Minerals (Bentonite)

Definition

Clay formed by volcanic ash that can absorb water and swell.

Purpose

Bentonite is used for its absorbent and swelling properties, making it useful in various industrial applications such as drilling mud, sealing ponds, and as a binder in foundry sands. It is also used in construction for waterproofing and soil stabilization.

Examples of Use

• Drilling mud: Using bentonite to cool and lubricate drill bits and to remove cuttings from boreholes.
• Waterproofing: Applying bentonite in construction to create barriers that prevent water infiltration.
• Pond sealing: Using bentonite to seal ponds, lagoons, and landfills to prevent water leakage.

Related Terms

• Clay: A natural, fine-grained material that can absorb water and is used in ceramics, construction, and industrial applications.
• Sealant: A material used to block the passage of fluids through surfaces or joints.
• Soil Stabilization: Techniques used to improve the physical properties of soil, often using additives like bentonite.

Notes

• Bentonite expands significantly when wet, creating a dense, impermeable barrier.
• It is available in various forms, including granular, powder, and slurry, depending on the application.
• Proper handling and application are crucial to achieving the desired results in different uses of bentonite.