Portland Cement Type 2-42.5

Portland Cement Type 2, strength class 42.5, is produced in full compliance with the specifications set out in Iranian national standard INSO-389 and the European CE standard. This type of cement is mostly used for general purposes, the construction of concrete structures, bridges, water tanks, silos and building materials.

Some of the properties of Portland Cement Type 2 are given in the table below:

Chemical Properties

Composition	Value
SiO₂	20 to 23
Al₂O₃	4.8 to 5.5
Fe₂O₃	3.5 to 4.3
CaO	63.5 to 66
MgO	≤ 3
SO₃	≤ 3
Na₂O	≤ 1
K₂O	≤ 1
L.O.I	≤ 3
IR	≤ 2
Cl	≤ 0.05
C₃A	≤ 8

Physical Properties

Physical property	Value
Autoclave expansion (%)	≤ 0.25
Blaine (m²/kg)	≤ 370
Initial setting time (minutes)	≥ 125
2-day compressive strength (MPa)	≥ 25
28-day compressive strength (MPa)	≥ 48