According to the microstructure development of mortar, TSA includes the following four procedures: diffusion of ions, ettringite formation, gypsum formation and thaumasite formation.

• 从微观角度分析，将TSA侵蚀过程分为四个阶段：离子迁移期，钙矾石生成期，石膏生成期和碳硫硅酸钙生成期。