Study Notes on Construction Materials - Stones

Types of Stone

• Stones classified by origin: igneous, sedimentary, metamorphic.

Igneous Rocks

• Formation: Solidified from magma, can be divided into:

  • Intrusive: Cool slowly inside Earth (e.g., granite, diorite).

  • Extrusive: Cool quickly on the surface (e.g., basalt, pumice).

Key Characteristics

• Granite: Hard, resistant, available in various colors; low porosity. Used in countertops, floors.

• Basalt: Extremely hard, low porosity, heat-resistant; often used in flooring and wall cladding.

Sedimentary Rocks

• Formed from consolidated sediments through processes like compaction and cementation. Includes:

  • Limestone: Soft, porous, susceptible to stains; used in flooring and bathrooms.

  • Sandstone: Has a natural look, moderate durability; suited for flooring and garden paving.

  • Travertine: Distinctive fibrous texture, highly porous; common in flooring and countertops.

Metamorphic Rocks

• Formed under pressure and heat, altering existing rock types.

  • Marble: Dense, beautiful veining; used in high-end applications like countertops.

  • Slate: Durable with low porosity; used for flooring, roofing.

Stone Production Processes

• Extraction: Mining of stone materials.

• Cutting: Various techniques including sawing and natural cleaving.

Finishing Techniques

• Includes natural cutting, polished finishes, brushed finishes, and aged finishes for aesthetics and functionality.