Portland Cement Type I-425

Qeshm cement factory

Portland Cement Type I-425

This cement is in the middle of resistance type of type one cement, which has higher resistance than type 2 and 1-325 by maintaining the chemical properties of type 2 cement, and its mortar or concrete has medium strength in sulfate environments. Physical and chemical properties of type 1-425 cement (I-42.5) according to the national standard of Iran and the EN standard of this company are as follows:

Physical Specification

Compressive Strength

Setting time

Autoclave Expansion


Blaine

Cement Type

28 Days

7 Days

3 Days

2 Days

Final

Initial

410 ± 10 kg/cm²

-

-

200 ± 10 kg/cm²

250 ± 20

250 ± 20

< 0.15%

≥2900 cm²/gr

Qeshm Cement ISIRI

46 ± 1 Mpa

-

-

200 ± 10 MPa

250 ± 20

150 ± 10

< 2mm

-

Qeshm Cement EN

≥ 425 Mpa

≤ 625 Mpa

-

-

≥ 100kg/cm²

≤ 360

≥ 45

< 0.8%

≥2800 cm²/gr

ISIRI-389

≥ 42.5 Mpa

≤ 62.5 Mpa

-

-

≥ 10Mpa

-

≥ 60

≤ 10 mm

-

BS EN 197-1

-

≥ 19MPa

≥ 12MPa

-

≤375

≥45

<0.8%

> 260m²/kg

ASTM C-150

Chemical Specification

Cement Type

Qeshm Cement

ISIRI - 389

BS EN 197-1

ASTM

Other features of this product can be reduced cement consumption to achieve a stable strength of concrete, more durable concrete made with it than cement 1-325, the ability to mold earlier than cement 1-325, increase the speed of operation in construction Due to the high initial strength of concrete and increase the durability of concrete due to the gradual and continuous increase in strength and high final strength. This product is mostly used in general uses and normal weather conditions and where there is no problem of sulfate and chlorine and the need for fast setting of concrete, for example in the construction of sidewalks and paving roads and mortar of buildings and structures that have high strength Required such as: foundations, columns, bridges and tunnels are recommended.

Note: Consumption of this type of cement is not allowed in sulfated and chlorinated environments.