It is well known that polymers can improve the toughness, bond strength, impermeability, frost resistance, and many physical properties of the cement-based materials. Besides, SAE dispersion retards and inhibits the formation of CH and C-S-H and also changes their morphology. AFt generation during the early hydration period is controlled gradually by the reaction of C 4AH 13 generation with increasing SAE dispersion, but this is controlled by the reaction of C 4AH 13 consumption for the control paste. SAE dispersion inhibits the formation of C 4AH 13 and thus AFt, and more SAE dispersion brings stronger influence, but it enhances the stability of AFt. The hydration heat and hydration degree of cement in the presence of SAE dispersion are less than those of the control. The results show that SAE dispersion prolongs the induction period, postpones and shortens the accelerating period, and inhibits the decelerating and stable periods of cement hydration. Early hydration of cement in the presence of styrene-acrylic ester (SAE) dispersion was investigated, and the hydration heat, hydration degree, and hydrates were analyzed using isothermal calorimeter, XRD, and ESEM.
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