Fly ash (FA) concrete has many advantages of enhancing durability even in severe environmental conditions. If the long-term performance can be predicted with higher reliability, it greatly contributes to determination of proper mix proportions in structural design, with further application to practical structures being anticipated. Although the finding that peculiar slow-down hydration of FA in blended cement occurs according to the experimental conditions had been pointed out, the original multicomponent hydration model in DuCOM was not able to simulate a similar tendency. Hence, by simply considering morphology and intrinsic properties of precipitated C-S-H gels due to pozzolanic reactions, an enhanced hydration model was proposed. In addition, the original models, regarding compressive strength development and continuous hydration considering spatial condensed water in fine micro-pore structures, were extended to be applicable also to FA blended cement. Verification of the installation effect was revealed through good agreement with the peculiar experimental tendency.

粉煤灰（FA）混凝土具有许多优点，即使在恶劣的环境条件下也能提高耐久性。如果可以以更高的可靠性预测长期性能，则将大大有助于确定结构设计中的适当配合比，并有望进一步应用于实际结构。尽管已经指出了根据实验条件在混合水泥中发生特殊的FA缓慢水化的发现，但DuCOM中原始的多组分水化模型无法模拟类似的趋势。因此，通过简单地考虑由于火山灰反应而沉淀的CSH凝胶的形态和内在性质，提出了增强的水合模型。此外，原始型号 考虑到细微孔结构中的空间凝结水的抗压强度发展和连续水化，已扩展到也适用于FA掺合水泥。通过与特殊的实验趋势的良好一致性揭示了安装效果的验证。