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A platform for research: civil engineering, architecture and urbanism
Why alite stops hydrating below 80% relative humidity
Abstract It has been observed that the hydration of cement paste stops when the relative humidity drops below about 80%. A thermodynamic analysis shows that the capillary pressure exerted at that RH shifts the solubility of tricalcium silicate, so that it is in equilibrium with water. This is a reflection of the chemical shrinkage in this system: according to Le Chatelier's principle, since the volume of the products is less than that of the reactants, a negative (capillary) pressure opposes the reaction.
Why alite stops hydrating below 80% relative humidity
Abstract It has been observed that the hydration of cement paste stops when the relative humidity drops below about 80%. A thermodynamic analysis shows that the capillary pressure exerted at that RH shifts the solubility of tricalcium silicate, so that it is in equilibrium with water. This is a reflection of the chemical shrinkage in this system: according to Le Chatelier's principle, since the volume of the products is less than that of the reactants, a negative (capillary) pressure opposes the reaction.
Why alite stops hydrating below 80% relative humidity
Flatt, Robert J. (author) / Scherer, George W. (author) / Bullard, Jeffrey W. (author)
Cement and Concrete Research ; 41 ; 987-992
2011-06-06
6 pages
Article (Journal)
Electronic Resource
English
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