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![A review of mechanical properties and carbonation behavior evolution of lime mortar for architectural heritages restoration](https://image.oaes.cc/49b10e55-7556-4ac4-afe6-05cd66358bc2/mmm2026.fig.5.jpg)
Figure 5. Crystalline hierarchical structure process of CaCO3. (A) Supramolecular interaction between some functional groups of egg white and Ca2+; (B) Uniform ACC nanoparticles were formed at the initial stage of the reaction; (C) The aggregation of some nucleation and ordered structures under electrostatic interaction and van der Waals force; (D and E) ACC nuclei begin to aggregate and form mesoscale layered CaCO3 nanoparticle arrangement; (F) Nanoparticles are constructed, and hierarchical structures are formed by a self-assembly process; (G) The flake CaCO3 crystals aggregate and self-assemble to form a wool spherical upper structure with many fibers. ACC: Amorphous calcium carbonate.