The impact of seawater ions on urea decomposition and calcium carbonate precipitation in the MICP process

doi:10.1016/j.cemconcomp.2024.105631

	The impact of seawater ions on urea decomposition and calcium carbonate precipitation in the MICP process
	Fan, Qi 1,2; Fan, Liang 1; Quach, Wai-Meng 2; Duan, Jizhou 1
	2024-09-01
发表期刊	CEMENT & CONCRETE COMPOSITES
ISSN	0958-9465
卷号	152 页码:12
通讯作者	Fan, Liang(fanl@qdio.ac.cn) ; Quach, Wai-Meng()
摘要	As an environmentally friendly biotechnology, the microbial induced calcium carbonate precipitation (MICP) provides a new approach to repair concrete cracks. Most existing studies focused on finding a suitable environment for bacteria to induce as much calcium carbonate as possible, but the effect of actual concrete service environment on the repair of concrete cracks was usually ignored. This work compared the repair quality of cracked specimens via MICP with the original Sporosarcina (Sp.) pasteurii strain and salt -tolerant Sp. pasteurii strain in the deionized water and simulated seawater. Then the adverse effects of seawater ions on the MICP process was investigated. The results showed that the permeability coefficient of repaired specimens was 175.7 % higher, and the bond strength between the calcium carbonate and concrete surface was lower in the simulated seawater as compared with the deionized water environment. The high concentration of sodium, chloride, magnesium, and sulfate ions in the seawater led to the decrease of the urea decomposition rate and calcium carbonate yield rate, which further induced the decreased super -saturation of calcium carbonate and the conversion of the calcium carbonate crystal form from calcite to vaterite. Besides, the salt -tolerant strain with a high salt adaptability showed a higher repair ability in the simulated seawater as compared with the original strain.
关键词	MICP Marine environment Crack repair Permeability coefficient Salt-tolerant strain
DOI	10.1016/j.cemconcomp.2024.105631
收录类别	SCI
语种	英语
资助项目	Qingdao Natural Science Foundation Program[23-2-1-94-zyyd-jch] ; Shandong Natural Science Foundation Youth Program[ZR2023QE015] ; Shandong Excellent Youth Science Foundation Program[2023HWYQ- 100] ; Taishan Scholars Program
WOS研究方向	Construction & Building Technology ; Materials Science
WOS类目	Construction & Building Technology ; Materials Science, Composites
WOS记录号	WOS:001253757900001
出版者	ELSEVIER SCI LTD
WOS关键词	MINERALIZATION ; MUTAGENESIS ; CRACKS
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/186453
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Fan, Liang; Quach, Wai-Meng
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Adv Marine Mat, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China 2.Univ Macau, Dept Civil & Environm Engn, Taipa, Macau, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Fan, Qi,Fan, Liang,Quach, Wai-Meng,et al. The impact of seawater ions on urea decomposition and calcium carbonate precipitation in the MICP process[J]. CEMENT & CONCRETE COMPOSITES,2024,152:12.
APA	Fan, Qi,Fan, Liang,Quach, Wai-Meng,&Duan, Jizhou.(2024).The impact of seawater ions on urea decomposition and calcium carbonate precipitation in the MICP process.CEMENT & CONCRETE COMPOSITES,152,12.
MLA	Fan, Qi,et al."The impact of seawater ions on urea decomposition and calcium carbonate precipitation in the MICP process".CEMENT & CONCRETE COMPOSITES 152(2024):12.