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Standards
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Egyptian Standards : (4756 - 2007/1) CEM I (42.5N)
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European Standards: (2004/1- EN197) CEM I (42.5N)
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Uses
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It is used in all reinforced concrete constructions such as reinforced buildings, water tanks, roads and bridges. It is also used for all construction works which are subject to high stresses but not exposed directly to sulfate salts.
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Physical and mechanical properties
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Egyptian Standards (4756-2007/1)
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Averages
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Property
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Setting time
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Not less than 60 minutes
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1.40 – 2.10
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Initial setting time (hr.m)
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2.30 – 3.00
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Final setting time (hr.m)
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Pressure resistance
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Not less than 10 N/mm2
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18 – 22 N/mm2
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Post 2 days
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Not less than 42.5 N/mm2
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44 – 46 N/mm2
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Post 28 days
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Size stability
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Not more than 10 mm
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1 - 2 mm
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(Le Châtelier's principle)
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Chemical properties (%)
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Not more than 5.00
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2.2 – 2.6
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Weight loss on burning
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Not more than 3.50
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2.5 -3.2
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Tri Sulfur Oxide
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Not more than 5.00
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0.9 – 1.5
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Non-soluble material
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Not more than 5.00
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2.3 -2.6
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Magnesium Oxide
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Not more than 0.60
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0.4 – 0.55
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Alkalis contents
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Not more than 0.10
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0.04 – 0.08
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Chloride content
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