Which among the following are essential constituents of Portland...

Portland cement, which is the most common type of cement used in construction, is composed primarily of the following essential constituents: - Silica (Silicon dioxide): Provides strength to the cement and contributes to its early strength development. - Alumina (Aluminium oxide): Helps in quick setting and hardening of cement. - Lime (Calcium oxide or calcium hydroxide): Acts as a binding material and contributes to the strength and durability of the cement.