Skip to main content

Table 7 Recorded slumps of the samples using the first recipe (unit:mm)

From: Use of a 10.22 m diameter EPB shield: a case study in Beijing subway construction

BIR of the 8% bentonite slurry (%) 4.0 6.0 8.0
FIR of the foam liquid (5% of Concn and 10 of FER) (%)
 10 105 140 179
 15 124 166 199
 30 151 189 215
FIR of the foam liquid (5% of Concn and 12 of FER) (%)
 10 102 137 175
 15 117 165 192
 30 143 185 211
FIR of the foam liquid (5% of Concn and 15 of FER) (%)
 10 98 130 164
 15 103 138 176
 30 118 155 190
  1. The italics in the tables present the results with the most appropriate FER of the foam liquid