Portland cement type 1

Portland cement type 1-42.5:

Because of its advance resistivity, this type of cement is one of the most popular cements in the world. It can be used for normal constructions which have no limitation of environmental conditions (e.g. water, sand and …). But, because of high temperature of hydration, the usage of the cement type 1-42.5 is not suggested for warm area (e.g. Hormozgan Providence). There is also limitation of using this type of cement for gypseous lands or those affected by sea water, because of low strength against sulfate attacks. In spite of the mentioned limitation, Hormozgan Cement Co. has tried to reduce the environmental vulnerability of the concrete following the usage of this product.
chemical composition
(%) (%)
MIN MAX MIN MAX
Silicon Dioxide SiO2 20.00 22.00 Insoluble Residue I.R. 0.10 0.70
 Aluminium Oxide  Al2O3 4.60 5.40 Free Lime Free CaO 0.70 1.40
Ferric Oxide   Fe2O3 3.50 4.00 Lime Saturation Factor LSF 0.92 0.97
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 1.50
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 9.00
 Loss on Ignition L.O.I 0.60 0.100 Tetracalcium Alumino Ferrite C4AF 10.00 12.00

 

physical composition
MIN MAX
Fineness Blaine test (cm2/g) 3000 3300
Expansion Autoclave (%) 0.05 0.16
Setting time: Initial (minute) 120 160
Final (minute) 170 310
Compressive Strenght: After 2 days (kg/cm2) 200 250
After 3 days (kg/cm2) 250 300
After 7 days (kg/cm2) 300 350
After 28 days (kg/cm2) 425 500

 

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
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