When mixed with water the resulting cement slurry is basic

Question

The composition of "ordinary" Portland cement is approximately 20,56% SiO₂, 63.82% CaO,

2.99% Fe₂O₃, 0.76% K₂O, 5.50 % Al₂O₃, 0.32%Na₂O,

0.95 % other and 0.52% in soluble. Identify three bases of Portland cement and the compounds they form when mixed with water when mixed with water the resulting cement slurry is basic.