Question
Which among the following are essential constituents of Portland cement?
NDA
General Ability
General Science
2024
NDA 2024 (Phase 1)
NDA General Ability Question (2024) — Solution
Options
- A. Sand, lime, clay
- B. Silica, alumina, lime
- C. Silica, lime, graphite powder
- D. Sand, graphene, clay
Answer
B. Silica, alumina, lime
Step-by-step solution
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.
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