Chemical composition (%. w/w)

SiO₂

Al₂O₃

Fe₂O₃

MnO

MgO

CaO

Na₂O

K₂O

TiO₂

P₂O₅

LoI**

56.8

17.5

10.2

0.6

2.1

0.4

0.9

2.4

1

0.1

8.7

Geometrical grading characteristics

Shale

(mm)

d₁₀

(mm)

d₆₀

(mm)

UC

Porosity

(%)

Apparent density

(g·cm⁻³)

Actual density (g·cm⁻³)

K*

(m·s⁻¹)

1-2

1.79

0.95

0.53

50

1.14

2.4

3.2 × 10⁻²