Liu Luo, Li Youxi, Song Jianrong, Zhou Junlai, Yi Weijian, Ge Yangyang, Gao Kewei
Beijing Bioprocess Key Laboratory Beijing University of Chemical Technology Beijing China.
State Key Laboratory of Special Functional Waterproof Materials Beijing Oriental Yuhong Waterproof Technology Co., Ltd Beijing China.
Eng Life Sci. 2025 Feb 28;25(3):e70010. doi: 10.1002/elsc.70010. eCollection 2025 Mar.
This study focuses on applying microbial self-healing cement in repairing cracks in cement-based materials and enhancing its resistance to water penetration performance. Traditional cement is susceptible to environmental influences, leading to the formation of microcracks and a reduction in durability. This research used to prepare microcapsules through sodium alginate gelation technology. We mixed microcapsules into the cement. The results indicate that the microbial self-healing cement, with a 1% self-healing agent added, increased its resistance to water penetration ability by 29.2% after 28 days. This improvement rose to 39.3% after 84 days. Additionally, we used the embedded needle method to make mortar blocks through microcracks, mimicking the cracks found in real cement. The self-healing effect of the microcapsules was especially noticeable for cracks under 0.3 mm in diameter, compared to the commonly used commercial crystallization penetration technology. This is attributed to the crystalline bodies formed by the self-healing agent in the microcapsules blocking the cracks and preventing water penetration. This study provides an environmentally friendly solution for the repair of cracks in cement-based materials using microbial self-healing technology and lays the foundation for improving the repair efficiency and durability and exploring stability and reliability in the future. This study investigated the application of microbial self-healing cement in repairing cracks in cement-based materials and enhancing its resistance to water penetration properties. Cement, a material widely used in infrastructure, has low tensile strength and often forms microcracks. These microcracks reducing the durability of cement and posing risks to the economy and safety. Adding 1% self-healing agent to microbial self-healing cement significantly increases the resistance to water penetration pressure of the mortar blocks. Compared to the standard specimens, the resistance to water penetration ability increased by 29.2% at 28 days and further increased to 39.3% at 84 days. Microbial self-healing cement could effectively restore the resistance to water penetration performance of the mortar blocks after repairing cracks. The repairing results are significantly better than the methods of mixing or applying cement crystalline materials.
本研究着重于将微生物自修复水泥应用于修复水泥基材料中的裂缝，并增强其抗水渗透性能。传统水泥易受环境影响，导致微裂缝形成并降低耐久性。本研究采用海藻酸钠凝胶化技术制备微胶囊。我们将微胶囊混入水泥中。结果表明，添加1%自修复剂的微生物自修复水泥，在28天后其抗水渗透能力提高了29.2%。84天后，这一提升至39.3%。此外，我们采用埋针法使砂浆块产生微裂缝，模拟实际水泥中发现的裂缝。与常用的商业结晶渗透技术相比，微胶囊对直径小于0.3毫米的裂缝的自修复效果尤为显著。这归因于微胶囊中的自修复剂形成的晶体堵塞了裂缝并防止水渗透。本研究为利用微生物自修复技术修复水泥基材料中的裂缝提供了一种环保解决方案，并为未来提高修复效率和耐久性以及探索稳定性和可靠性奠定了基础。 本研究调查了微生物自修复水泥在修复水泥基材料中的裂缝并增强其抗水渗透性能方面的应用。水泥作为一种广泛应用于基础设施的材料，抗拉强度低，经常形成微裂缝。这些微裂缝降低了水泥的耐久性，并对经济和安全构成风险。向微生物自修复水泥中添加1%的自修复剂可显著提高砂浆块的抗水渗透压力。与标准试件相比，28天时抗水渗透能力提高了29.2%，84天时进一步提高到39.3%。微生物自修复水泥在修复裂缝后能有效恢复砂浆块的抗水渗透性能。修复效果明显优于混合或应用水泥晶体材料的方法。
