Morphology and microstructure of hydrating portland cement and its constituents III. Changes in the hydration of a mixture of C3S,C3A and gypsum with and without triethanolamine and calcium lignosulphonate present

Systematic sequential observations with the electron microscope were made of the morphological changes which occurred during the hydration of a paste mixture of C₃S, C₃A and gypsum. It was found that this system produced hydration products similar in nature to those produced by the monomineral systems with gypsum present. The two organic admixtures studied had some effect on changes in morphology and microstructure of the hydrating mixture, but they showed a pronounced influence on the rate of the hydration processes.