The influence of hydration on water transport within cement paste is usually neglected, especially for the simulation. However, in low water-to-cement ratio cement paste cured underwater, hydration with the affected microstructure occurs along with the water transport and should be taken into account. In this study, the water absorption and hydration degree were monitored in cement pastes with ultra-low w/c cured under water for 360 days. The modified Krstulovic-Dabic model was established to simulate the hydration process of cement paste having low w/c cured in lime-saturated water considering the effect of water absorption and incomplete cement hydration. By calculating the saturation degree, porosity, and diffusion coefficient, the water transport process considering hydration was simulated. The simulation results were verified by the average saturation degree and 1H nuclear magnetic resonance relaxometry with water gradient quantification. The results show that the water content discrepancy between the surface and center of the specimen increased with decreasing w/c. Reasonable agreements between the experimental results and the simulated results can be observed in cement pastes having different w/c.

中文翻译：

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考虑水化过程的水泥浆中长期水分输送的模拟


水化对水泥浆内水输运的影响通常被忽略，尤其是在模拟中。然而，在水下固化的低水灰比水泥浆中，受影响的微观结构的水化会随着水的运输而发生，因此应予以考虑。本研究以超低 w/c 水泥浆体为研究对象，在水下养护 360 d 的水泥浆体的吸水率和水化程度。建立改进的 Krstulovic-Dabic 模型，以模拟低 w/c 水泥浆体在石灰饱和水中固化的水化过程，同时考虑吸水和不完全水泥水化的影响。通过计算饱和度、孔隙率和扩散系数，模拟了考虑水化的水输运过程。通过平均饱和度和 1H 核磁共振弛豫法和水梯度量化验证了仿真结果。结果表明：试样表面与中心含水率的差异随w/c的减小而增大。在具有不同 w/c 的水泥浆中可以观察到实验结果与模拟结果之间的合理一致性。