CEMENT PRODUCT CEM I ( 42.5R) CEM I ( 42.5R)

 

Standards

Egyptian Standards  : (4756   -  2007/1)          CEM I (42.5R)

European Standards: (2004/1- EN197)          CEM I (42.5R)

Uses

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.

Physical and mechanical properties

Egyptian Standards (4756-2007/1)

Averages

Property

 

 

Setting time 

Not less than 60 minutes

1.40 – 2.10

Initial setting time (hr.m)

 

2.30 – 3.00

Final setting time (hr.m)

 

 

Pressure resistance

Not less than  10  N/mm2

22 – 24  N/mm2

Post 2 days

Not less than  42.5  N/mm2

44 – 46  N/mm2

Post 28 days

 

 

Size stability 

Not more than 10 mm

1 -  2  mm

(Le Châtelier's principle)

Chemical properties (%)

Not more than  5.00

2.2 – 2.6

Weight loss on burning

Not more than  3.50

2.5 -3.2

Tri Sulfur Oxide

Not more than  5.00

0.9 – 1.5

Non-soluble material

Not more than  5.00

2.3 -2.6

Magnesium Oxide

Not more than  0.60

0.4 – 0.55

Alkalis contents

Not more than  0.10

0.04 – 0.08

Chloride content

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