C4AF (Tetracalcium aluminoferrite)

C4AF, or Tetracalcium aluminoferrite, is a mineral compound found in Portland cement. It consists of calcium, aluminum, and iron arranged in a specific crystalline structure. C4AF contributes to the cement's strength and durability by reacting with water during setting and hardening, helping to develop the material's solid properties. It also influences the cement's color, often giving it a grayish hue. While it is a key component, it makes up a smaller portion of the cement mix compared to other compounds like calcium silicates. Overall, C4AF plays an important role in the physical and aesthetic qualities of cement.