Natural Pozzolan

Chemical Properties:

Silica as Sio2        ****- *4.*3 %
Alumina as Al2o3 ****- *8.*2 % 
Iron as Fe2o3        ****- 5.*3 %
Loss on ignition    ****- 5.*2 %
 

Natural pozzolan is Earths own cement since its already been burnt at high temperatures. 
It's a siliceous or siliceous and aluminous material which reacts with calcium hydroxide in the presence of water at room temperature (cf. pozzolanic reaction). In this reaction insoluble calcium silicate hydrate and calcium aluminates hydrate compounds are formed possessing cementitious properties. 

Application & Uses:

- Natural pozzolan is used for production of Pozzolan Portland Cement.

- It is used in concrete & concrete products with lime, resulting an improved final product with much lower cost.

- It can used in several types of adhesives and bonds.

Advantanges:

- Enhances Compressive Strength of concrete.

- Resists Chloride Attack.

- Resists Sulfate Attack.

- Mitigates Alkali Silica Reaction.

- Protects Steel Reinforcement from Corrosion.

- Increases Abrasion Resistance.

- Reduces Heat of Hydration.

- Improves Durability.