Pozzolan is a natural black volcanic substance that is light in weight as a result of its volatility and the entry of volcanic gases and vapors through it at the moment of its exit. It is in the form of pebbles with a size of 1 to 3 cm. It is an economical material used in the cement industry, as it is added to the cement components (limestone and clay) during manufacturing to give A type of cement known as pozzolanic Portland cement, which is the most resistant to moisture and some natural environmental factors.