Research on Pump Primers for Friction Reduction of Wet-Mix Shotcrete Based on Precreating Lubricating Layer

Table 2

Optimal mix-design proportions for properties of new primers.

Optimal mix proportions	A (%)	B (%)	C (%)	D (%)
Apparent viscosity	0.75	1	0.3	0.2
Coating weight	0.25	1	0.3	0.6
FR	0.75	0.75	0.3	0.2
Contact angle	0.5	1	0.3	0.2