The impact of seawater ions on urea decomposition and calcium carbonate precipitation in the MICP process
文献类型：期刊论文
| 作者 | Fan, Qi1,2; Fan, Liang1; Quach, Wai-Meng2; Duan, Jizhou1
|
| 刊名 | CEMENT & CONCRETE COMPOSITES
 |
| 出版日期 | 2024-09-01 |
| 卷号 | 152页码:12 |
| 关键词 | MICP Marine environment Crack repair Permeability coefficient Salt-tolerant strain |
| ISSN号 | 0958-9465 |
| DOI | 10.1016/j.cemconcomp.2024.105631 |
| 通讯作者 | Fan, Liang(fanl@qdio.ac.cn) ; Quach, Wai-Meng() |
| 英文摘要 | 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. |
| WOS关键词 | MINERALIZATION ; MUTAGENESIS ; CRACKS |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:001253757900001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/186452]  |
| 专题 | 海洋研究所_海洋腐蚀与防护研究发展中心 |
| 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 |
| 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. |
入库方式： OAI收割
来源：海洋研究所
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