Composite Materials
Composite materials are made from two or more constituent materials with significantly different physical or chemical properties. These materials work together to create a material with characteristics different from the individual components.

Examples of Composite Materials
1. Carbon Fiber Reinforced Polymer (CFRP) - used in aerospace and automotive industries for its high strength and lightweight properties.
2. Fiberglass - used in boat hulls and surfboards for its durability and corrosion resistance.
3. Concrete - a composite material made of cement, aggregates, and water, used in construction for its strength and versatility.
4. Plywood - made by layering thin sheets of wood together with adhesive, providing a strong and stable material for construction and furniture.

Classes of Construction Materials
Construction materials can be broadly categorized into three classes based on their composition and properties:

Natural Materials
- Examples include wood, stone, clay, and straw.
- These materials are extracted from nature and have been used in construction for centuries.
- They offer benefits such as sustainability, thermal insulation, and aesthetic appeal.

Synthetic Materials
- Examples include plastics, metals, and composites.
- These materials are manufactured through chemical processes and have specific properties tailored for construction purposes.
- They offer benefits such as durability, strength, and versatility in design.

Engineered Materials
- Examples include concrete, steel, and glass.
- These materials are designed and optimized for specific construction applications.
- They offer benefits such as high strength-to-weight ratio, fire resistance, and cost-effectiveness.
Overall, the choice of construction materials depends on factors such as project requirements, budget constraints, and environmental considerations. By understanding the different classes of materials and their properties, construction professionals can make informed decisions to ensure the success of their projects.