Table 4 Properties of the foaming agent
From: Use of a 10.22 m diameter EPB shield: a case study in Beijing subway construction
Items | Index |
|---|---|
Appearance | Colorless transparent liquid |
Water solubility | Completely soluble |
Density, 25 °C | 1.01 ± 0.02 g/cm3 |
PH value | 7–8 |
Foaming capacity (Ross–Miles) | ≥220 mm |