The phenomenon of leaching consists in the dissolution of solid calcium in cement hydrates when concrete is exposed to any aggressive solution. Calcium leaching is completely controlled by the thermodynamic equilibrium between cement hydrates and the porous solution. Thus, it might be described by considering the hydrates (C-S-H and aluminates) solubility evolution with pH. Nevertheless a simplifed model has been proposed considering only the different calcium phases of the hydrates. This study suggested definition of calcium leaching density with type of cement hydrate.

• 윤인석(인덕대학교 건설정보과) | Yoon, In-Seok