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We are providing three types of Ordinary Portland Cement.
Grade 42.5
Grade 43
Grade 53
Grade 42.5
Ordinary Portland Cement-Grade-42.5 is a high strength cement confirming of BSS 12/1996. The cement is ideally suitable for all kinds of normal constructions of buildings and residential units.
Chamical Analysis
Limits as per
PSS-232~1983(R)
Limits as per
B.S 12:1978
Cement's normal test results
L.O.I
Maximum 3.00
Maximum 4.00
1 ~ 2
I.R.
Maximum 1.50
Maximum 1.50
0.5 ~ 1
SiO2
---
---
2.0 ~ 2.2
Al2O3
---
---
5.2 ~ 5.6
Fe2O3
---
---
3.6 ~ 4.0
CaO
---
---
63.5 ~ 65.0
MgO
Maximum 4.00
Maximum 4.00
1.5~ 3.5
SO3
C3A < = 5.0%
Not > 3.0% when C3A > 5.0%
C3A < = 5.0%
Not > 3.0% when C3A > 5.0%
.7.5 ~ 2.8
L.S.F
0.66 ~ 1.02
0.66 ~ 1.02
0.90 ~ 1.92
Na2O
---
---
0.15 ~ 0.20
K2O
---
---
0.70 ~ 0.80
Free Lime
---
---
1.50 ~ 2.00
Alkali Eq.
---
---
0.65 ~ 0.75
C3S
---
---
50.00 ~ 55.00
C2S
---
---
20.00 ~ 25.00
C3A
---
---
6.00 ~ 9.00
C4AF
---
---
11.0 ~ 13.00
CI
---
---
Traces
Setting Time:
Initial Setting Time (Minutes)
Mimimum 45
Mimimum 45
90 ~ 110
Final Setting Time (Minutes)
Mimimum 600
Mimimum 600
150 ~ 210
Blaine cm2 / gm
Mimimum 2250
Mimimum 2250
2800 ~ 3150
Expansion (mm)
Mimimum 10
Mimimum 10
0.0 ~ 1.5 mm
Compressive Strength of Mortar Cubes
1 Day (PSI)
---
---
2500 ~ 2900
3 Day (PSI)
Mimimum 2200
Mimimum 3350
4000 ~ 4800
7 Day (PSI)
Mimimum 3400
---
4800 ~ 5700
28 Day (PSI)
Mimimum 5000
Mimimum 5950
6500 ~ 7200
Grade 43
Ordinary Portland Cement-Grade-43 is a high strength cement confirming of IS 8112:1989. The cement is ideally suitable for all kinds of normal constructions of buildings, commercial complexes and residential units.
CHEMICHAL ANALYSIS
Item
Results
Limits: As per IS 8112:1989 (Reaffimed 2005)
SiO2 (%)
20.30
Al2O3 (%)
5.04
Fe2O3 (%)
3.29
CaO (%)
63.54
MgO (%)
2.30
Not more than 6.0 %
K2O (%)
0.74
Na2O (%)
0.29
SO3 (%)
2.70
Not more than 2.5% and 3.0% when tricalcium aluminate percent by mass is 5% or less and greater than 5% respectively.
CI (%)
Nil
Loss on lgnition(LOI) (%)
0.63
Not more than 5.0%
LSF (Lime Saturation Factor) (%)
0.95
Not more than 1.02 & not less than 0.66
ALM (%)
1.53
Not less than 0.66
Insoluble Residue (IR) (%)
0.28
Not more than 2%
Tricalcium Aluminate (C3A) (%)
7.79
PHYSICAL ANALYSIS
Compressive Strenght (Mpa)
72 ± 1 Hour
38.80
Not less than 23 Mpa
168 ± 2 Hours
46.30
Not less than 33 Mpa
672 ± 4 Hours
56.50
Not less than 43 Mpa
Setting Time (Minutes)
Initial
146
Not less than 30 minutes
Final
195
Not more than 600 minutes
Expansioin
Le-Chatelier (mm)
1.0
Not more than 10 mm
Autoclave (%)
0.050
Not more than 0.8%
Specific Surface
Fineness (m2 / Kg)
288
Not less than 225 m2 / Kg
Grade 53
Ordinary Portland Cement-Grade 53: Having been certified with IS12269:1987 standards, Grade 53 is known for its rich quality and is highly durable. Hence it is used for constructing bigger structures like building foundations, bridges, tall buildings, and structures designed to withstand heavy pressure. Expert opinions and directions from technicians and engineers are a must in this regard. With a good distribution network this cement is available easily.
CHEMICHAL ANALYSIS
Item
Results
Limits: As per IS 8112:1989 (Reaffimed 2005)
SiO2 (%)
20.84
Al2O3 (%)
5.15
Fe2O3 (%)
3.23
CaO (%)
62.21
MgO (%)
1.85
Not more than 6.0 %
K2O (%)
0.63
Na2O (%)
0.15
SO3 (%)
2.88
Not more than 2.5% when C3A is less than 5% & not more than 3.0% when C3A is greater than 5%
In order to get best results from the use of this cement, it is recommended to use it correctly as specified by a structural engineer / expert technician and to pay attention to the required cement content, workability and right water-cement ratio, proper placement and compaction with required curing for the time period.
