Study on Modification of Alkali-Free Liquid Accelerator of Mine-Used Wet-Mix Shotcrete

Table 5

Statistical table of measurement results of surface tension and contact angle.

Modifier volume (%)	Surface tension (mN/m)			Average surface tension (mN/m)
0	69.75	70.292	71.457	70.500
1.0	65.208	64.125	63.917	64.417
2.5	55.333	52.958	52.292	53.528
5.0	43.708	44.167	43.75	43.875