Experimental Study of Reinforcing Broken Gangues by Colloid Cement Slurry

Table 5

Differentials of orthogonal tests.

Items	Analysis index	Results of compressive strength		Results of elastic modulus		Conclusion of compressive strength	Conclusion of elastic modulus
		A	B	A	B
7 d age	K1	8.78	11.68	1.591	1.683	Priority	Priority
	K2	11.145	10.2	1.964	2.121	A > B	A > B
	K3	12.895	—	2.151	—	Optimal group of compressive strength
	R	4.115	1.48	0.56	0.438	A3B1
14 d age	K1	13.265	16.581	2.377	2.329	Priority	Priority
	K2	15.068	11.291	2.448	2.39	B > A	A > B
	K3	13.474	—	2.253	—	Optimal group of compressive strength
	R	1.803	5.29	0.195	0.061	A2B1
21 d age	K1	17.824	19.933	2.85	2.593	Priority	Priority
	K2	17.766	13.685	2.814	2.779	B > A	A > B
	K3	14.837	—	2.395	—	Optimal group of compressive strength
	R	2.987	6.248	0.455	0.186	A1B1
28 d age	K1	20.551	25.695	3.263	3.203	Priority	Priority
	K2	23.713	16.706	3.389	3.227	B > A	A > B
	K3	19.338	—	2.993	—	Optimal group of compressive strength
	R	4.375	8.989	0.396	0.024	A2B1