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
Setting time:	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

Portland cement type 1

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