Grade

Average Grain 

size(mm)

Min. Density

(g/cm3)

Specific 

Resistance

(uq.m)

Compressive 

Strength

(Mpa)

Flexural Strength

(Mpa)

Ash

(ppm)

CTE

(×10-6/°C)

Elastic Modulus

Gpa

Shore Hardness

ZI-1B

0.022

1.85

11-13

80

40

500

4.5

11.5

55

ZI-2B

0.022

1.80

11-13

75

37

500

4.4

10.0

50

ZI-4S

0.022

1.80

<=15

65

33

700

4.5

11.5

50

ZI-8L

0.022

1.80

<=15

65

33

700

4.5

11.5

50

ZI-1D

0.022

1.80

<=15

65

33

1000

4.5

11.5

55

ZI-2D

0.020

1.80

<=15

80

40

1000

4.6

11.5

60

Normal Size:160 x 300x 550mm, 180 x 400 x 770mm, 400 x 400 x 400/500/600mm, 

Dia350/400/450/450 x 400-450mm, Dia500 x 350/550/600mm, Dia585 x 600mm