Blast Furnace Cement: CEM III/A 32.5 N

 Description

Portland blast - furnace slag cement is a blend of Portland Cement and finely ground granulated blast - furnace slag in which the slag portion is between 35% and 64% of the mass of the total Portland Cement clinker and granulated blast - furnace slag in the cement mills.

 Standard Specification

It is produced according to the Egyptian standards ES 4756/1-2007 which complies with the European specifications EN 197/1-2000.

 Physical and Mechanical Properties

Cement Standard Specifications Limits
Property	Tourah Cement	Standard Specification Limits
Finenss (Blain)	4600 cm2/gm	-
Setting Time (Initial) min	166 Min	=60 Min
(Final)	-	-
Expansion	1mm	10 mm Max
Compressive Strength 7D	27.36 N/mm2	12.3 N/mm2 Min
Compressive Strength 28D	39.28 N/mm2	32.5 N/mm2 Min
Heat of Hydration 7D	50	60 cal/gm Max
Heat of Hydration 28D	60	70 cal/gm Max

 Chemical Properties

Cement Standard Specifications Limits
Analysis	Tourah Cement	Standard Specification Limits
Loss on lgnition	0.65 %	3.0 % Max
Insoluble Residue	0.5 %	1.5 % Max
Sulphate (SO3)	1.14 %	3.0 % Max
Chloride Content (Cl)	0.01%	0.1 % Max

 Practical Main Application

Applied in all construction works such as harbor quays & ports which are exposed to chemical effects and has a massive concrete construction. This type of cement is resistant for salts and has low heat of hydration during setting.

 Storing

• Cement bags should be stored in a dry place and kept away from a humid environment.
• Bags are stacked over wooden palettes.
• Cement bags should be covered in case of humid & rainy weathers.
• Don’t stuff more than 8 bags over each other.

 Validity

• 6 weeks from the packing date, provided that it’s properly stored as previously mentioned instructions.
• Cement should be re-tested before use after this period.