Simultaneous Operations of Pregrouting and Shaft Drilling in Shaft Construction

Table 2

Technical requirements of Cl-C grout and the clay slurry.

Mixing proportion				Qualified Cl-C grout
Cement content	Dosage of water glass	Density of clay slurry	Initial funnel viscosity of clay slurry	Density	Sands content	Bleeding	Initial funnel viscosity
100–300 kg/m^3	10–30 L/m^3	1.12–1.24 g/cm^3	<20 s	1.20–1.35 g/cm^3	<5%	<5%	50 s–80 s