In this study, the self-healing of cracks in four repair systems mixed by aerobic-anaerobic bacteria and fiber is studied. The results showed that specimens S-1, S-3, and S-4 demonstrate remarkable efficacy in achieving complete repair for the majority of cracks with widths of 0.6 mm or less within a healing period of 28 d. Conversely, cracks exceeding 0.45 mm in width in specimen S-2 present challenges in achieving complete restoration. The Water permeability experiments showed that the crack repair effect of the four groups of specimens was in the following order: S-4 > S-3 > S-1 > S-2. Notably, cracks with initial widths <0.4 mm exhibit a commendable secondary repair rate of approximately 90 %. Further analysis underscores the fiber-reinforced binary microbial mineralization repair system (S-4) as yielding optimal repair outcomes, significantly enhancing water seepage resistance post-repair. This comprehensive investigation underscores the potential of our proposed repair systems to effectively crack-healing.

中文翻译：

---

好氧-厌氧细菌和纤维增强混凝土裂缝修复能力


本研究研究了好氧-厌氧细菌和纤维混合的四种修复系统中裂缝的自修复作用。结果表明，试件 S-1、S-3 和 S-4 在 28 d 的愈合期内对大多数宽度为 0.6 毫米或更小的裂缝实现了完全修复，效果显着。相反，样本 S-2 中宽度超过 0.45 毫米的裂纹对实现完全修复提出了挑战。透水实验表明，四组试件的裂缝修复效果依次为：S-4>S-3>S-1>S-2。值得注意的是，初始宽度 <0.4 毫米的裂缝表现出值得称赞的约 90% 的二次修复率。进一步分析强调纤维增强二元微生物矿化修复系统（S-4）可产生最佳修复结果，显着增强修复后的防渗水性能。这项全面的调查强调了我们提出的修复系统有效修复裂纹的潜力。