Flashcards on Introduction to Concrete and Reinforced Concrete
Introduction to Concrete & Reinforced Concrete for Students
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Concrete and Reinforced Concrete
11 cards
Card 1
Question: What is concrete made from?
Answer: Cement, water, sand, and gravel (aggregate).
Card 2
Question: What is the initial state of concrete and what happens over time?
Answer: Initially soft and shapeable; over time it hardens and becomes very strong.
Card 3
Question: Name three general properties of concrete.
Answer: High compressive strength, durable (resistant to weather, fire, and water), and versatile (usable in many shapes and structures).
Card 4
Question: What is the main disadvantage of concrete's mechanical properties?
Answer: Low tensile strength — it is weak when stretched or bent.
Card 5
Question: List common uses of plain concrete.
Answer: Foundations, walls, floors, bridges, roads, and dams.
Card 6
Question: What is reinforced concrete?
Answer: Concrete that contains steel reinforcement (rebar) — steel bars or mesh placed inside the concrete.
Card 7
Question: Why is steel added to concrete (why reinforcement is needed)?
Answer: Concrete is strong in compression but weak in tension; steel is strong in tension, so together they form a strong, stable material.
Card 8
Question: Give four advantages of reinforced concrete.
Answer: Very strong and stable, long lifespan, resistant to fire and weather, and suitable for large and complex structures.
Card 9
Question: What are some disadvantages of reinforced concrete?
Answer: Heavy material, needs time to harden, requires formwork (moulds), and steel can corrode if not protected.
Card 10
Question: What are typical structural uses of reinforced concrete?
Answer: Beams and columns, ceilings (slabs), bridges, high-rise buildings, and foundations.