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In continuation of earlier work on early hydration, this study evaluates the late hydration of CAC and CaCO 3 using QXRD and thermodynamic modelling at different temperatures. Experiments were performed at 5, 23, 40 and 60 °C for up to one year. As stated in the preceding study, C 2 AH X might act as a precursor for monocarbonate in early hydration, and thus no or only little monocarbonate should form at temperatures below 20 °C. At 5 °C, monocarbonate starts precipitating after 7 d and remainsdoi:10.1016/j.cement.2021.100011 fatcat:kaivm6jyxnairnodeoglli5fw4