Experimental Study on Physical-Mechanical Properties of Expansive Soil Improved by Multiple Admixtures

Table 5

L₉(3⁴) orthogonal test scheme.

	Factors
Group number	A (coal gangue) %	B (fly ash) %	C (lime) %	Null column
0	0	0	0	–
1	6	7	2	1
2	6	9	4	2
3	6	11	6	3
4	8	7	4	3
5	8	9	6	1
6	8	11	2	2
7	10	7	6	2
8	10	9	2	3
9	10	11	4	1