Which of the following can be used as a masonry unit?
- AStones
- BConcrete blocks
- CAutoclave cellular concrete blocks
- DAll of theseCorrect
Solution
Concept
Various materials like stones, dense concrete, and lightweight cellular concrete are standardized and widely used as masonry units in construction.
Step-by-step solution
1. Identify the definition of a masonry unit: a modular building block bound together with mortar. 2. Review the given options: Stones are traditional masonry units (Option A). 3. Concrete blocks are widely used modern masonry units (Option B). 4. Autoclaved cellular concrete (ACC) blocks are heavily used for lightweight and efficient masonry construction (Option C). 5. Conclude that all listed options are valid masonry units, making (D) the correct choice.
Explanation
Masonry units are building blocks used to construct structures like walls, piers, and columns. Commonly used masonry units include natural or artificial stones, conventional clay bricks, concrete blocks, and lightweight autoclaved cellular concrete (ACC) blocks.
Why the other options are wrong
A: Stones are traditional masonry units. B: Concrete blocks are standard precast masonry units. C: ACC blocks are modern lightweight masonry units.
Shortcut
Think about common construction materials used with mortar to form walls; stones, concrete blocks, and AAC blocks are all standard.
Common mistake
Thinking masonry units are only restricted to traditional burnt clay bricks.
Correct answer: D) All of these