نام فایل : مقاله در مورد سیمان پرتلند

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مقاله در مورد سیمان پرتلند :
Portland cement
 
Sampling fast set concrete made from Portland cement
Portland cement is the most common type of
cement
in general usage in many parts of the world, as it is a basic ingredient of
concrete
,
mortar
,
stucco
and most non-specialty
grout
. It is a fine powder produced by grinding Portland cement
clinker
(more than 90%), a maximum of about 5%
gypsum
which controls the set time, and up to 5% minor constituents (as allowed by various standards). As defined by the
European Standard
EN197.1, "Portland cement clinker is a
hydraulic
material which shall consist of at least two-thirds by mass of
calcium silicates

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