Research Article

Study on Relationship between UCS of Cemented Tailings Backfill and Weight Losses of Hydration Products

Table 4

Relationship model of strength and weight losses of hydration products.

Type of CTBConcentration (%)The model equationR2

GP-CTB65Rc = 0.0256 + 1.8251x10.8749
68Rc = −0.3204 + 2.3223x10.7867
70Rc = −0.2756 + 2.4557x10.9087
72Rc = 0.3006 + 2.6276x10.8008
75Rc = −1.1966 + 4.7837x10.7415
78Rc = 0.8783 + 5.0632x10.7046

OPC-CTB65Rc = −1.0637 + 0.9820x1 + 2.7345x20.7834
68Rc = −1.9223 + 1.8580x1 + 2.0974x20.8040
70Rc = −0.7184 + 0.9294x1 + 3.2307x20.7692
72Rc = −2.5127 + 2.4890x1 + 3.1285x20.8084
75Rc = −4.1528 + 3.9300x1 + 5.3372x20.8343
78Rc = −3.2128 + 2.8356x1 + 6.7251x20.8319

Rc is the UCS of CTB, MPa; x1 is the weight loss of C-S-H gel, %; x2 is the weight loss of Ca(OH)2, %; R2 is the correlation coefficient.