Enhancement of cement mortar hydration by carbonation activator induced by organic additives

This study developed an efficient in-situ carbonation activator with enhanced carbon capture, using organic additives in an aqueous solution.The fresh carbonated cement suspension was mixed with raw materials through secondary mixing to improve cement mortar hydration.Various organic additives were tested for their ability to leach calcium and aluminum ions, affecting carbonation efficiency and products.Characterization showed that these additives increased carbon capture and influenced calcium carbonate morphology.The activator, rich in silica gel and calcium carbonate polymorphs, acted as a filler and nucleating agent, accelerating hydration and promoting carboaluminate formation.This method reduced mortar porosity, improved pore structure, and enhanced mechanical strength while achieving effective carbon sequestration.