A particular brand of Portland cement is made using limestone, kaolinite and sand. The three raw materials are pre-calcined at 950°C, which drives off any carbon dioxide and water chemically associated with the minerals. The bulk oxide composition of the calcined materials is as follows: a) Assuming that the free-lime content of the clinker is zero, and bearing in mind that gypsum has not yet been added, what proportions of the four main cement compounds are potentially present?
A particular brand of Portland cement is made using limestone, kaolinite and sand. The
three raw materials are pre-calcined at 950°C, which drives off any carbon dioxide and
water chemically associated with the minerals. The bulk oxide composition of the
calcined materials is as follows:
a) Assuming that the free-lime content of the clinker is zero, and bearing in mind
that gypsum has not yet been added, what proportions of the four main cement
compounds are potentially present?
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c) If the cement manufacturer wanted to produce a white Portland cement, what
changes would be made in terms of sourcing raw materials?
The molecular weight weights of the oxide components of Portland cement are:
CaO = 56; SiO2 = 60; Al2O3 = 102; Fe2O3 = 160
by Bartleby Expertb) How much sand is used as a percentage of the total mass calcined raw materials?
by Bartleby Expert
