Portland Cement Type 525-1, according to Iranian National Standard No. 389, is classified as Type 1 Portland Cement with a strength rating of 525 kg/cm².
This cement is suitable for concrete structures that require fast formwork removal and rapid load-bearing, and is ideal for ordinary concreting as well as large-volume pours in cold weather where maintaining a concrete temperature above 5°C is critical.
The 525-1 cement produced by this plant, due to high-quality raw materials, advanced machinery, and precise production control, maintains consistent quality and offers superior properties compared to the standard values.
This cement corresponds to the European CEM I 525 N strength class.

Key Features of Portland Cement Type 525-1

• 28-day compressive strength of 555 ± 20 kg/cm².
• Fast formwork removal and early strength gain, especially in cold climates.
• Possibility to reduce cement dosage to achieve the same concrete strength.
• Due to its chemical and physical properties, this cement can also be used as a substitute for Type III Portland Cement.