Portland cement clinker in bulk

No.

Characteristics

Requirement

1

Moisture

≤ 1%

2

Content of free lime (f.CaO)

≤ 1.5%

3

Chemical composition

3.1

SiO₂

18 - 26%

3.2

Al₂O₃

3 - 8%

3.3

Fe₂O₃

2 - 5%

3.4

CaO

65% MINIMUM

3.5

MgO

≤ 3%

3.6

SO₃

≤ 0.75%

3.7

Na₂O td = Na₂O + 0,658 K₂O

≤ 0.9%

3.8

Loss on ignition (LOI)

≤ 1.0%

3.9

Insoluble residue content (IR)

≤ 0.75%

4

C3S

C2S

10-22%

C4AF

LSF

8% – 12%

0.92 – 1.02