Pozzolans in Stronger Concrete Mixes

Pozzolans are siliceous or aluminous materials used with Portland cement to improve concrete performance. They react with the calcium hydroxide formed during cement hydration. This reaction helps increase strength and durability.

The usefulness of a pozzolan is measured by its pozzolanic activity...

Portland cement is sometimes interground or blended with pozzolans, which are siliceous and aluminous materials.

The finely divided pozzolans, in the presence of moisture, react with the calcium hydroxide released during cement hydration to produce cementitious compounds.

Pozzolans are naturally available, such as volcanic ash and ...