Advances in understanding the effect of alkanolamine in cement-based materials

Recent research on the influence of four types of alkanolamines on the hydration of cementitious systems is summarized. In OPC, alkanolamines primarily affect aluminate hydration, as demonstrated by the chelation effects of various metal ions on alite hydration. The dosage and stability constants of chelation play important roles in this process. The effect of alkanolamines in blended cement was reviewed, and the enhancement was attributed to the directly enhanced dissolution of supplementary cementitious materials and enhanced pozzolanic reaction. The effects of alkanolamines can be further improved by interactions with other admixtures with appropriate mix designs in various cementitious systems. •The impacts of alkanolamines on cement properties and hydration are reviewed.•Alkanolamines modify cement hydration through impacts on aluminate hydration.•Optimizing effects in cement with synergistic admixture interactions are reviewed.•Future prospects in comprehending alkanolamine mechanisms are discussed.