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Portland cement type 2
Portland cement type 2:
The composition of cements Type 2 (which is also known as Modified Portland cement) is in a way that compared to Portland cement type 1, has lower temperature when mixed with water (which usually reduces the strength of the concrete) and furthermore, it has increased strength against the damaging sulfate environmental (gypseous lands and those affected by sea water). Moreover, Hormozgan Cement Co. has succeeded to provide a composition in its Portland cement type 2, which in addition to keeping the 2 mentioned features, it can keep the initial strength as same as Portland cement type 1, so that the observation period (keeping the moisture) following the use of the concrete made of this cement is reduced.
 

 
chemical composition

 

(%)

 

(%)

MIN

MAX

MIN

MAX

 Silicon Dioxide  

SiO2

20.50

22.0

Insoluble Residue

I.R.

0.10

0.70

Aluminium Oxide 

Al2O3

4.60

5.30

Free Lime

Free CaO

0.70

1.40

 Ferric Oxide  

Fe2O3

3.50

4.00

Lime Saturation Factor 

 LSF

92.0

97.0

 Calcium Oxide

CaO

63.00

65.00

Silica Module

 SiM

2.40

2.60

Magnesium Oxide

MgO

1.50

2.50

Alomina Module

AlM

1.20

1.40

Sulphur Trioxide  

SO3

1.50

2.50

Tricalcium Silicate

C3S

50.00

60.00

Potassium Oxide

K2O

0.50

0.70

Dicalcium Silicate

C2S

15.00

25.00

 Sodium Oxide  

Na2O

0.30

0.50

Tricalcium Aluminate

C3A

5.00

8.00

 Loss on Ignition 

L.O.I

1.00

2.50

Tetracalcium Alumino Ferrite

C4AF

10.00

12.00



 

 

physical properties

 

 

MIN

MAX

Fineness 

Blaine test

(cm2/g)

2900

3200

Expansion

Autoclave

(%)

0.05

0.16

Setting time:

Initial

(minute)

120

160

Final

(minute)

170

310

Compressive Strenght:

After 3 days

(kg/cm2)

200

250

After 3 days

(kg/cm2)

270

320

After 3 days

(kg/cm2)

350

420





LSF=100×CaO/[(2.8×SiO2)+(1.18×Al2O3)+(0.65×Fe2O3)]

C3S=(4.071×CaO)-(7.6×SiO2)-(6.718×Al2O3)-(1.43×Fe2O3)-(2.852×SO3)

C2S=(2.867×SiO2)-(0.754×C3S)

C3A=(2.65×Al2O3)-(1.692×Fe2O3)

C4AF=(3.043×Fe2O3)

Review: 2174
Date: 2015/11/09
Notices of Hormozgan Cement Co. in Codal System
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Sepah Bank
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