White Portland Cement
CEM I 52.5 N
CEM I 52.5 R
CEM II/B-LL 42.5 N
Manufactured from some of the earth’s most common minerals – limestone and shale – Portland cement is combined with stone, sand and water to create a chemical reaction that becomes concrete.
The limestone and shale are finely ground and moved through a kiln, where they are burned at 2800 degrees Fahrenheit to form a new material called clinker. A small amount of gypsum is blended with the clinker and then ground again into a fine powder to form cement.
Modern Portland cement can trace its roots to 1756 when a British civil engineer experimented with various limestones and additives to construct a lighthouse. The name “Portland” comes from the cement’s similarity to Portland stone, which is quarried in England on the Isle of Portland.
Monarch has been creating high-quality Portland cement at our Humboldt plant since it opened, and all of our Portland cements conform to ASTM C-150.
Type I – Otherwise known as normal Portland cement, Type I is a common-purpose cement for general construction uses, including pavements, concrete buildings, floors, precast concrete products and other uses.
Type I/II – Our Type I/II Portland cement meets the requirements of both Type I and Type II, including strength and composition requirements, and can be used in projects where either type is required. More cost-effective than storing both types, Type I/II can be used on most concrete construction projects, including those that expose the concrete to harsh environmental conditions.
Type III – Ground finer with a quicker reaction time than Type I, concrete made with Type III has a high early strength rate. It has a higher 28-day strength than Type I, achieving approximately 70 percent of that strength after three days.
Type V – Type V cement can be utilized when high sulfate resistance is required, such as in structures exposed to soils or ground waters with a high sulfate content. Type V cement generally develops strength at a slower rate than Type I and has a lower heat of hydration.
Description of white portland cement 42.5
White Portland cement refers to a hydraulic cementitious material made from finely ground white Portland cement clinker with low iron oxide content, appropriate amount of gypsum and mixed materials (limestone and kiln dust), referred to as White Portland cement,
P.W42.5 grade White Portland cement is an early-strength, non-radioactive, green and environmentally friendly product. The product has high whiteness, high strength, low alkalinity, good atmospheric stability, and bright and bright color.
Parameters of white portland cement 42.5
Item |
Actual test value |
||
Strength |
1 day |
3 days |
28 days |
Flexural strength, Mpa |
4.0 |
5.0 |
8.0 |
Compressive strength, Mpa |
16.0 |
32.0 |
46.0 |
Fineness, 80um,% |
≤0.4% |
||
Initial setting time, min |
150 |
||
Final setting time, min |
230 |
||
Whiteness |
≥89.0 |
Storage of white portland cement 42.5
Store in a dry, ventilated and cool place, strictly prevent moisture, isolate the cement from the ground with a pallet, and store the product for 3 months.
Packing specification of white portland cement 42.5
25kg, 40kg, 50kg paper-plastic composite bag.
1200kg ton bag.
Characteristics
|
Unit
|
Specification / CEM I/ 42.5N
|
Result
|
Test methods
|
Compressive strength
|
Mpa
|
|
EN 197-1
|
|
After 2 days
|
≥ 10
|
21.8
|
||
After 7 days
|
|
34.8
|
||
After 28 days
|
≥ 52.5
|
47.8
|
||
Setting time:
|
|
|
EN 196-1
|
|
– Initial time
|
Min
|
≥ 45
|
120
|
|
– Final time
|
≤ 420
|
170
|
||
SiO2
|
%
|
|
21.44
|
EN 196-3
|
Al2O3
|
%
|
|
5.08
|
EN 196-4
|
Fe2O3
|
%
|
|
3.06
|
EN 196-5
|
CaO
|
%
|
58.58
|
EN 196-6
|
|
MgO
|
%
|
≤ 5
|
2.46
|
EN 196-7
|
SO3
|
%
|
≤ 5≤ 3.5
|
2.03
|
EN 196-2
|
Loss on Ignition (LOI)
|
%
|
≤ 5
|
4.75
|
|
Insoluble Residue (IR)
|
%
|
≤ 5
|
2.93
|
|
Cl- content
|
%
|
≤ 0.1
|
0.02
|