Table 5 Orthogonal design levels for the mudstone-like materials.

From: Application of clay minerals in the synthesis of cretaceous mudstones and microstructural analysis of their deterioration mechanism

Level

Factor A

Factor B

Factor C/%

Factor D/%

1

4:1

1:4

0

0

2

7:3

2:3

20

20

3

3:2

3:2

40

40

4

1:1

4:1

60

70

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