Construction Materials SEM 1

Natural Building Materials

Materials sourced from nature, such as stone, timber, sand, and clay, used for construction.

Artificial Building Materials

Manufactured materials, including brick, cement, concrete, steel, and glass, used in construction.

Pros of Natural Materials

Environment-friendly and traditional, but often have limited strength and require more maintenance.

Pros of Artificial Materials

High strength and uniform quality, though they can be more expensive to produce.

Key Properties of Good Building Materials

Must possess high strength, durability, fire and water resistance, economy, workability, and low maintenance.

Igneous Stones

Includes granite and basalt, used commonly for foundations, bridges, and roads.

Sedimentary Stones

Includes sandstone and limestone, favored for walls and cladding.

Metamorphic Stones

Includes marble and slate, used primarily for flooring and decorative purposes.

Brick Preparation Steps

Unsoiling, digging, cleaning, weathering, blending, tempering, moulding, drying, and burning.

Lime Manufacturing Process

Calcium carbonate (CaCO₃) is heated to produce quicklime (CaO), which then reacts with water to form slaked lime (Ca(OH)₂).

Types of Warping in Timber

Bowing, cupping, twisting, and crooking.

Seasoning of Timber

The process of removing moisture to enhance strength and prevent decay, cracking, and insect attack.

Types of Masonry Bonds

English (strongest, alternating header and stretcher) and Flemish (attractive, alternating header and stretcher in one course).

Load-bearing Walls

Thick walls that support the structure of a building.

Non-load Bearing Walls

Thin walls that serve to divide space without supporting any structure.

Components of Doors

Frame (fixed part) and shutter (movable part), designed for entry/exit and security.

Components of Windows

Includes casement, sliding, fixed, and louvered types, allowing light and ventilation.