Mercedes Perez Mendez - Study of stabilized phases in high alumina cement mortars. Part I. Hydration at elevated temperatures followed by carbonation

Document created by Mercedes Perez Mendez on Apr 8, 2016
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      Cement. and Concrete Research, 13,759-770  (1983). 


    The use of temperatures higher than 30°C during the hydration of   1:3 high alumina cement mortar leads to the formation of the   cubic hydrate C3AH6, hence avoiding the conversion of CAH10 to   C3AH6. The subsequent carbonation of C3AH6 with CO2 and thermal   treatment leads to the formation of stable carbonated phases. The   optimum hydration ages are the minimum necessary times to get   C3AH6: 3 hours at 80°C, 6 hours at 60°C. The product is in a   state we call “semiplastic” in which the next structural   transformation - carbonation - occurs more easily than when the   specimens have a rigid structure. The effect of a   super-water-reducing admixture has also been studied.

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