Article | REF: IN237 V1

Characterization of cement-based materials by infrared spectroscopy

Author: Matthieu HORGNIES

Publication date: July 10, 2020

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5. Glossary

Carbonation; Carbonation

Over time, the hydrates formed from the reaction of cement and water, in particular portlandite crystals (Ca(OH) 2 ), naturally carbonate on contact with atmospheric carbon dioxide dissolved in capillary water according to the carbonation reaction: Ca(OH) 2 + CO 2 ⇒ CaCO 3 + H 2 O.

Under ambient conditions of temperature and relative humidity, carbonation is governed by the transport of atmospheric CO 2 within capillary water. It begins at the extreme surface of the concrete and progresses towards the core of the material. Note that hydrated calcium...

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