This study aimed at developing a bacteria-based method to repair cracks in concrete (crack opening < 1 mm) that would be suitable for full-scale operations and economically viable. CaCO₃-producing bacteria were injected into calibrated cracks with bioavailable calcium and nutrients in a suspension thickened with a combination of Welan gum and Attagel® 50. These thickeners have synergistic effects, enhancing viscosity and shear-thinning behavior. These rheology characteristics made injection without drainage possible for crack widths ranging from 150 to 800 µm. Bacterial growth and the associated CaCO₃ biomineralization were enhanced in the presence of thickeners.

这项研究旨在开发一种基于细菌的方法来修复混凝土中的裂缝（裂缝开口<1 mm），该方法适用于全面操作并且在经济上可行。将产生CaCO _3的细菌与可生物利用的钙和营养素一起注入校准的裂缝中，该裂缝由Welan胶和Attagel®50混合后增稠，形成悬浮液。这些增稠剂具有协同作用，增强了粘度和剪切稀化行为。这些流变学特性使得裂缝宽度在150至800 µm范围内的注入无需排水即可。在增稠剂的存在下，细菌的生长和相关的CaCO ₃生物矿化作用得以增强。