Mixing Ratios and Cementing Mechanism of Similar Silty Mudstone Materials for Model Tests

Table 8

Range analysis of rock density.

Evaluation indexes	Density (g/cm^3)
	Factor A (water content)	Factor B (barite powder ratio)	Factor C (gypsum mass)	Factor D (clay mineral ratio)
K1	1.88	2.02	2.04	1.99
K2	2.00	1.98	2.01	1.97
K3	2.03	1.97	1.95	1.97
K4	2.03	1.96	1.93	2.00
Range value R	0.15	0.06	0.11	0.04
Rank	1	3	2	4

Note. K_i (i = 1, 2, 3, 4) represents the mean of the density values corresponding to level i of a factor; R = max(K_i) − min(K_i) (i = 1, 2, 3, and 4).