Pozzolanic activity

The pozzolanic activity is a measure for the degree of reaction over time or the reaction rate between a pozzolan and Ca²⁺ or calcium hydroxide (Ca(OH)₂) in the presence of water. The rate of the pozzolanic reaction is dependent on the intrinsic characteristics of the pozzolan such as the specific surface area, the chemical composition and the active phase content.

Physical surface adsorption is not considered as being part of the pozzolanic activity, because no irreversible molecular bonds are formed in the process.^[1]

^ Takemoto, K.; Uchikawa H. (1980). "Hydration of pozzolanic cements". Proceedings of the 7th International Congress on the Chemistry of Cement. IV-2: 1–29.

[Takemoto1980-1] Takemoto, K.; Uchikawa H. (1980). "Hydration of pozzolanic cements". Proceedings of the 7th International Congress on the Chemistry of Cement. IV-2: 1–29.

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