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Ordinary Portland Cement

Overview: Ordinary Portland Cement is our company's leading product. It is a hydraulic cementitious material made of Portland cement clinker, a small amount of mixed materials, and an appropriate amount of gypsum.


Grade: P · ○ 32.5 P · ○ 32.5R P · ○ 42.5 P · ○ 42.5R P · ○ 52.5 P · ○ 52.5R / dd>

Performance: good workability, fast coagulation and hardening, high early strength, large increase rate in later period, high affluent strength, stable quality, freeze resistance, and impermeability.

1. Good workability: By optimizing the mineral composition and controlling the optimal particle gradation and morphology of the cement, the cement requires less water, and the configured concrete has good water retention and good cohesion.

2. Fast setting and hardening, high early strength: It can improve the early strength of concrete, which is conducive to early removal of formwork, early use, and quicker construction progress.

3. Strong affluence and stable quality: It can save costs, help to control the temperature rise of hydration, dry shrinkage, and improve the durability of concrete.

4. Good frost resistance and impermeability: It is beneficial to improve the durability of the building.


5. Has good compatibility with admixtures.


                                                       

Comparison table between national standards and our company's internal control indicators


Uses: Ordinary Portland Cement is a variety of widely used cements. It is generally used in military, industrial, civil and other projects. It can be configured with special requirements such as high-strength, high-performance concrete and antifreeze concrete in various parts of the ground and underground.


Variety
Item
burn Vector percent
sulphur trioxide%
Magnesium oxide%
Fineness%
Stability
Setting time (h: min)
Intensity (Mpa)
Initial setting
Final coagulation
Anti-fold
Anti-stress
3 days
28 days
3 days
28 days
P · O
32.5
National standard
≤5.0
≤3.5
≤5.0
≤10.0
qualified
≥45
≤60: 0
≥2.5
≥5.5
≥11.0
≥32.5
Enterprise standard
≤4.5
≤3.0
≤4.0
≤4.0
qualified
≥60
≤30: 0
≥3.5
≥6.0
≥15.0
≥36.0
32.5R
National standard
≤5.0
≤3.5
≤5.0
≤10.0
qualified
≥45
≤60: 0
≥3.5
≥5.5
≥16.0
≥32.5
Enterprise standard
≤4.5
≤3.0
≤4.0
≤4.0
qualified
≥60
≤30: 0
≥4.0
≥6.0
≥20.0
≥36.0
42.5
National standard
≤5.0
≤3.5
≤5.0
≤10.0
qualified
≥45
≤60: 0
≥3.5
≥6.5
≥16.0
≥42.5
Enterprise standard
≤4.0
≤3.0
≤3.5
≤4.0
qualified
≥60
≤30: 0
≥4.0
≥7.0
≥20.0
≥46.0
42.5R
National standard
≤5.0
≤3.5
≤5.0
≤10.0
qualified
≥45
≤60: 0
≥4.0
≥6.5
≥21.0
≥42.5
Enterprise standard
≤4.0
≤3.0
≤3.5
≤4.0
qualified
≥60
≤30: 0
≥4.5
≥7.0
≥25.0
≥46.0
52.5
National standard
≤3.5
≤3.5
≤5.0
≤10.0
qualified
≥45
≤39: 0
≥4.0
≥7.0
≥23.0
≥52.5
Enterprise standard
≤3.0
≤3.2
≤3.5
≤4.0
qualified
≥45
≤30: 0
≥4.5
≥7.5
≥26.0
≥56.5
52.5R
National standard
≤3.5
≤3.5
≤5.0
≤10.0
qualified
≥45
≤39: 0
≥5.0
≥7.0
≥27.0
≥52.5
Enterprise standard
≤3.0
≤3.2
≤3.5
≤4.0
qualified
≥45
≤30: 0
≥5.5
≥7.5
≥29.0
≥56.0

(Note: "National Standard" in the table is: National Standard for Composite Portland Cement GB12958-1999)

"Crystal Blue" Brand Portland Cement Clinker Technical Standard


project
F-CaO%
MgO%
Burn vector%
Insolubles%
SO2%
C2S + C2S%
Clinker
≤1.5
≤4.0
≤1.5
≤0.75
≤1.0
≥70
project
CaO / SiO2%
Stability
Setting time (min)
Compressive strength (Mpa)
Initial setting
Final coagulation
3 days
28 days
Clinker
≥2.2
qualified
≥60
≤300
≥26.0
55.0