Jakubovskis Ronaldas, Jankutė Augusta, Guobužaitė Simona, Boris Renata, Urbonavičius Jaunius
Institute of Building and Bridge Structures Laboratory of Innovative Building Structures, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania.
Department of Chemistry and Bioengineering, Vilnius Gediminas Technical University, 10223 Vilnius, Lithuania.
Materials (Basel). 2021 May 21;14(11):2719. doi: 10.3390/ma14112719.
One of the biggest challenges in the development of a biological self-healing concrete is to ensure the long-term viability of bacteria that are embedded in the concrete. In the present study, a coated expanded clay (EC) is investigated for its potential use as a bacterial carrier in biological concrete. Eight different materials for coatings were selected considering cost, workability and accessibility in the construction industry. Long-term (56 days) viability analysis was conducted with a final evaluation of each coating performance. Our results indicate that healing efficiency in biological concrete specimens is strongly related to viable bacteria present in the healing agent. More viable bacteria-containing specimens exhibited a higher crack closure ratio. Our data suggest that the additional coating of EC particles improves long-term bacterial viability and, consequently, provides efficient crack healing in biological concrete.
生物自愈合混凝土开发过程中最大的挑战之一是确保嵌入混凝土中的细菌的长期生存能力。在本研究中，对一种涂层膨胀黏土（EC）作为生物混凝土中细菌载体的潜在用途进行了研究。考虑到成本、施工性能和在建筑行业中的可获取性，选择了八种不同的涂层材料。进行了长期（56天）生存能力分析，并对每种涂层性能进行了最终评估。我们的结果表明，生物混凝土试件的愈合效率与愈合剂中存在的活细菌密切相关。含有更多活细菌的试件表现出更高的裂缝闭合率。我们的数据表明，EC颗粒的额外涂层提高了细菌的长期生存能力，从而在生物混凝土中提供了有效的裂缝愈合。
