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Composite Portland Cement

Overview:
Composite portland cement is a hydraulic cementitious material made of Portland cement clinker, two or more kinds of specified mixed materials, and appropriate amount of gypsum. Code P · C. It is a kind of general cement.
grade:
P · C32.5 P · C32.5R
performance:
Superior performance: composite cement has low water demand, moderate setting time, good water retention, dry shrinkage, low hydration heat, good corrosion resistance, good crack resistance, large strength enhancement rate in the later period, and good concrete workability , Good compatibility with admixtures. Reliable quality: Through advanced technology and equipment, strict process quality control, the quality of composite cement is stable, and the product indicators are better than those in the national standard GB12958-1999.
use:
Composite cement is widely used in various industrial projects, civil buildings, suitable for various projects such as underground, large-scale concrete projects, foundation engineering and so on. It is not suitable for use in engineering parts where the water level rises and falls in severe cold areas.

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

Variety
project
Burn vector%
sulphur trioxide%
Magnesium oxide%
Fineness%
Stability
Setting time (h: min)
Intensity (Mpa)
Chloride%
Initial setting
Final coagulation
Anti-fold
Anti-stress
3 days
28 days
3 days
28 days
P · C
32.5
National standard
≤3.5
≤5.0
≤10.0
qualified
≥45
≤600
≥2.5
≥5.5
≥11.0
≥32.5
≤0.06
Enterprise standard
≤3.0
≤4.0
≤3.0
qualified
≥60
≤360
≥3.0
≥6.0
≥16.0
≥36.0
≤0.06
32.5R
National standard
≤3.5
≤5.0
≤10.0
qualified
≥45
≤600
≥3.5
≥5.5
≥16.0
≥32.5
≤0.06
Enterprise standard
≤3.0
≤4.0
≤3.0
qualified
≥60
≤360
≥4.0
≥6.0
≥20.0
≥38.0
≤0.06
(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%
SO 2 %
C2S + C 2 S%
Clinker
≤1.5
≤4.0
≤1.5
≤0.75
≤1.0
≥70
project
CaO / SiO 2 %
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