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

Table 12

Range analysis of tensile strength.

Evaluation indexes	Tensile strength (MPa)
	Factor A (water content)	Factor B (barite powder ratio)	Factor C (gypsum mass)	Factor D (clay mineral ratio)
K1	3.25	2.42	2.61	2.79
K2	2.11	2.76	2.81	2.89
K3	1.79	2.21	2.64	2.56
K4	3.63	3.39	2.73	2.54
Range value R	1.84	1.17	0.19	0.36
Rank	1	2	4	3