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Both fluorine‐acrylic (FA) emulsion and sulphoaluminate cement (CSA) have been proved as satisfactory marine engineering materials, and a better performance can be expected by their combined use. However, their compatibility has rarely been researched. In this study, the effects of sorbitol and its mechanism are investigated by the cement paste fluidity, rheological property,  tensile  strength,  water  absorption  and  scanning  electron  microscopy  (SEM)  tests.  The  results  showed  that, compared with sodium tripolyphosphate, borax and sodium gluconate, sorbitol can significantly improve the double electric layer of FA, and the absolute value of Zeta potential was  increased by 25% compared with the blank sample without any retarder  added.  With  the  increase  of  sorbitol  dosage,  the  fluidity,  rheological  behavior,  tensile  strength  and  water absorption sharply changed first and then tended to be stable after sorbitol dosage reached the optimal dosage of 0.25% for  the  compatibility  improvement.  The  morphology  analysis  also  proved  its  advantages,  but  the  more  significant improvement  can  be  ensured  by  a  larger  polymer  to  cement  ratio  (p/c)  value.  Finally,  the mechanism  hypothesis  is proposed. The film formation rate of the emulsion matches the hydration rate of the cement, due to sorbitol addition.

es materials and manufacturing

Investigation of Compatibility of Fluorine-Acrylic Emulsion and Sulphoaluminate Cement in the Design of Composite Coating: Effects of Sorbitol and Its Mechanism