Bio-consolidation of cracks in masonry cement mortars by Acinetobacter sp. SC4 isolated from a karst cave
作者： Mengmeng Li , Chaolin Fang , Satoru Kawasaki , Minsheng Huang , Varenyam Achal
DOI: 10.1016/J.IBIOD.2018.03.008
关键词:
摘要: Abstract Microbially induced carbonate precipitation (MICP) is one of techniques for consolidation cementitious materials; however, limited biodiversity and inadequate information on its application suggests further extensive research in this area. In study, bacteria with ability to precipitate carbonate, preferably CaCO3, were isolated from Yixing Shanjuan Cave, China after analyzing bacterial diversity using Illumina MiSeq sequencing the V3-V4 region 16S rRNA gene. A total 58,712 effective gene sequences obtained, classified into 31 phyla. One highest urease-producing bacterium, Acinetobacter sp. SC4, was then used cracks created masonry cement mortars. The bio-consolidation led significant improvement compressive strength reduction water absorption It formed calcite observed under scanning electron microscopy, which agreement X-ray diffraction thermogravimetric analysis. presented work first study MICP related research.
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