The randomness of void shape and enrichment of calcium hydroxide are significant in interfacial transition zone (ITZ) of concrete; however, current theoretical models of ITZ do not include these features. In this article, ITZ was regarded as a three-phase composite material, and the pore morphological parameters were defined according to the characteristics of microscopic pores, and the corresponding random distribution function was constructed. The calcium hydroxide enrichment factor was introduced, and a cross-scale ITZ Young’s modulus calculation model was established in combination with the Mori–Tanaka method. The reliability of the proposed model in this paper was verified through comparison to experimental results in a reference.

中文翻译：

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基于空洞形状随机性和氢氧化钙富集的ITZ跨尺度杨氏模量计算模型

在混凝土的界面过渡区（ITZ）中，空隙形状的随机性和氢氧化钙的富集是很重要的。但是，当前的ITZ理论模型不包括这些功能。本文将ITZ视为一种三相复合材料，并根据微观孔隙的特征定义了孔隙形态参数，并构建了相应的随机分布函数。引入了氢氧化钙富集因子，并结合Mori–Tanaka方法建立了跨尺度ITZ杨氏模量计算模型。通过与参考中的实验结果进行比较，验证了本文提出的模型的可靠性。