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Table 9 Recorded slumps of the samples using the third recipe (unit:mm)

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

BIR of the 10% bentonite slurry (%) 4.0 6.0 8.0
FIR of the foam liquid (3% of Concn and 10 of FER) (%)
 10 77 110 153
 15 95 135 170
 30 120 161 189
FIR of the foam liquid (3% of Concn and 12 of FER) (%)
 10 70 109 144
 15 89 129 163
 30 111 156 185
FIR of the foam liquid (3% of Concn and 15 of FER) (%)
 10 65 102 135
 15 72 110 147
 30 85 125 164
  1. The italics in the tables present the results with the most appropriate FER of the foam liquid