Table 2 Calculation parameters of permeability coefficient by RFP method.

F₀ = 10^–2–1

λ = A^1.61B^0.61

F₀ = 1–10

λ = A^1.39B^0.39

F₀ = 10–10²

λ = 1.10A^1.25B^0.25

F₀ = 10²–10³

λ = 1.83A^1.14B^0.14

F₀ = 10³–10⁵

λ = 2.10A^1.11B^0.11

F₀ = 10⁵–10⁷

λ = 3.14A^1.07B^0.07