||||||
Mix ratio | 1 | 0.9 | 0.2 | 0.008 | 1.29 | 20 | 195.06 | Merits: low price; defects: long setting time and unfit for construction |
Changed Mix ratio | 1.11 | 1 | 0.22 | 0.009 | ||||
Mass (kg) | 611.95 + 112.6 | 550.76 | 122.39 | 4.896 | ||||
724.6 | 9.79 | |||||||
Price (¥) | 4.42 | 173.5 | 4.9 | 12.24 | ||||
4 | ||||||||
Mix ratio | 1 | 0.8 | 0.2 | 0.008 | 1.24 | 36 | 177.37 | Merits: low price; defects: long setting time and unfit for construction |
Changed Mix ratio | 1.25 | 1 | 0.25 | 0.01 | ||||
Mass (kg) | 617.53 + 113.63 | 494.02 | 123.51 | 4.94 | ||||
731.16 | 9.88 | |||||||
Price (¥) | 4.46 | 155.62 | 4.94 | 12.35 | ||||