Shear Strength and Compression Coefficient for Conditioned Sand Subjected to Earth Chamber Stress Levels

Table 1

Basic parameters of the surfactant and foam.

Surfactant parameter	Index	Foam parameter	Value
Surfactant type	ELCO SF-301B	Surfactant concentration, Cf (%)	7
Appearance	Colorless transparent liquid	Half-life (min)	28
Water solubility	Completely dissolved	Foam expansion ratio, FER0 (−)	31
Density, 25°C	1.01 ± 0.02	Foam injection ratio, FIR0 (%)	20, 40, and 60
pH value	7 – 8	—	—
Foaming capacity (mm)	≥220	—	—