Bridge crack self-repairing based on nanosilica-modified bacterial solution

• Autorzy: Zhou Yejun , Zhang Shengli , Liu Xiujuan , Yang Jun

Identyfikatory

DOI

10.2478/pjct-2025-0014

• Języki publikacji: EN

Abstrakty

EN

To address the challenge of self-healing concrete cracks (CCs) in bridge structures, a nano-SiO₂-modified bacterial solution was developed and systematically evaluated for its effectiveness in enhancing crack healing performance. Calcium lactate, used as a calcium source, increased the surface roughness of calcium carbonate crystals, enhancing Ca²⁺ adsorption and achieving a mineralization efficiency (ME) of 2.18 mol/h at 36 h. The optimized application process—three treatments at 15-minute intervals—significantly reduced the concrete’s chloride migration coefficient (8.48 × 10^-13 m²/s), electrical flux (327 C), and carbonation depth (2.8 mm after 13 days). After 28 days, the bacterial group repaired over 95% of both primary and secondary crack areas. These improvements are attributed to nano-SiO₂ providing a high specific surface area for microbial adhesion and promoting calcium carbonate precipitation, thus accelerating crack closure. The proposed nano-SiO₂-modified bacterial solution offers a sustainable and efficient approach to enhancing the durability and protective performance of concrete in bridge applications.

Słowa kluczowe

EN

nanosilica; microorganisms; bacillus pasteurianus; bridge cracks; self-repairing

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Green Sciences
• Rocznik: 2025
• Tom: Vol. 27, nr 3
• Strony: 24--32
• Opis fizyczny: Bibliogr. 22 poz., rys., tab., wykr., wz.

Twórcy

autor

Zhou Yejun

• Jiangxi Transportation Institute Co., Ltd, Nanchang, Jiangxi, China

autor

Zhang Shengli

• Liuzhou Institute of Technology, Liuhou, Guangxi, China

autor

Liu Xiujuan

• Sichuan Central Inspection Technology Inc., Zigong, Sichuan, China

autor

Yang Jun

• Sichuan Central Inspection Technology Inc., Zigong, Sichuan, China

Bibliografia

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