The bond-enhancing mechanisms of nano-silica (NS) deposition, described solely by a pozzolanic reaction, have often overlooked its underlying physicochemical nature. We propose a novel framework to quantify spatial disorder in NS deposition and to analyze its impact on the interfacial bond properties of carbon textiles in cement composite. The framework leverages domain knowledge (the morphological characteristics and topochemical hydration mechanisms of cement and NS particles) to estimate the degree of cohesive interconnection between the primary and secondary calcium silicate hydrate (C–S–H) phases precipitated in the textile/matrix interfacial transition zone (ITZ). Utilizing image analysis and rigorous statistical approaches, this framework quantifies latent spatial features derived from the size, polydispersity, and spatial heterogeneity of deposited NS particles. Results confirm that the textile/matrix interfacial bond is a macroscopic property governed not merely by the quantity of NS deposition but also by its topographical complexity, with scale dependence linked to the cement particle size distribution. Strong linear relationships in the inter-scale correlations (R² > 0.90) demonstrate the consistency of our framework, significantly outperforming other quantitative methods.

中文翻译：

---

碳纺织品/水泥复合界面键的纳米二氧化硅沉积洞察：空间特征的量化


纳米二氧化硅 （NS） 沉积的键增强机制，仅由火山灰反应描述，往往被忽视了其潜在的物理化学性质。我们提出了一种新的框架来量化 NS 沉积中的空间无序，并分析其对水泥复合材料中碳纺织品界面键特性的影响。该框架利用领域知识（水泥和 NS 颗粒的形态特征和拓扑化学水化机制）来估计在纺织品/基质界面过渡区 （ITZ） 中沉淀的初级和次级硅酸钙水合物 （C-S-H） 相之间的内聚互连程度。该框架利用图像分析和严格的统计方法，量化了从沉积的 NS 颗粒的大小、多分散性和空间异质性得出的潜在空间特征。结果证实，纺织品/基体界面键是一种宏观特性，不仅受 NS 沉积量的控制，还受其地形复杂性的控制，其尺度依赖性与水泥粒度分布有关。尺度间相关性中的强线性关系 （R² > 0.90） 证明了我们框架的一致性，明显优于其他定量方法。