Abstract The hydration model of Parrot & Killoh (1984) has been extended to blended cements and coupled to a micromechanical scheme similar to that of Pichler & Hellmich (2011) to estimate the Young modulus and the compressive strength of cementitious materials as a function of time. A finite aspect ratio of 7 is introduced to describe the shape of the hydrates and improve the estimate of the early age strength by the micromechanical scheme. Furthermore, accounting for the stress fluctuations in the cement paste partly explains the fact that the compressive strength of a concrete can be lower than that of its cement paste. Finally, the estimated physical properties are compared to numerous experimental measurements from the literature and new experimental measurements on blended cement pastes featuring significant weight fractions of limestone filler, fly ash or silica fume. It is shown that the present model slightly overestimates the dilution effect.

中文翻译：

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估计水化混合胶凝材料的力学性能：基于微观力学的研究

摘要 Parrot & Killoh (1984) 的水化模型已扩展到混合水泥，并耦合到类似于 Pichler & Hellmich (2011) 的微机械方案，以估计作为时间函数的胶凝材料的杨氏模量和抗压强度. 引入有限纵横比 7 来描述水合物的形状，并通过微机械方案改进早期强度的估计。此外，考虑到水泥浆中的应力波动，部分解释了混凝土的抗压强度可能低于其水泥浆的事实。最后，将估计的物理特性与文献中的大量实验测量值和对混合水泥浆的新实验测量值进行比较，该混合水泥浆具有显着重量分数的石灰石填料、粉煤灰或硅粉。结果表明，本模型略微高估了稀释效应。