For the SAOS measurements, 10.0 g of the C 3 A MS was weighed into a plastic cup, and DI water or the salt solutions were added according to the dosages described before. The mixture was stirred for 1 min at 600 rpm by a mechanical stirrer equipped with a propeller paddle. An appropriate amount of the pastes was immediately placed on the serrated bottom plate. The measurements started at 2 min 30 s after the addition of solutions and were carried out continuously for 3 h.