In this study, the self-healing behavior of engineered cemetitious composites (ECC) containing different types and quantities of fly ash (FA) under colloidal nano silica (CNS) curing conditions was investigated through the examination of their different permeability properties. FA in two different characters, Class F and Class C, were used in the preparation of the mixtures in high volumes (FA/portland cement = 1.2 and 2.2). Self-healing capacities developed under CNS curing conditions were evaluated by changes in different permeability properties such as rapid chloride permeability test (RCPT) and electrical impedance measurement methods. In addition to these, the self-healing effects of the cracked composites were supported by microstructure analysis with the help of SEM–EDX and XRD tests on the sections taken from the crack interface of the sample. The results have showed that the CNS curing condition helps improve the permeability properties of composites by quickly and effectively covering their micro pores and cracks. In addition, the results of the experiment have revealed the effects of the use of different types and quantities of FA on the self-healing behavior of the ECC material. Finally, correlation analysis of ECC samples was applied according to the results obtained from EI and RCPT test methods and it was revealed that there was a negative significant relationship between test methods.

中文翻译：

---

胶体纳米二氧化硅固化条件下自愈胶凝复合材料不同渗透性能的研究

在这项研究中，通过检查其不同的渗透性能，研究了含有不同类型和数量的粉煤灰 (FA) 的工程水泥复合材料 (ECC) 在胶体纳米二氧化硅 (CNS) 固化条件下的自修复行为。具有两种不同特性的 FA，F 类和 C 类，用于制备大量混合物（FA/波特兰水泥 = 1.2 和 2.2）。在 CNS 固化条件下开发的自愈能力通过不同渗透性能的变化来评估，例如快速氯化物渗透测试 (RCPT) 和电阻抗测量方法。除了这些，借助 SEM-EDX 和 XRD 测试对样品裂纹界面的截面进行微观结构分析，支持了裂纹复合材料的自愈效果。结果表明，CNS固化条件通过快速有效地覆盖复合材料的微孔和裂缝，有助于提高复合材料的渗透性能。此外，实验结果揭示了使用不同种类和数量的FA对ECC材料自愈行为的影响。最后，根据EI和RCPT测试方法得到的结果，对ECC样本进行相关性分析，发现测试方法之间存在显着负相关关系。结果表明，CNS固化条件通过快速有效地覆盖复合材料的微孔和裂缝，有助于提高复合材料的渗透性能。此外，实验结果揭示了使用不同种类和数量的FA对ECC材料自愈行为的影响。最后，根据EI和RCPT测试方法得到的结果，对ECC样本进行相关性分析，发现测试方法之间存在显着负相关关系。结果表明，CNS固化条件通过快速有效地覆盖复合材料的微孔和裂缝，有助于提高复合材料的渗透性能。此外，实验结果揭示了使用不同种类和数量的FA对ECC材料自愈行为的影响。最后，根据EI和RCPT测试方法得到的结果，对ECC样本进行相关性分析，发现测试方法之间存在显着负相关关系。