Abstract Wedge split test specimens were conditioned to a relative humidity of 50%, deformed to various damage states, and exposed to liquid water. Water ingress was monitored using x-ray attenuation measurements and compared to numerical predictions. The transport model accounts for the damage state using the cracked hinge model and a simplified approach whereby a crack is considered to consist of two distinct parts: 1) a coalesced crack behaving as a free surface for moisture ingress, and 2) an area of isolated micro cracks behaving as bulk material. Comparison of experimental and model results shows the simplified crack geometry approach applied in the transport model is capable of predicting the ingress of moisture and influence of cracks. The model was found to underestimate the vertical extent of moisture ingress in the largest CMOD samples (0.20 and 0.40 mm), which was likely due to instability of the large cracks in these samples.

中文翻译：

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开裂胶凝材料中的水分进入

摘要 楔形劈裂试样在相对湿度50%的条件下，变形为各种损伤状态，并暴露于液态水中。使用 X 射线衰减测量监测进水情况，并与数值预测进行比较。传输模型使用裂纹铰链模型和一种简化方法来解释损坏状态，其中裂纹被认为由两个不同的部分组成：1）作为水分进入的自由表面的聚结裂纹，以及 2）孤立的区域表现为块状材料的微裂纹。实验和模型结果的比较表明，在传输模型中应用的简化裂纹几何方法能够预测水分的进入和裂纹的影响。