Abstract Seawater sea-sand Engineered Cementitious Composites (SS-ECC) is a new version of ECC for marine constructions facing the scarcity of freshwater and river/manufactured sand. This study aims to assess and model the crack characteristics of SS-ECC, which are critical for its applications with non-corrosive reinforcements. The influence of sea-sand size, fiber length and fiber dosage on the crack characteristics of SS-ECC was explored. A five-dimensional representation was proposed to assess the overall performance of SS-ECC, by comprehensively considering both the crack characteristics (i.e., crack width and its variation) and the mechanical properties (i.e., compressive and tensile properties). A probabilistic model was also proposed to describe the stochastic nature and evolution of crack width, and it can be used to estimate the critical tensile strain on SS-ECC for a given crack-width limit and cumulative probability. The findings and proposed methods can facilitate the design of SS-ECC in marine and coastal structures.

中文翻译：

---

海水海砂工程/应变硬化水泥基复合材料 (ECC/SHCC)：裂纹特征的评估和建模

摘要 海水海砂工程胶凝复合材料（SS-ECC）是一种新版本的ECC，用于面临淡水和河流/人造砂稀缺的海洋建筑。本研究旨在评估和模拟 SS-ECC 的裂纹特征，这对其应用非腐蚀性增强材料至关重要。探讨了海砂粒径、纤维长度和纤维用量对SS-ECC裂纹特性的影响。通过综合考虑裂纹特征（即裂纹宽度及其变化）和机械性能（即压缩和拉伸性能），提出了五维表示法来评估 SS-ECC 的整体性能。还提出了一个概率模型来描述裂纹宽度的随机性质和演变，它可用于估计给定裂纹宽度限制和累积概率的 SS-ECC 上的临界拉伸应变。研究结果和提出的方法可以促进海洋和沿海结构中 SS-ECC 的设计。