Heavy Weight Aggregate in High-Density Concrete Key Points: Purpose: Heavyweight aggregates are used to produce high-density concrete, which has applications requiring superior strength and radiation shielding. Common Types of Heavyweight Aggregates:

High Density Concrete Definition: High Density Concrete is a type of concrete with a density significantly higher than that of conventional concrete. Key Characteristics: Typically has a density ranging from 3,000 to 4,000 kg/m³. Conventional concrete density is around 2,400 kg/m³.

Applications of Fibre Reinforced Concrete (FRC) 1. Pavements and Overlays Enhanced durability and resistance to cracking. Used in airport runways, highways, and industrial floors. Reduction in maintenance and repair cost.

Types of Fiber Used in Fiber Reinforced Concrete Steel Fiber Improves tensile strength. Enhances durability. Offers better resistance to cracking and spalling. Commonly used in applications like industrial floors and pavements.

Factors Affecting Properties of Fibre Reinforced Concrete Type of Fibers: Steel Fibers: Enhance tensile strength, impact resistance, and fatigue performance. Glass Fibers: Improve flexibility and resistance to cracking, best for non-structural applications. Synthetic Fibers (e.g., polypropylene): Increase ductility and reduce plastic shrinkage. Natural Fibers: Offer good energy-absorbing capacity but may have variable properties. Fiber Characteristics:

Fibre Reinforced Concrete Definition: Fibre Reinforced Concrete (FRC) is a type of concrete that includes fibrous materials to enhance its structural integrity.

Types of Polymer Concrete Polymer Modified Concrete (PMC): Traditional Portland cement mixed with a polymer to form a composite binding material. Improves mechanical properties and durability. Polymer Resin Concrete (PRC):

Polymer Concrete Definition: Polymer Concrete: A type of concrete where the traditional cement binder is replaced with a polymer binder. Key Points:

Autoclaved Aerated Concrete (AAC) Definition: Autoclaved Aerated Concrete (AAC) is a lightweight, precast, foam concrete building material. Composition: It is produced by mixing silica-rich material (like sand or fly ash), cement, lime, water, and a small amount of aerating agent (aluminum powder).

Cellular Light-Weight Concrete (CLC) Definition: Cellular Light-Weight Concrete (CLC) is a type of lightweight concrete that is produced by mixing cement, fly ash, water, and pre-formed stable foam. The foam is produced with the help of a foam generator and is responsible for the light weight of the concrete.