• Pozzolanic Activity: Metakaolin is known for its pozzolanic activity, which means it reacts with calcium hydroxide (lime) in the presence of water to form additional cementitious materials. This reaction contributes to improved strength and durability in concrete.
• Improved Concrete Properties: When metakaolin is added to concrete mixes, it can enhance various properties, including compressive strength, durability, workability, and resistance to chemical attack. It also reduces the permeability of concrete.
• Reduced Carbon Footprint: The production of metakaolin generally requires lower temperatures compared to the production of traditional cementitious materials, such as Portland cement. This results in a lower carbon footprint, making metakaolin a more environmentally friendly option in some applications.
• Applications in Concrete: Metakaolin is often used as a supplementary cementitious material in the production of high-performance and high-strength concrete. It is commonly used in combination with Portland cement to create blended cement mixtures.
• White Color: Metakaolin is typically white in color, which can be advantageous in applications where color control is important, such as in the production of white or colored concrete.
• Applications Beyond Concrete: While metakaolin is widely used in the concrete industry, it can also find applications in other areas, including ceramics, geopolymers, and as a filler in plastics and rubber.

It's important to note that the properties of metakaolin can vary depending on factors such as the source of the kaolin clay, the calcination process parameters, and the specific application requirements. Overall, metakaolin is valued for its ability to improve the performance of concrete while offering certain environmental benefits.