Describe the material concrete: how it is made, its properties, and why it is useful in construction.

I will choose Concrete as the material.

A. Choose ONE material (6 marks)
Material chosen: Concrete

1. How is it made?
Concrete is made by mixing cement, aggregates (sand and gravel), and water. The cement and water react chemically in a process called hydration, forming a paste that binds the aggregates together. This mixture is then poured into molds and allowed to harden over time.

2. What are its properties?

• High compressive strength: It can withstand significant pushing forces.
• Durability: It is long-lasting and resistant to weathering and abrasion.
• Fire resistance: It does not burn.
• Versatility: It can be molded into various shapes before it hardens.
• Low tensile strength: It is weak when pulled apart, which is why it's often reinforced with steel.

C. Explain why this material is useful:
Concrete is highly useful because of its exceptional compressive strength and durability, making it ideal for supporting heavy loads in construction. Its ability to be molded into any shape before hardening allows for diverse architectural designs. These properties make it a fundamental material for building foundations, bridges, roads, and dams, providing strong and long-lasting structures.