Abstract Predicting the evolution of stiffness in cement paste requires linking morphological properties of the microstructure to the evolution of mechanical properties. Measures are typically difficult to obtain with sufficient time resolution to capture the transitions as the morphology evolves. In this work, we show the combined result 1H NMR and EMM-ARM, a real-time measure of the modulus, with hydration and finite element modelling. Together, these reveal the different mechanisms through which the cementitious matrix gains stiffness, and further hints at links to the morphology of hydrates. A quantitative measure of the roles of percolation, hydrate growth, and space filling is thus provided. A practical outcome of this research is an empirical law linking the stiffness of C-S-H foam to its porosity from the start of the hydration.

中文翻译：

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水化水泥浆体弹性模量演化的微观结构模拟与测量

摘要 预测水泥浆刚度的演变需要将微观结构的形态特性与机械性能的演变联系起来。随着形态的演变，通常很难以足够的时间分辨率获得测量值来捕捉转变。在这项工作中，我们展示了 1H NMR 和 EMM-ARM 的组合结果，这是模量的实时测量，具有水合作用和有限元建模。总之，这些揭示了水泥基体获得刚度的不同机制，并进一步暗示了与水合物形态的联系。因此提供了对渗流、水合物生长和空间填充作用的定量测量。这项研究的一个实际结果是一个经验法则，将 CSH 泡沫的刚度与其从水合开始时的孔隙率联系起来。