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STAR Cement's product range includes the following. |
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1. OPC – TYPE I – Bulk and Bag / 50kg |
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2. SRC – TYPE V – Bulk and Bag / 50kg |
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3. MSRC – TYPE II – Bulk
4. PLC
5. GGBS |
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4. Blended Cements – Bulk |
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All of the above complies to well-known international norms like BS / EN / ASTM. |
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A test certificate can be made available on request. |
Chemical Composition |
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Parameters |
Typical |
Std. Specification |
Significance |
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Silicon Dioxide (SiO2) % |
20.60 ± 0.50 |
Not Specified |
--- |
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Aluminium Oxide (Al2O3) % |
5.40 ± 0.30 |
- do - |
--- |
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Ferric Oxide (Fe2O3) % |
3.60 ± 0.30 |
- do - |
--- |
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Calcium Oxide (CaO) % |
64.10 ± 0.50 |
- do - |
--- |
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Magnesium Oxide (MgO) % |
AS LOW POSS. |
Max. 6.0 |
Controlled MgO provides excellent soundness. |
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Sulfur Trioxide (SO3) % |
2.60 ± 0.25 |
Max. 3.50 |
Controls setting time and optimises strength. |
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Loss on Ignition (LOI) % |
AS LOW POSS. |
Max. 3.00 |
Undeteriorated cement. |
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Insoluble Residue (IR) % |
AS LOW POSS. |
Max. 0.75 |
Indicates proper processing. |
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Alkalies (0.658K2O+Na2O) % |
AS LOW POSS. |
Max. 0.60(optional) |
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Tricalcium Silicate (C3S) % |
54.0 ± 4.0 |
Not Specified |
Facilitate early strength development. |
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Tricalcium Aluminate (C3A) % |
8.30 ± 0.30 |
--- |
Improved concrete resistance to acidic corrosion and erosion effect. |
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Tetra Calcium Alumino Ferrite (C4AF) % |
11.0 ± 1.0 |
Not Specified |
Imparts optimum shade to the cement. |
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Physical and Mechanical Characteristics |
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Parameters |
Typical |
Std. Specification |
Significance |
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Fineness – Blaine M2/Kg. |
325 ± 10 |
Min. 280 |
Contributes to improved workability and faster rate of hydration. |
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Setting Time - Vicat Test
Initial - Minutes
Final - Minutes |
140 ± 30
250 ± 30 |
Min. 45
Max. 375 |
Controlled hardening to improve workability. |
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Air Content % |
10.50 ± 1.0 |
Max. 12
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Autoclave Expansion % |
0.01± 0.005 |
Max. 0.8 |
Excellent soundness. |
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Compressive Strength – PSI
3 Days
7 Days
28 Days |
3200 ± 200
4000 ± 200
5200 ± 200
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Min. 1800
Min. 2800
Min. 4000 (Optional) |
Excellent early strength build-up.
Excellent strength.
Excellent later strength. |
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Heat of Hydration
7 Days Cal/gm |
90 ± 10 |
Not Specified |
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