Cement

Question 1

What is cement made of?

Answer 1

limestone and clay

Question 2

Formula for alite

Answer 2

3CaO*SiO2, aka C3S

Question 3

Formula for belite

Answer 3

2CaO*SiO2, aka C2S

Question 4

Tricalcium aluminate formula

Answer 4

3CaO*Al2O3, aka C3A

Question 5

What also may be present in the clinker microstructure?

Answer 5

If an Fe2O3 impurity is present, 4CaOAl2O3Fe2O3 can be present as well, aka C4AF

Question 6

What is the typical composition of Portland cement?

Answer 6

> 55% Ca3SiO5
20% Ca2SiO4
10% Ca3Al2O6
8% Ca4Al2Fe2O10
5% CaSO4*2H2O (from gypsum)

Question 7

Where does the name for Portland cement come from?

Answer 7

developed in england in 1756, name derived from similarity to Portland stone quarried in Dorset, England